Amorphous Silica Induced Loose CeO <sub>2</sub> Clusters with Isolated Pt Atoms for Efficient Reverse‐Water Gas Shift Reaction
Jiwei Lei, Zihe Wu, Daoping Ye, Yifan Feng, Yu Tian, Jin Niu, Chong Cheng, Yi Wang, Shuang Li, Changsheng Zhao
Abstract
Abstract Pt‐based catalysts exhibit extraordinary potential in reverse‐water gas shift (RWGS) reactions, but often fail to possess a high reaction rate and high durability at the same time under high temperature. Herein, we designed a SiO 2 ‐induced loose CeO 2 as an effective capture for Pt atoms. The abundant surface O vacancies in the loose CeO 2 can trigger significant electron transfer from Pt to CeO 2 and play a crucial role in stabilizing Pt atoms, therefore, largely improving its thermal stability. The as‐synthesized Pt‐aCeO 2 @SiO 2 catalyst possesses a record CO production rate of 7672.7 mol CO mol Pt −1 h −1 with CO selectivity > 97% at 400 °C surpass most of the reported Pt‐based catalysts. More importantly, over 90% of the initial activity of the catalyst remains after 200 h constant operation at 400 °C, verifying the improved durability of Pt atoms under high temperature. Our investigation proposes a method of inducing the formation of defect‐rich active supports through amorphous substrates, providing new thinking for designing atomic catalysts with good stability under high temperatures.