A universal chemical-induced tensile strain tuning strategy to boost oxygen-evolving electrocatalysis on perovskite oxides

被引:126
作者
Guan, Daqin [1 ]
Zhong, Jian [1 ]
Xu, Hengyue [2 ]
Huang, Yu-Cheng [3 ]
Hu, Zhiwei [4 ]
Chen, Bin [5 ]
Zhang, Yuan [5 ]
Ni, Meng [6 ,7 ]
Xu, Xiaomin [8 ]
Zhou, Wei [1 ]
Shao, Zongping [1 ,8 ]
机构
[1] Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211800, Peoples R China
[2] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, State Key Lab Chem Oncogen, Shenzhen 518055, Peoples R China
[3] Tamkang Univ, Dept Phys, 151 Yingzhuan Rd, New Taipei 151, Taiwan
[4] Max Planck Inst Chem Phys Solids, Nothnitzer Str 40, D-01187 Dresden, Germany
[5] Shenzhen Univ, Inst Deep Earth Sci & Green Energy, Guangdong Prov Key Lab Deep Earth Sci & Geotherma, Shenzhen 518060, Peoples R China
[6] Hong Kong Polytech Univ, Res Inst Sustainable Urban Dev RISUD, Dept Bldg & Real Estate, Hung Hom,Kowloon, Hong Kong 999077, Peoples R China
[7] Hong Kong Polytech Univ, Res Inst Smart Energy RISE, Hung Hom, Kowloon, Hong Kong 999077, Peoples R China
[8] Curtin Univ, WA Sch Mines Minerals Energy & Chem Engn WASM MEC, Perth, WA 6102, Australia
基金
中国国家自然科学基金;
关键词
EVOLUTION REACTION; SPIN-STATE; OXIDATION; STABILITY; NANOPARTICLES; LA1-XSRXCOO3; TRANSITION; ADSORPTION; OCTAHEDRA; CATALYSIS;
D O I
10.1063/5.0083059
中图分类号
O59 [应用物理学];
学科分类号
摘要
Exploring effective, facile, and universal tuning strategies to optimize material physicochemical properties and catalysis processes is critical for many sustainable energy systems, but still challenging. Herein, we succeed to introduce tensile strain into various perovskites via a facile thermochemical reduction method, which can greatly improve material performance for the bottleneck oxygen-evolving reaction in water electrolysis. As an ideal proof-of-concept, such a chemical-induced tensile strain turns hydrophobic Ba5Co4.17Fe0.83O14-delta perovskite into the hydrophilic one by modulating its solid-liquid tension, contributing to its beneficial adsorption of important hydroxyl reactants as evidenced by fast operando spectroscopy. Both surface-sensitive and bulk-sensitive absorption spectra show that this strategy introduces oxygen vacancies into the saturated face-sharing Co-O motifs of Ba5Co4.17Fe0.83O14-delta and transforms such local structures into the unsaturated edge-sharing units with positive charges and enlarged electrochemical active areas, creating a molecular-level hydroxyl pool. Theoretical computations reveal that this strategy well reduces the thermodynamic energy barrier for hydroxyl adsorption, lowers the electronic work function, and optimizes the charge/electrostatic potential distribution to facilitate the electron transport between active sites and hydroxyl reactants. Also, this strategy is reliable for other single, double, and Ruddlesden-Popper perovskites. We believe that this finding will enlighten rational material design and in-depth understanding for many potential applications. Published under an exclusive license by AIP Publishing.
引用
收藏
页数:12
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