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In Situ Modulation of A-Site Vacancies in LaMnO3.15 Perovskite for Surface Lattice Oxygen Activation and Boosted Redox Reactions.
Liu, Xiaoqing; Mi, Jinxing; Shi, Lin; Liu, Haiyan; Liu, Jun; Ding, Yun; Shi, Jianqiang; He, Minghua; Wang, Zisha; Xiong, Shangchao; Zhang, Qinfang; Liu, Yuefeng; Wu, Zhong-Shuai; Chen, Jianjun; Li, Junhua.
Afiliación
  • Liu X; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Mi J; School of Environment and Safety Engineering, North University of China, 030051, Taiyuan, China.
  • Shi L; State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023, Dalian, China.
  • Liu H; School of Materials Science and Engineering, Yancheng Institute of Technology, 224051, Yancheng, China.
  • Liu J; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Ding Y; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Shi J; College of chemistry and chemical engineering, Taiyuan University of Technology, 030051, Taiyuan, China.
  • He M; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Wang Z; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Xiong S; College of chemistry and chemical engineering, Taiyuan University of Technology, 030051, Taiyuan, China.
  • Zhang Q; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Liu Y; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Wu ZS; School of Environment and Safety Engineering, North University of China, 030051, Taiyuan, China.
  • Chen J; State Key Joint Laboratory of Environment Simulation and Pollution Control, National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, 100084, Beijing, China.
  • Li J; School of Materials Science and Engineering, Yancheng Institute of Technology, 224051, Yancheng, China.
Angew Chem Int Ed Engl ; 60(51): 26747-26754, 2021 Dec 13.
Article en En | MEDLINE | ID: mdl-34665490
ABSTRACT
Modulation of A-site defects is crucial to the redox reactions on ABO3 perovskites for both clean air application and electrochemical energy storage. Herein we report a scalable one-pot strategy for in situ regulation of La vacancies (VLa ) in LaMnO3.15 by simply introducing urea in the traditional citrate process, and further reveal the fundamental relationship between VLa creation and surface lattice oxygen (Olatt ) activation. The underlying mechanism is shortened Mn-O bonds, decreased orbital ordering, promoted MnO6 bending vibration and weakened Jahn-Teller distortion, ultimately realizing enhanced Mn-3d and O-2p orbital hybridization. The LaMnO3.15 with optimized VLa exhibits order of magnitude increase in toluene oxidation and ca. 0.05 V versus RHE (reversible hydrogen electrode) increase of half-wave potential in oxygen reduction reaction (ORR). The reported strategy can benefit the development of novel defect-meditated perovskites in both heterocatalysis and electrocatalysis.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2021 Tipo del documento: Article País de afiliación: China
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2021 Tipo del documento: Article País de afiliación: China