Accelerating Reverse Water Gas Shift Reaction through Synergistic CO 2 and H 2 Activation on Ru–Fe–(V O -in-CeO 2 ) Ternary Catalytic Centers

作者：Haoyang Jiang, Linyu Wang, Chuanhao Wang, Yi Xie, Caijuan Shi, Yongcheng Xiao, Yueren Liu, Weiping Ding, Miao Zhong · 发表于：Nano Letters · 年份：2025 · DOI：10.1021/acs.nanolett.4c06427 · 被引用次数：20 · 研究领域：Catalytic Processes in Materials Science、Catalysts for Methane Reforming、Catalysis and Oxidation Reactions

The reverse water gas shift (RWGS) reaction shows promise for converting CO 2 emissions to chemical feedstocks using renewable H 2 . However, achieving high selectivity and activity at low temperatures remains challenging due to the thermodynamically more favorable CO 2 methanation reaction. Here we develop a robust Ru 0.0025 Ce 0.7 Fe 0.3 O 2−δ solid-solution nanorod catalyst featuring a ternary Fe–Ru–oxygen vacancy (V O ) center, overcoming limitations in intermediate adsorption and dissociation on single-component catalysts. Incorporating a trace amount of Ru (0.25 at. %) into Ce 0.7 Fe 0.3 O 2−δ markedly enhances CO 2 and H 2 dissociation and H 2 O formation, while the primary Ce 0.7 Fe 0.3 O 2−δ solid-solution component facilitates CO desorption, lowering the RWGS onset temperature to ∼200 °C. Experimental and computational analyses verify improved kinetics and stable performance with Ru 0.0025 Ce 0.7 Fe 0.3 O 2−δ, yielding a CO production rate of 326 mmol g cat –1 h –1, ∼100% selectivity, and a 21% yield, approaching the thermodynamic limit within a 5 min batch reaction at ∼450 °C surface temperature under 300 W xenon lamp illumination.