Carding: Lou Xiongwen‘s Team Results Selection

Biography

Prof. Xiongwen Lou was born in Jinhua, Zhejiang in 1978. He received a first-class honours degree and a master‘s degree from the National University of Singapore in 2002 and 2004, and a doctorate degree in chemical and biomolecular engineering from Cornell University in 2008. He was awarded the Austin Hooey Prize and the Liu Memorial Prize for his outstanding work. He is currently a professor in the Department of Chemistry and Biological Engineering of Nanyang Technological University. The main research direction is the synthesis of metal oxide frame structure (MOF) materials and their applications in energy and environment related fields. Professor Xiongwen Lou focused on the research of new energy materials and devices and achieved outstanding research results. Fellow of the Chemical Society Fellow of Royal Society of Chemistry (FRSC), World Cultural Council (WCC) special recognition award in 2013, 15th Asian Chemistry Conference-Asian Rising Star, same year in Singapore National Academy of Sciences-Young Scientist Award. He was selected as the Singapore National Research Foundation (NRF) Investigatorship in 2015. Prof. Xiongwen Lou is currently Deputy Editor of Science Advances, Deputy Editor of Journal of Materials Chemistry A, and Editor of Small Methods. He has published more than 300 papers, with a total of 63,400 citations and an H index of 151.

In order to facilitate everyone to quickly preview the scientific research results of Professor Lou Xiongwen and his research team in recent years, the editors summarize the results that have been promoted on the material source:

paper:

Angew. Chem. Int. Ed.: Construction of Multilayer Cobalt Sulfide Nanoboxes and Their Applications in Sodium Ion Batteries

Prof. Xiongwen Lou from Nanyang Technological University in Singapore and Prof. Gao Shuyan (co-corresponding author) from Henan Normal University have used metal-organic framework (MOF) as a self-sacrifice template to construct cobalt sulfide multilayer nanoboxes (MSNBs) using anion conversion and exchange strategies. A research paper entitled " Synthesis of Cobalt Sulfide Multi-shelled Nanoboxes with Precisely Controlled Two to Five Shells for Sodium-Ion Batteries " was published on Angew. Chem. Int. Ed . The number of layers (2-5 layers) of the nanobox can be easily controlled by changing the temperature. When used as the negative electrode of a sodium ion battery, the sodium storage performance of the obtained cobalt sulfide multilayer nanobox is significantly enhanced. For example, for a three-layer nanobox, it still retains 438 mAh after 100 cycles at a current density of 500 mA · g ^-1g ^-1 high specific capacity.

Reference link: Synthesis of Cobalt Sulfide Multi-shelled Nanoboxes with Precisely Controlled Two to Five Shells for Sodium-Ion Batteries ( Angew. Chem. Int. Ed. , 2019, DOI: 10.1002 / anie.201812387)

Adv. Mater .: Ultra-small MoOx clusters as a new type of co-catalyst to promote photocatalytic hydrogen evolution reaction

Photocatalytic cracking of water enables efficient use of light by producing clean hydrogen fuel. At present, semiconductor materials have been selected as photocatalysts to participate in the photocatalytic water cracking process due to their unique physical, chemical and electrical properties. However, photo-generated electron-hole recombination of most semiconductor materials is easy, which limits the efficiency of catalytic hydrogen evolution. The researchers solved this problem by depositing a cocatalyst on the surface of the semiconductor photocatalyst. At present, the performance of platinum-based co-catalyst is the best, but its practical application is limited by its low crust abundance and high cost. Ultra-small metal oxide cluster co-catalysts can exhibit quantum effects, which has the potential to increase the activity of semiconductor photocatalysts.

Recently, ultra-small MoO _x clusters, as a new type of non-precious metal cocatalyst, were deposited on the surface of CdS nanowires by a bottom-up method. The MoO _x clusters on the surface of CdS maintain the basic configuration of Mo-O clusters in the precursor (NH ₄ ) ₆ Mo ₇ O ₂₄and greatly improve the photocatalytic hydrogen evolution efficiency of CdS nanowires. Related work was published on Adv. Mater. Corresponding author and first author are Professor Lou Xiongwen and Dr. Huabin Zhang of Nanyang Technological University.

