【Research Background】

Hydrogen (H 2 ) has the advantage of clean energy, and its energy density is as high as 120-140 MJ kg ⁻¹ . Its environmentally friendly production is the key to using this clean energy, and the hydrogen evolution reaction (HER) represents an efficient power conversion route. In the absence of a suitable catalyst, high overpotential always leads to low efficiency. Although great efforts have been invested to find non-noble metal catalysts that are cheaper and easier to use for HER, unfortunately, due to the instantaneous adsorption of H by the change in free energy, the change in free energy is less than the low overpotential and rapid Pt dynamics. Therefore, it is necessary to find an efficient platinum-based nanocatalyst.

【Achievement Introduction】

Recently, the team of Professor Wang Xiaohui of the Institute of Metal Research , Chinese Academy of Sciences published a research paper titled: Ultrastable MXene @ Pt / SWCNTs‘ Nanocatalysts for Hydrogen Evolution Reactio n in the internationally renowned academic journal  Advanced Functional Materials .

【Graphic introduction】

Figure 1. Preparation of a) Ti 3 C 2 T x MXene colloidal suspension and b) Preparation of MXene @ Pt / SWCNTs nanocatalyst .

Figure II .  Analysis of morphology and elements.

Figure 3. High magnification SEM images of a) SM, c) SM-1pt, e) SM-5pt . b) SM, d) SM-1pt, f) SM-5pt low-power SEM images.

Figure IV . Preparation of Sample XPS analysis.

FIG five . Hydrogen production electrochemical catalytic performance comparison test.

Figure VI . Analysis of Kinetic.

【Summary of this article】

In summary, this work utilizes the particularity of Ti 3 C 2 T x MXene to maintain its physicochemical properties after reducing platinum complex ions, and the characteristics of SWCNTs as a conductive binder to construct graded Pt-MXene CNTs heterostructure high-performance HER catalyst.

Literature link:

DOI: 10.1002 / adfm.202000693

Source: MXene Frontier