IF 11.6! Graphene-Encapsulated Nickel Nanoparticles Promote Stable and Selective Butadiene Hydrogenation

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A simple citric acid-assisted pyrolysis strategy was used to prepare nickel nanoparticles encapsulated by graphene layers (Ni@C) for selective butadiene hydrogenation. Systematic adjustment of the calcination temperature (873–1173 K) allows control over the Ni particle size (12.8–27.5 nm) and carbon encapsulation thickness. Catalysts synthesized at higher temperatures (1073–1173 K) exhibit excellent performance, achieving 97% butene selectivity at 373 K and maintaining >98% of the initial activity over 100 hours.In contrast, catalysts carburized at lower temperatures (873–973 K) exhibited rapid deactivation associated with excessive carbon deposition. Kinetic studies indicate that the enlarged Ni particles enhance the adsorption of butadiene, while the relative adsorption strength between butadiene and the intermediate product butene increases, thereby suppressing excessive hydrogenation of butane. The graphene covering layer not only hasIt effectively reduces the oxidation of nickel exposed to air and prevents metal agglomeration under hydrogenation conditions, ensuring structural integrity. Comparative evaluations emphasize that carefully designed graphene-encapsulated nickel catalysts outperform traditional systems in balancing selectivity and durability. This study advances the rational design of encapsulated engineering catalysts for industrial hydrogenation processes that require precise product control.

Original link

Graphene-armored nickel nanoparticles promote stable and selective butadiene hydrogenation

Carbon ( IF 11.6 )

Pub Date : 2025-06-16

DOI: 10.1016/j.carbon.2025.120536

Mengqi Yang,  Tongtong Feng,  Shuangfeng Ren,  Jingyi Chen,  Xiaoling Mou,  Li Yan,  Ronghe Lin,  Yunjie Ding