Literature link: Ultrasmall MoOx Clusters as a Novel Cocatalyst for Photocatalytic Hydrogen Evolution ( Adv. Mater., 2018, DOI: 10.1002 / adma.201804883 )

J. Am. Chem. Soc .: Co9S8 @ ZnIn2S4 graded heterojunction cage for efficient photocatalytic hydrogen production

Professor Xiongwen Lou (corresponding author) from Nanyang Technological University in Singapore published an article on J. Am. Chem. Soc. Entitled: Formation of Hierarchical Co ₉ S ₈ @ZnIn ₂ S ₄ Heterostructured Cages as an Efficient Photocatalyst for Hydrogen Evolution. In this paper, the authors show the design and synthesis of a Co ₉ S ₈ @ZnIn ₂ S ₄ hierarchical heterostructure cage and its photocatalytic hydrogen production performance. The two photosensitive sulfide semiconductors are reasonably integrated into a hierarchical hollow structure with a strongly coupled heterogeneous shell and a two-dimensional ultra-thin subunit. The special structure can effectively promote the separation and transmission of photo-generated charges, and the large surface area provides rich active sites for photocatalytic reactions. Due to its unique structure and composition characteristics, the Co ₉ S ₈ @ZnIn ₂ S ₄ graded hollow heterostructure exhibits excellent photolytic water activity without any cocatalyst (hydrogen generation rate is 6250 μmol h ^–1 g ^–1 ) And good stability.

Literature link: Formation of Hierarchical Co ₉ S ₈ @ZnIn ₂ S ₄ Heterostructured Cages as an Efficient Photocatalyst for Hydrogen Evolution , (J. Am. Chem. Soc., 2018, DOI: 10.1021 / jacs.8b07721)

Adv. Funct. Mater.: Nickel Monoatomic Surface Modified MoS2 Nanosheets and Their Enhanced Electrocatalytic Hydrogen Evolution

Professor Lou Xiongwen (corresponding author) of Nanyang Technological University, Singapore, etc. modified isolated nickel atoms and grown them on layered MoS ₂ nanosheets supported by multi-channel carbon nanofibers , which fully confirmed that the surface regulation strategy can effectively improve the hydrogen evolution activity, and was effective in Adv. Funct. Mater. Published a research paper entitled " Surface Modulation of Hierarchical MoS ₂ Nanosheets by Ni Single Atoms for Enhanced Electrocatalytic Hydrogen Evolution ". X-ray absorption fine structure research and density functional theory (DFT) calculations show that the surface of MoS ₂ modified by isolated Ni atoms shows higher hydrogen binding energy. Thanks to the unique tubular structure and basal surface regulation, the obtained MoS ₂ catalyst has excellent hydrogen evolution activity and stability. The above-mentioned one-atom modification strategy opens a new way to regulate the intrinsic catalytic activity of electrocatalytic decomposition of water and other energy-related processes.

Literature link: Surface Modulation of Hierarchical MoS ₂ Nanosheets by Ni Single Atoms for Enhanced Electrocatalytic Hydrogen Evolution ( Adv. Funct. Mater. , 2018, DOI: 10.1002 / adfm.201807086)

Energy Environ. Sci. Lou Xiongwen: Construction of a single-atom catalyst with highly efficient electrocatalytic oxygen reduction activity through a modular strategy

Lou Xiongwen (corresponding author) of Nanyang Technological University in Singapore and others have found that a monoatomic Co catalytic active center with a specific coordination configuration can be embedded in a carbon material with a complex multi-stage channel structure (Co @MCM) to achieve efficient electrocatalytic oxygen reduction activity. The X-ray absorption fine structure results prove that the CoN ₄ coordination configuration in the module can be well maintained in the carbon-based catalytic material. The newly constructed Co @ MCM not only has highly efficient CoN ₄ reactive active centers, but also has high conductivity and multi-stage pore structure, thus exhibiting excellent oxygen reduction reaction (ORR) activity. The research results not only provide some basic research ideas for accurately regulating nanostructured catalysts at the atomic scale, but also reveal the structural origin of enhanced catalytic activity. Related results were published on Energy & Environmental Science under the title of " A modular strategy for decorating isolated cobalt atoms into multichannel carbon matrix for electrocatalytic oxygen reduction " .

