AMnO3 (A = Sr, La, Ca, Y) Perovskite Oxides as Oxygen Reduction Electrocatalysts
AMnO3 (A = Sr, La, Ca, Y) Perovskite Oxides as Oxygen Reduction Electrocatalysts
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DOI：
10.1007/s11244-018-0886-5
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发表时间：
2018-04-01
影响因子：
3.6
通讯作者：
Fermin, D. J.
中科院分区：
文献类型：
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作者：
Celorrio, V.;Calvillo, L.;Fermin, D. J.
研究了一系列钙钛矿型锰氧化物AMnO（3）（A = Sr，La，Ca和Y）颗粒作为氧还原反应的电催化剂。采用离子液体法合成了AMnO（3）材料，在不同温度下得到了纯相颗粒。取决于煅烧温度，获得平均直径在20和150 nm之间的颗粒。通过X射线光电子能谱和扩展的X射线吸收精细结构探测了体与表面的组成和结构。在碱性环境中对碳-氧化物复合电极进行了电化学研究。从Mn的有效氧化态、A：Mn比表面积和Mn-O间距等方面讨论了催化剂的电催化活性。
A series of perovskite-type manganites AMnO(3) (A = Sr, La, Ca and Y) particles were investigated as electrocatalysts for the oxygen reduction reaction. AMnO(3) materials were synthesized by means of an ionic-liquid method, yielding phase pure particles at different temperatures. Depending on the calcination temperature, particles with mean diameter between 20 and 150 nm were obtained. Bulk versus surface composition and structure are probed by X-ray photoelectron spectroscopy and extended X-ray absorption fine structure. Electrochemical studies were performed on composite carbon-oxide electrodes in alkaline environment. The electrocatalytic activity is discussed in terms of the effective Mn oxidation state, A:Mn particle surface ratio and the Mn-O distances.