Atomically dispersed MoNi alloy catalyst for partial oxidation of methane

作者：Zheyuan Ding, Sai Chen, Tingting Yang, Zunrong Sheng, Xianhua Zhang, Chunlei Pei, Donglong Fu, Zhi‐Jian Zhao, Jinlong Gong · 发表于：Nature Communications · 年份：2024 · DOI：10.1038/s41467-024-49038-x · 被引用次数：46 · 研究领域：Catalytic Processes in Materials Science、Catalysis and Oxidation Reactions、Electrocatalysts for Energy Conversion

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.