Literature link: A modular strategy for decorating isolated cobalt atoms into multichannel carbon matrix for electrocatalytic oxygen reduction (Energy Environ. Sci., 2018, DOI: 10.1039 / C8EE00901E)

J. Am. Chem. Soc .: Construction of ZnIn2S4-In2O3 hierarchical tubular heterojunction and its efficient photoreduction of CO2

Nanyang Technological University Professor Wen-hung floor (corresponding author) and other rational design and build a sandwich ZnIn2S ₄ -In ₂ O ₃ grade tubular heterojunction as efficient and stable photocatalysts for the visible reduction of CO ₂ , and in J. Am A research paper entitled " Construction of ZnIn ₂ S ₄ −In ₂ O ₃ Hierarchical Tubular Heterostructures for Efficient CO ₂ Photoreduction " was published on Chem. Soc . This unique design integrates the In ₂ O ₃ one-dimensional (1D) tubular structure and the ZnIn ₂ S ₄ ultra-thin two-dimensional (2D) nanosheet secondary structure, which promotes the separation and migration of photo-generated carriers and improves The adsorption of CO ₂ molecules was exposed, and abundant surface active sites were exposed. Benefiting from the above structure and composition characteristics, the optimal ZnIn ₂ S ₄ −In ₂ O_{The 3} heterojunction photocatalyst showed high CO ₂ deoxygenation activity and stability, and the CO yield was 3075 μmol · h ^-1 · g ^-1 .

Literature link: Construction of ZnIn ₂ S ₄ −In ₂ O ₃ Hierarchical Tubular Heterostructures for Efficient CO ₂ Photoreduction ( J. Am. Chem. Soc. , 2018, DOI: 10.1021 / jacs.8b02200)

Angew. Chem. Int. Ed.: Formation of NiCo2V2O8 Egg Yolk-Double Shell Balls and Their Enhanced Lithium Storage Properties

Prof. Xiongwen Lou (corresponding author) of Nanyang Technological University, Singapore, etc. used a simple self-template strategy to construct a complex chemical composition of NiCo ₂ V ₂ O ₈ egg yolk-double shell metal vanadate nanomaterials . Ed. Published a research paper entitled " Formation of NiCo ₂ V ₂ O ₈ Yolk-Double Shell Spheres with Enhanced Lithium Storage Properties ". This paper was selected as a VIP paper. The authors used Ni-Co glycerol complex spheres as precursors to synthesize NiCo ₂ V ₂ O ₈ egg yolk-double shell spheres (YDSSs) through anion exchange reaction with VO ₃ ^- and calcination . With the advantages of composition and structure, the above-mentioned NiCo ₂ V ₂ O ₈ YDSSs have excellent lithium storage performance as a lithium ion battery negative electrode. In addition, at a high current density of 1.0 A · g ^-1 , it remains as high as 1228 mAh · g after 500 cyclesReversible capacity of ^-1 .

