SmFeO3 and SmFe1‐xErxO3 based perovskite nanorods for improved oxygen and hydrogen evolution functions,International Journal of Energy Research

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SmFeO3 and SmFe1‐xErxO3 based perovskite nanorods for improved oxygen and hydrogen evolution functions
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-12-01 , DOI: 10.1002/er.6049
P. Ilanchezhiyan _{1,

2} , G. Mohan Kumar _{1,

2} , C. Siva ₃ , T.W. Kang _{1,

2} , D.Y. Kim _{1,

2}

Affiliation

Samarium (Sm) based perovskite nanorod‐like structures were processed for electrocatalytic functions involving oxygen and hydrogen evolution reactions. Influence of erbium (Er) ions on the structural and electrocatalytic properties of SmFe_1−xEr_xO₃ perovskites were studied under varied alkaline pH (8.5‐14) conditions. The rod‐like dimensional analysis was obtained through scanning/transmission electron microscopes. Diffraction signals affirmed the presence of samarium oxide (Sm₂O₃) traces in processed perovskites. X‐ray photoelectron spectroscopy data signified the presence of corresponding oxides and determined the valence state of Sm, Er and Fe ions. Er ions were found to boost the production of oxygen and hydrogen molecules. The anodic overpotential values improved from 216 mV to 184 mV, while cathodic overpotential values improved from 231 mV to 213 mV upon Er inclusion. Electrocatalytic results approved SmFe_1−xEr_xO₃ as a promising oxygen/hydrogen liberating electrocatalyst with remarkable stability and Tafel slopes that improved from 96 to 77 mV/dec and 78 to 55 mV/dec upon Er incorporation in host perovskite.

中文翻译：

基于SmFeO3和SmFe1-xErxO3的钙钛矿纳米棒可改善氧气和氢气的释放功能

基于（Sm）的钙钛矿纳米棒状结构进行了电催化功能的处理，涉及氧和氢的逸出反应。在不同的碱性pH（8.5-14）条件下，研究了₋离子对SmFe _1-x Er _x O ₃钙钛矿结构和电催化性能的影响。棒状尺寸分析是通过扫描/透射电子显微镜获得的。衍射信号确认了mar氧化物（Sm ₂ O ₃）中的痕量钙钛矿。X射线光电子能谱数据表明存在相应的氧化物，并确定了Sm，Er和Fe离子的化合价态。发现离子可促进氧气和氢气分子的产生。掺入Er时，阳极过电势值从216 mV提高到184 mV，而阴极过电势值从231 mV提高到213 mV。电催化结果证明SmFe _1-x Er _x O ₃是一种有希望的释放氧/氢的电催化剂，具有显着的稳定性和Tafel斜率，当Er掺入主体钙钛矿中时，Tafel斜率从96到77 mV / dec和从78到55 mV / dec改善。

更新日期：2021-02-01

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