Integrating Catalysis of Methane Decomposition and Electrocatalytic Hydrogen Evolution with Ni/ CeO2 for Improved Hydrogen Production Efficiency...

摘要

Hydrogen, the ideal clean energy carrier, can be generated either by heterogeneous catalytic decomposition of methane (CDM) using transition-metal (e.g., Fe, Co, Ni) catalysts or by the electrocatalytic hydrogen evolution reaction (HER), which typically employs expensive platinum-based catalysts. Intensive efforts have been made to find alternative low-cost and stable catalysts such as metallic nickel although improving its relatively low catalytic activity and conductivity remains challenging. One strategy that has shown promise involves the use of effective metal-metal oxide interface such as CeO2 However, a HER electrocatalyst must afford not only favorable catalytic activity but also offer excellent conductivity and a large specific area rendering the Ni/CeO2 catalyst itself insufficient for high HER activity.