Literature link: Formation of NiCo ₂ V ₂ O ₈ Yolk-Double Shell Spheres with Enhanced Lithium Storage Properties ( Angew. Chem. Int. Ed. , 2018, DOI: 10.1002 / anie.201800363)

Angew. Chem. Int. Ed .: Hierarchical hollow nanoprisms composed of ultra-thin Ni-Fe LDH nanosheets and their enhanced electrochemical OER activity

Professor Lou Xiongwen (corresponding author) from Nanyang Technological University, Singapore, etc. prepared a graded hollow nano prism composed of ultra-thin Ni-Fe LDH nanosheets using a simple self-template strategy, and published a question on Angew. Chem. Int. Ed. A research paper on " Hierarchical Hollow Nanoprisms Based on Ultrathin Ni-Fe Layered Double Hydroxide Nanosheets with Enhanced Electrocatalytic Activity towards Oxygen Evolution ". The paper was selected as a hot paper and highlighted as a cover article. This work is the first to use tetragonal nickel precursor nanoprisms as a self-sacrifice template. After that, the nickel precursor is consumed in the hydrolysis of ferrous sulfate, and at the same time, a layer of Ni-Fe LDH nanosheets will be grown on the surface. The obtained Ni-Fe LDH hollow prism with a large surface area has significantly improved electrocatalytic activity, and has a lower OER overpotential, a smaller Tafer slope, and excellent stability.

Literature link: Hierarchical Hollow Nanoprisms Based on Ultrathin Ni-Fe Layered Double Hydroxide Nanosheets with Enhanced Electrocatalytic Activity towards Oxygen Evolution (Angew. Chem. Int. Ed., 2017, DOI: 10.1002 / anie.201710877)

Adv. Mater.: Study on the Construction of Co3O4 @ Co3V2O8 Composite Hollow Structure and Its Lithium Storage Performance

Nanyang Technological University Professor Wen-hung floor (corresponding author) and other multilayer Co transformation strategy prepared by the new MOFs ₃ O ₄ @Co ₃ V ₂ O ₈ composite nano-box and . Mater Adv. Delivered a presentation entitled " Construction of Complex Co ₃ O ₄ @Co ₃ V ₂ O ₈ Hollow Structures from Metal-Organic Frameworks with Enhanced Lithium Storage Properties ”. The above strategy relies on the unique reaction of ZIF-67 with a vanadium source (vanadium triisopropoxide). Benefiting from the versatility of its synthesis, researchers can implement three- and two-layer Co ₃ O ₄ @Co ₃ V ₂ O ₈ nanoboxes and single-layer Co 3 V ₂ O ₈Synthesis of a series of nano hollow structures such as nano boxes. When the hollow structure prepared as above is used as an electrode material of a lithium ion battery, all of them exhibit superior lithium storage performance. For example, at a current density of 100 mA · g ^-1 , a three-layer Co ₃ O ₄ @Co ₃ V ₂ O ₈ nanobox still has a reversible capacity of up to 948 mAh · g ^-1 after 100 cycles .

Literature link: Construction of Complex Co ₃ O ₄ @Co ₃ V ₂ O ₈ Hollow Structures from Metal-Organic Frameworks with Enhanced Lithium Storage Properties (Adv. Mater., 2017, DOI: 10.1002 / adma.201702875)

J. Am. Chem. Soc.: In2S3−CdIn2S4 Hierarchical Heterostructure Nanotubes for Efficient and Stable Visible Light Reduction of CO2

Technological University Professor F male described (author) and the like rational design and preparation of the In ₂ S _{. 3} -CdIn ₂ S _{. 4} hierarchical structure of phase nanotubes as efficient and stable catalysts for the visible light reduction of CO.‘S ₂ , and J. A research paper entitled " Formation of Hierarchical In ₂ S ₃ -CdIn ₂ S ₄ Heterostructured Nanotubes for Efficient and Stable Visible Light CO ₂ Reduction " was published on Am. Chem. Soc . Utilizing a novel self-template strategy and continuous anion and cation exchange reactions, two unique metal sulfide semiconductors are formed into a hierarchical tubular composite with a uniform heterogeneous interface and ultra-thin two-dimensional (2D) nanosheet units. Therefore, the prepared hierarchical nanotubes can promote the separation and migration of photo-generated carriers, improve the adsorption and enrichment of CO ₂ molecules, and provide rich active sites to participate in surface redox reactions. Benefiting from the above structure and composition characteristics, the optimal In ₂ S ₃ -CdIn ₂ S ₄The graded nanotubes show high CO yield (825 μmol · h ^-1 · g ^-1 ) and excellent stability in a visible light reduction CO ₂ system without a noble metal promoter .

