Low-temperature Water-gas Shift Reaction Enhanced by Oxygen Vacancies in Pt-loaded Porous Single-crystalline Oxide Monoliths

作     者：Dr. Shaobo Xi Jie Zhang Prof. Dr. Kui Xie 

作者机构：Key Laboratory of Optoelectronic Materials Chemistry and Physics Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou Fujian 350108 China Key Laboratory of Design & Assembly of Functional Nanostructures Chinese Academy of Sciences Fuzhou Fujian 350002 China 

出 版 物：《Angewandte Chemie》 (应用化学)

年 卷 期：2022年第134卷第39期

页      面：e202209851-e202209851页

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

主　　题：Oxygen Vacancy Porous Single Crystal Pt Clusters Interfaces Water-Gas Shift Reaction 

摘      要：Water-gas shift (WGS) reaction at low temperature plays an important role in hydrogen production from fossil fuels and hydrogen purification for proton-exchange membrane fuel cells. However, the activation of H 2 O is a critical reaction step that greatly limits the overall performance during WGS reaction. Here we fabricate porous single-crystalline (PSC) MoO 3 monoliths at 1 cm scale and deposit atomic-layered Pt clusters at the lattice surface to create the interfacial system toward the low-temperature WGS reaction. The single-crystalline nature stabilizes the oxygen vacancies (V O ) at lattice and facilitates the effective activation of H 2 O at the interface. We show the highest Pt-normalized activity of 0.86 mol CO mol Pt −1 s −1 for the ultra-low temperature WGS reaction at 120 °C. The single-crystalline features with enhanced fluxion in porous architectures lead to outstanding performance without visible degradation even after continuous operation for 100 hours.