Pengcheng Li, Xinran Cui, Yanlan Ke, Chengxiong Dang, Weiquan Cai
Lowering the temperature of the integrated CO 2 capture and reverse water–gas shift (ICCU-RWGS, typically above 650 °C) reaction presents great potential for addressing the current challenges of low CO 2 conversion, a lack of carbon balance, and severe sintering. Herein, we successfully achieved the ICCU-RWGS reaction at 550 °C using CeO 2 -modified NiIn-CaO catalysts. Systematic characterizations reveal that the incorporation of CeO 2 can modify the electronic structure of NiIn intermetallic compounds (IMCs), which weakens H 2 adsorption and dissociation relative to that of CO, thereby preventing further hydrogenation of CO to CH 4 . Additionally, CeO 2 not only exhibits a strong interaction with NiIn IMCs to stabilize particles but also serves as a physical barrier to inhibit structural degradation, thereby guaranteeing the high stability of the catalyst. Consequently, CO 2 conversion, CO selectivity, and carbon balance during the entire 50-cycle test remained stable at 94.6, 100, and 98.0%, respectively, and the CO 2 adsorption capacity decreased by only 21.5%.