Reference link: Formation of Hierarchical In ₂ S ₃ −CdIn ₂ S ₄ Heterostructured Nanotubes for Efficient and Stable Visible Light CO ₂ Reduction (J. Am. Chem. Soc., 2017, DOI: 10.1021 / jacs.7b10733)

Angew. Chem. Int. Ed.: Mesoporous Carbon @ Titanium Nitride Hollow Spheres as High-Efficiency SeS2 Carriers for Advanced Li-SeS2 Cells

Professor Lou Xiongwen (corresponding author) from Nanyang Technological University, Singapore, etc. promoted the strength of SeS ₂ and avoided the shortness of SeS _{2 to} design and synthesize a hollow mesoporous carbon @ titanium nitride (HMC @ TiN) as a carrier for SeS ₂ for Li -SeS ₂ battery anode material, published a research paper entitled " Mesoporous Carbon @ Titanium Nitride Hollow Spheres as an Efficient SeS ₂ Host for Advanced Li-SeS ₂ Batteries " on Angew. Chem. Int. Ed . This paper was selected as a hot paper. Benefiting from the physical and chemical trapping of hollow mesoporous carbon and TiN, HMC @ TiN / SeS ₂ positive electrode active material has a higher utilization rate and good cycle stability. In addition, in the case of a high load electrode, its area capacity is high (4 mAh · cm ^-2 ) and the battery performance is stable.

Literature link: Mesoporous Carbon @ Titanium Nitride Hollow Spheres as an Efficient SeS ₂ Host for Advanced Li–SeS ₂ Batteries (Angew. Chem. Int. Ed., 2017, DOI: 10.1002 / anie.201709176)

Angew.Chem. Int. Ed .: Self-supporting SeS2 cathode based on CoS2 modified multi-channel carbon fiber for improving lithium storage performance

Prof. Xiongwen Lou of Nanyang Technological University published an article entitled " A Freestanding Selenium Disulfide Cathode Based on Cobalt Disulfide-Decorated Multichannel Carbon Fibers with Enhanced Lithium Storage Performance " in Angewandte Chemie-International Edition , reporting a CoS ₂ nanoparticle modification The lotus root type carbon fiber network (CoS ₂ @LRC) is used as the host material of SeS ₂ to improve lithium storage performance. The monolithic electrode is composed of three-dimensionally cross-linked multi-channel carbon fibers, which can not only accommodate high content of SeS ₂ (70wt%), but also ensure fast electron and ion transmission, thus achieving high capacity utilization, at a current of 0.2A / g The density can reach 1015mAh / g.

Literature link: A Freestanding Selenium Disulfide Cathode Based on Cobalt Disulfide-Decorated Multichannel Carbon Fibers with Enhanced Lithium Storage Performance(Angew.Chem. Int. Ed., 2017, DOI: 10.1002 / anie.201708105)

Angew. Chem. Int. Ed .: Carbon-coated Ultrathin SnS Nanosheets Assemble Multi-Structured Nanotubes for Rapid Sodium Storage

From the floor of the male culture professor at Nanyang Technological University and the event Xin away researcher at Zhejiang University (co-author), where Pere (first author) in Angewandte Chemie International Edition published a report entitled the " your Hierarchical Nanotubes Constructed by Carbon-Coated Ultrathin SnS nanosheets for Fast Capacitive Sodium Storage " article. In this paper, a simple template preparation method is introduced, and finally a multi-level structure nanotube material assembled from SnS ultra-thin nanosheets is synthesized. At the same time, in order to further improve the electrochemical performance of the material, glucose was added to the reaction system, so that the surface of the SnS nanotubes was coated with a carbon layer (referred to as SnS @ Cnanotubes). Based on such unique structural advantages, SnS @ C nanotubes exhibit excellent sodium storage properties such as good cycle stability and good rate performance.

