Strain‐Induced Orbital Contributions to Oxygen Electrocatalysis in Transition‐Metal Perovskites
Strain‐Induced Orbital Contributions to Oxygen Electrocatalysis in Transition‐Metal Perovskites
复制标题
应变诱导轨道对转变中氧电催化的贡献金属钙钛矿
DOI:
10.1002/aenm.202102175
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发表时间:
2021
影响因子:
27.8
通讯作者:
Martin, Lane W.
中科院分区:
文献类型:
--
作者:
Fernandez, Abel;Caretta, Lucas;Das, Sujit;Klewe, Christoph;Lou, Djamila;Parsonnet, Eric;Gao, Ran;Luo, Aileen;Shafer, Padraic;Martin, Lane W.
Epitaxial strain has been shown to produce dramatic changes to the orbital structure in transition metal perovskite oxides and, in turn, the rate of oxygen electrocatalysis therein. Here, epitaxial strain is used to investigate the relationship between surface electronic structure and oxygen electrocatalysis in prototypical fuel cell cathode systems. Combining high‐temperature electrical‐conductivity‐relaxation studies and synchrotron‐based X‐ray absorption spectroscopy studies of La0.5Sr0.5CoO3and La0.8Sr0.2Co0.2Fe0.8O3thin films under varying degrees of epitaxial strain reveals a strong correlation between orbital structure and catalysis rates. In both systems, films under biaxial tensile strain simultaneously exhibit the fastest reaction kinetics and lowest electron occupation in thedz2orbitals. These results are discussed in the context of broader chemical trends and electronic descriptors are proposed for oxygen electrocatalysis in transition metal perovskite oxides.
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影响因子:
3.7
作者:
P. Rogge;R. Green;P. Shafer;G. Fabbris;A. Barbour;Benjamin M. Lefler;E. Arenholz;M. Dean;S. May
通讯作者:
S. May
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
G. Laan
通讯作者:
G. Laan
影响因子:
3.7
作者:
Merz, M.;Nagel, P.;Schuppler, S.
通讯作者:
Schuppler, S.
影响因子:
8.6
作者:
Thole;van der Laan G
通讯作者:
van der Laan G