Amorphous Silica Induced Loose CeO ₂ Clusters with Isolated Pt Atoms for Efficient Reverse‐Water Gas Shift Reaction

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.