Literature link: Hierarchical Nanotubes Constructed by Carbon-Coated Ultrathin SnS Nanosheets for Fast Capacitive Sodium Storage (2017, Angewandte Chemie International Edition, DOI: 10.1002 / anie.201706652)

Angew. Chem. Int. Ed .: A P2-Na0.7CoO2 Microsphere for the Preparation of High-Energy Anodes for Practical Sodium Ion Batteries

The increase in global demand for electricity from sustainable energy has promoted the development of cheap and efficient energy storage systems. As one of the energy storage methods, sodium electricity has attracted much attention due to its low price, chemical / electrochemical storage mechanism similar to that of lithium batteries with high commercial applications, and abundant sodium ion storage. Among them, the anode material has become a key point to limit the development of sodium ion batteries. Layered metal oxides are considered to be a class of materials that are expected to be suitable as suitable anodes due to their abundant reserves and multiple types of electrochemical elements. Layered metal oxides can be divided into two categories: O3 and P2. O3 material has a stable structure for Na ⁺ de-intercalation, but its specific capacity can hardly exceed 120mAhg ^-1 . P2 type anode materials can provide higher specific energy, but due to its multiphase change during the electrochemical reaction, Cyclic stability is usually not guaranteed. So far, the modification of O3 oxides has mostly focused on the regulation of active metal boundaries and ratios, the characterization of reaction mechanisms and structural analysis, and few studies on the influence of morphology on electrochemical activity.

Lou Xiongwen‘s group at Nanyang Technological University in Singapore studied a method for preparing P2-Na _0.7 CoO ₂ microspheres by a two-step self-template method. CoCO ₃ is converted into Co ₃ O ₄ microspheres through an optimized hydrothermal method and calcination in air . At higher temperatures, the Co ₃ O ₄ microspheres react with a certain amount of Na ₂ CO ₃to form P2-Na _0.7 CoO ₂ . Even after calcination at high temperature, P2-Na _0.7 CoO ₂ nanoparticles can still maintain spherical morphology. This microsphere exhibits excellent sodium storage performance, excellent rate performance and cycle performance.

Original link : A Practical High-Energy Cathode for Sodium-Ion Batteries Based on Uniform P2-Na0.7CoO2 Microspheres
(Angew. Chem. Int. Ed., 2017, DOI: 10.1002 / anie.201702024)

Angew.Chemie .: Hybrid supercapacitor with double-shell zinc-cobalt sulfide dodecahedron cage prepared from bimetal zeolite imidazolate skeleton

Among many electrochemical energy storage devices, hybrid capacitors (HSCs) have received attention due to their high energy density, fast charge and discharge characteristics, and excellent cycle stability. Due to the high specific capacity of transition metal sulfide materials, abundant reduction sites and improved electrical conductivity have become the focus of attention. The mixed metal sulfide can realize the conversion between different ions and the improvement of the electronic conduction of the structure during the heavy discharge. The design of battery-type electrodes can effectively improve the electrochemical performance of materials. The existing hollow structures with high specific surface area, abundant active sites, and shortened charge transfer paths are reflected in many fields of energy storage tubes. Among various hollow structures, multi-shell hollow structures have better electrochemical performance than single-shell structures. Adjacent shell structures can interact, ultimately increasing the number of active species and the cycling performance of the material.

Prof. Xiongwen Lou (corresponding author) of Nanyang Technological University, Singapore uses a combination of chemical etching and vulcanization processes to prepare double-shell zinc-cobalt sulfides from zinc-cobalt and cobalt-based zeolite structures as the raw material tetrahedral cage material which in 1Ag- ^{. 1} at a current density having 1266Fg ^-1 specific capacitance of 10,000 cycles 91% capacity holdings excellent cycle stability.

