2026-10-15T02:04:36Z https://www.scidb.cn/oai

10.57760/sciencedb.j00124.000go 2026-09-24T09:45:41Z

2026-09-24 Study on the Effect of K on the Performance of CoCu/ZrMgOx Catalyst for the RWGS Reaction doi:10.57760/sciencedb.j00124.000go en Abstract: A K-promoted CoCu/ZrMgOx catalyst was prepared via a sol-gel method. Characterizations including XRD, TEM, H2-D2 exchange experiments, and CO2/CO-TPD revealed that the introduction of K led to a slight increase in particle size, suppressed H2 dissociation, and facilitated CO desorption. In CO2 hydrogenation to CO (the reverse water–gas shift reaction, RWGS), the presence of the K promoter significantly inhibited methane formation and markedly enhanced CO selectivity. Under the condition 550ºC, the CO2 conversion and CO selectivity were 23.32% and 99.92%, respectively; the CO-STY reached 5361.14 g∙kgcat-1∙h-1, and the catalyst could operate stably for 120 h without significant deactivation. In situ DRIFTS results confirmed that CO formation predominantly follows a formate intermediate pathway. Although the K promoter did not alter the reaction pathway, it facilitated the rapid generation of HCOO* intermediates, thereby increasing the CO yield. Key words: reverse water-gas shift reaction; K promoter; H2 dissociation; CO adsorption 郑成成 Qin Lu Zhang Qian Qiu Li 王森 董梅 樊卫斌 PUBLIC https://creativecommons.org/publicdomain/zero/1.0/ dataset Science Data Bank