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Efficient Ni‐based catalysts for low‐temperature reverse water‐gas shift (RWGS) reaction
Author(s) -
Deng Lidan,
Ai Xin,
Xie Fengqiong,
Zhou Guilin
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202100100
Subject(s) - bimetallic strip , water gas shift reaction , catalysis , selectivity , syngas , x ray photoelectron spectroscopy , chemistry , temperature programmed reduction , dispersion (optics) , inorganic chemistry , chemical engineering , materials science , nuclear chemistry , organic chemistry , physics , optics , engineering
CO 2 hydrogenation for syngas can alleviate the pressure of un‐controlled emissions of CO 2 and bring enormous economic benefits. Advantageous Ni‐catalysts have good CO 2 hydrogenation activity and high CO selectivity merely over 700 °C. Herein, we introduced Cu into Ni catalysts, which were evaluated by H 2 ‐TPR, XRD, BET, in‐situ XPS and CO 2 ‐TPD, and their CO 2 hydrogenation activity and CO selectivity were significantly affected by the Ni/Cu ratios, which was rationalized by the synergistic effect of bimetallic catalysts. In addition, the reduction temperatures of studied catalysts apparently affected the CO 2 hydrogenation, which were caused by the number and dispersion of the active species. It's found that the Ni 1 Cu 1 ‐400 had good stability, high CO selectivity (up to 90%), and fast formation rate (1.81×10 −5 mol/g cat /s) at 400 °C, which demonstrated a good potential as a superior catalyst for reverse water‐gas shift (RWGS) reaction.