Zhang Cai, Zhang Wei, Drewett Nicholas E, Wang Xiyang, Yoo Seung Jo, Wang Haoxiang, Deng Ting, Kim Jin-Gyu, Chen Hong, Huang Keke, Feng Shouhua, Zheng Weitao
State Key Laboratory of Automotive Simulation and Control, and School of Materials Science & Engineering, and Electron, Microscopy Center, and International Center of Future Science, Jilin University, Changchun, 130012, P.R. China.
CIC Energigune, Miñano, 01510, Spain.
ChemSusChem. 2019 Mar 7;12(5):1000-1010. doi: 10.1002/cssc.201802618. Epub 2019 Feb 12.
Ni/CeO enables either methane decomposition or water electrolysis for pure hydrogen production. Ni/CeO , prepared by a sol-gel method with only one heat treatment step, was used to catalyze methane decomposition for the generation of H . The solid byproduct, Ni/CeO /carbon nanotube (CNT), was further employed as an electrocatalyst in the hydrogen evolution reaction (HER) for H production. The Ni/CeO catalyst exhibits excellent activity for methane decomposition because CeO prevents carbon encapsulation of Ni nanoparticles during the preparation process and forms a special metal-support interface with Ni. The derived CNTs act as antenna to improve conductivity and promote the dispersion of agglomerated Ni/CeO . In addition, they provide H diffusion paths and prevent Ni/CeO from peeling off the HER electrode. Although long-term methane decomposition reduces the HER activity of Ni/CeO /CNTs (owing to degradation of the delicate Ni/CeO interface), the tunable nature of the synthesis makes this an attractive sustainable approach to synthesize future high-performance materials.
镍/二氧化铈可用于甲烷分解或水电解以制取纯氢。通过仅一步热处理的溶胶-凝胶法制备的镍/二氧化铈用于催化甲烷分解以生成氢气。固体副产物镍/二氧化铈/碳纳米管进一步用作析氢反应中的电催化剂以制取氢气。镍/二氧化铈催化剂对甲烷分解表现出优异的活性，因为二氧化铈在制备过程中防止镍纳米颗粒被碳包裹，并与镍形成特殊的金属-载体界面。衍生的碳纳米管起到天线的作用，提高导电性并促进团聚的镍/二氧化铈的分散。此外，它们提供氢扩散路径并防止镍/二氧化铈从析氢反应电极上剥离。尽管长期的甲烷分解会降低镍/二氧化铈/碳纳米管的析氢活性（由于精细的镍/二氧化铈界面的降解），但合成的可调性使其成为一种有吸引力的可持续方法，用于合成未来的高性能材料。
