Atomically dispersed MoNi alloy catalyst for partial oxidation of methane
Zheyuan Ding, Sai Chen, Tingting Yang, Zunrong Sheng, Xianhua Zhang, Chunlei Pei, Donglong Fu, Zhi‐Jian Zhao, Jinlong Gong
Abstract
Abstract The catalytic partial oxidation of methane (POM) presents a promising technology for synthesizing syngas. However, it faces severe over-oxidation over catalyst surface. Attempts to modify metal surfaces by incorporating a secondary metal towards C–H bond activation of CH 4 with moderate O* adsorption have remained the subject of intense research yet challenging. Herein, we report that high catalytic performance for POM can be achieved by the regulation of O* occupation in the atomically dispersed (AD) MoNi alloy, with over 95% CH 4 conversion and 97% syngas selectivity at 800 °C. The combination of ex-situ/in-situ characterizations, kinetic analysis and DFT (density functional theory) calculations reveal that Mo-Ni dual sites in AD MoNi alloy afford the declined O 2 poisoning on Ni sites with rarely weaken CH 4 activation for partial oxidation pathway following the combustion reforming reaction (CRR) mechanism. These results underscore the effectiveness of CH 4 turnovers by the design of atomically dispersed alloys with tunable O* adsorption.