Synergistically Enhanced Oxygen Evolution Reaction Catalysis for Multielement Transition-Metal Oxides
Synergistically Enhanced Oxygen Evolution Reaction Catalysis for Multielement Transition-Metal Oxides
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DOI：
10.1021/acsaem.8b00511
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发表时间：
2018-07
影响因子：
6.4
通讯作者：
I. Yamada;Akihiko Takamatsu;K. Asai;Hideo Ohzuku;T. Shirakawa;T. Uchimura;S. Kawaguchi;H. Tsukasaki;S. Mori;K. Wada;H. Ikeno;Shunsuke Yagi
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文献类型：
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作者：
I. Yamada;Akihiko Takamatsu;K. Asai;Hideo Ohzuku;T. Shirakawa;T. Uchimura;S. Kawaguchi;H. Tsukasaki;S. Mori;K. Wada;H. Ikeno;Shunsuke Yagi
过渡金属氧化物作为新型的析氧反应催化剂得到了广泛的研究。部分元素取代是提高催化性能的有效方法，多个元素之间的这种电子相互作用被称为协同效应。然而，诸如原子的随机排列和组成元素的模糊角色等严重问题阻碍了合理材料设计的理论研究。本文系统地研究了AA′ 3B 4 O 12型四元钙钛矿氧化物的OER活性，在该氧化物中，多个过渡金属离子位于不同的晶体学位置。电化学测试结果表明，四元钙钛矿型氧化物系列CaCu 3 B 4 O 12（B = Ti，V，Cr，Mn，Fe，Co）的OER催化活性均上级优于简单钙钛矿型CaBO 3。在CaCu_3B_4O_（12）中，B位过渡金属离子对CaBO_3的活性顺序为Fe ~（4+）> Co ~（4+）> Ti ~（4+），V ~（4+），Cr ~（4+），Mn ~（4+），表明B位过渡金属离子对CaBO_3的活性顺序为Fe ~（4+）> Co ~（4+）> Ti ~（4+），V ~（4+）> Cr ~（4+）> Mn ~（4+）。
Transition metal oxides have been extensively investigated as novel catalysts for oxygen evolution reaction (OER). Partial elemental substitutions are effective ways to increase catalytic performance and such electronic interactions between multiple elements are known as synergistic effects. However, serious issues such as random atomic arrangement and ambiguous roles of constituent elements humper theoretical investigations for rational materials design. Herein, we describe systematic study on OER activity of AA′3B4O12-type quadruple perovskite oxides, in which multiple transition metal ions are located at distinct crystallographic sites. Electrochemical measurements demonstrate that OER catalytic activities of quadruple perovskite oxide series, CaCu3B4O12 (B = Ti, V, Cr, Mn, Fe, and Co), are all superior to those of simple perovskite counterparts CaBO3. The order of activity of B-site transition metal ions for CaBO3 (Fe4+ > Co4+ ≫ Ti4+, V4+, Cr4+, Mn4+) is retained in CaCu3B4O12, indicating that B-site ...