催化作用
选择性
甲烷化
吸附
碳纳米管
化学
无机化学
水煤气变换反应
碳纤维
氮气
化学工程
材料科学
纳米技术
物理化学
有机化学
复合数
工程类
复合材料
作者
Dongdong Wang,Zhenxuan Yuan,Xi‐Lin Wu,Wei Xiong,Jieqiong Ding,Zhenhua Zhang,Weixin Huang
标识
DOI:10.1021/acscatal.3c00767
摘要
Developing efficient non-precious-metal catalysts capable of selectively converting CO2 into fuels and chemicals is desirable yet remains a challenge. Ni-based catalysts usually exhibit high activity in methanation reactions but low selectivity and stability in the reverse water-gas shift (RWGS) reaction. Herein, we report a Ni single-atom catalyst with Ni–Nx motifs confined in N-doped carbon nanotubes as an active, selective, and stable catalyst for the RWGS reaction, achieving almost 100% CO selectivity with a STY of 1.88 molCO gNi–1 h–1 at 500 °C and atmospheric pressure. In addition to weak CO adsorption, strong CO2 adsorption and weak H2 adsorption at the Ni–Nx active site were found to be responsible for the high catalytic activity and CO selectivity.
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