甲烷化
双金属片
催化作用
格式化
镍
无机化学
材料科学
过渡金属
氢
吸附
化学工程
甲烷
化学
物理化学
冶金
有机化学
工程类
作者
Yutong Pan,Xiaoyu Han,Xuefeng Chang,Heng Zhang,Xiaohui Zi,Ziwen Hao,Jiyi Chen,Lin Zhang,Maoshuai Li,Xinbin Ma
标识
DOI:10.1021/acs.iecr.2c04560
摘要
Nickel-based catalysts are the most promising selection for CO2 methanation. But, it is challenging for monometallic Ni to achieve high CO2 conversion at low temperature. This study develops ceria-supported bimetallic Ni–Ru catalysts that are highly efficient for low-temperature methanation. A small amount of Ru (0.2 wt %) addition to Ni enables the intermetal interaction, and enhances the dispersion of Ni particles with a more active surface, consequently boosting the catalytic capacity for hydrogen activation and CO adsorption. The bimetallic Ni–Ru catalysts exhibit a more than 3-fold rate enhancement at low temperature for selective methanation of CO2 relative to the monometallic Ni/CeO2. Operando IR spectroscopy identifies the formate route as the major reaction mechanism over the monometallic Ni, and the presence of Ru in the bimetallic catalysts can induce the *CO-intermediate mechanistic pathway, contributing to the enhanced production of methane.
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