Regulating the Interfacial Synergy of Ni/Ga2O3 for CO2 Hydrogenation toward the Reverse Water–Gas Shift Reaction

• DOI: 10.1021/acs.iecr.0c05495
• Publication Date: 2021-03-03T05:22:24Z
• Authors: Jin Gong; Mingyu Chu; Wenhao Guan; Yu Liu; Qixuan Zhong; Muhan Cao; Yong Xu
• Keywords: Methanation; Water-gas shift reaction; Atmospheric temperature range

The reverse water–gas shift (RWGS) reaction is a critical step for adjusting the CO/H2 ratio in crude syngas via CO2 hydrogenation chemical industry. Generally, conditioning of competitively occurs two different pathways at moderate temperature range (350–450 °C), such as RWGS (CO2 + H2 → CO H2O) and methanation 4H2 CH4 2H2O). In this study, we demonstrate that interfacial synergy Ni/Ga2O3 can boost selective to (CO selectivity >95%) 350–450 °C. Detailed investigations indicate interface significantly influences adsorption thus leads formation intermediates products. particular, *HCOO preferentially formed on Ni surface, which further hydrogenated into H2O. By contrast, favors with assistance H2. This study not only provides highly catalyst during but also promotes research surface modification catalysts enhanced activity selectivity.