Original link: Formation of Double-Shelled Zinc–Cobalt Sulfide Dodecahedral Cages from Bimetallic Zeolitic Imidazolate Frameworks for Hybrid Supercapacitors

Energ. Environ. Sci .: Preparation of High-Capacitance Hollow Particle-Based Nitrogen-Doped Carbon Nanofibers

The preparation of one-dimensional hollow carbon nanomaterials often uses a stencil method, which is cumbersome. If nitrogen doping is to be achieved, more complex chemical reactions are required. Recently, Professor Lou Xiongwen and Le Yu (Communications) from Nanyang Technological University in Singapore published an article entitled " Designed formation of hollow particle-based nitrogen-doped carbon nanofibers for high-performance supercapacitors " on Energy & Environmental Science . A simple electrostatic spinning and high-temperature carbonization method was used to successfully synthesize hollow particle-based nitrogen-doped carbon nanofibers (HPCNFs-N). This material is excellent in properties capacitor, having a high specific capacitance (at G 1.0A ^-1 under G to 307.2F ^-1 , G at 50.0A ^{- . 1} at 193.4F g to ^-1 ), high energy / power density (maximum energy The density is 10.96 W h kg ^{- 1} and the power density is 25 000 W kg ^{- 1} ), and the cycle stability is good, only 1.8% of the capacitance loss in 10,000 cycles.

Reference link: Designed formation of hollow particle-based nitrogen-doped carbon nanofibers for high-performance supercapacitors (Energ. Environ. Sci., 2017, DOI: 10.1039 / C7EE00488E)

Angew. Chem. Int. Ed .: NiCoP / C nanoboxes are used for oxygen evolution reaction and have enhanced catalytic activity for oxygen evolution

Angewandte Chemie International Edition published an article entitled " Carbon-Incorporated Nickel-Cobalt Mixed Metal Phosphide Nanoboxes with Enhanced Electrocatalytic Activity for Oxygen Evolution ", which reports Professor Lou Xiongwen ( corresponding author ), School of Chemical and Biological Engineering, Nanyang Technological University The latest results of the research group on the hollow structure of nickel-cobalt phosphide in electrocatalysis. The researchers used ZIF-67 cubic particles as precursors to synthesize carbon-containing nickel-cobalt double metal phosphide nanoboxes (NiCoP / C) through a metal-organic framework (MOF) strategy, and tested their electrochemical performance—— Oxygen evolution reaction (OER). Due to its unique hollow nanostructure and composition, the NiCoP / C nanobox exhibits strong electrocatalytic activity, and the current density can reach 10 mA · cm ^-2 only at an overpotential of 330 mV . In addition, the stability of the material in the OER reaction is also greatly enhanced. Under the same conditions, it is superior to NiCoP nanoboxes and double-layer nickel-cobalt hydroxide (Ni-Co LDH) nanoboxes (for comparison).

Reference link : Carbon-Incorporated Nickel–Cobalt Mixed Metal Phosphide Nanoboxes with Enhanced Electrocatalytic Activity for Oxygen Evolution (Angew. Chem. Int. Ed., 2017, DOI: 10.1002 / anie.201612635)

Adv. Mater. Challenges in Synthesis of Specific Nanoparticles Using Continuous Ion Exchange in Supercapacitors

From Singapore‘s Nanyang Technological University, School of Chemical and Biological Engineering Professor Wen-hung floor and the rock art researcher Song Changchun Institute of Applied Chemistry study (co-corresponding author ) onion-like - continuous ion exchange equipment shows a distinctive structure of nano particles Hollow structure shell-type transition group metal sulfide, the precursor used is also onion-like metal oxide particles. The continuous ion exchange reaction used in this experiment can simultaneously control the structure and composition. First , the onion-like Co ₃ O ₄ particles are transformed into Co ₄ S ₃particles through the ion exchange reaction of Co ₃ O ₄ and S ²⁻ , and then the NiCo ₂ S ₄ particles are formed by continuous