Molten-salt synthesis of porous La0.6Sr0.4Co0.2Fe0.8O2.9 perovskite as an efficient electrocatalyst for oxygen evolution
Molten-salt synthesis of porous La0.6Sr0.4Co0.2Fe0.8O2.9 perovskite as an efficient electrocatalyst for oxygen evolution
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熔盐合成多孔La0.6Sr0.4Co0.2Fe0.8O2.9钙钛矿作为高效析氧电催化剂
DOI：
10.1007/s12274-018-2065-1
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发表时间：
2018-04
期刊：
影响因子：
9.9
通讯作者：
Wang Jian-Qiang
中科院分区：
文献类型：
--
作者：
Song Sanzhao;Zhou Jing;Zhang Shuo;Zhang Linjuan;Li Jiong;Wang Yu;Han Ling;Long Youwen;Hu Zhiwei;Wang Jian-Qiang
通过生态高效途径开发用于析氧反应（OER）的高效且低成本的电催化剂对于整体水裂解是期望的，尽管具有挑战性的结果。在此，富铁的La0.6Sr0.4Co0.2Fe0.8O2.9（LSCF 28）钙钛矿具有开放的多孔地形结构的开发作为电催化剂通过一个简单的熔盐合成方法。结果发现，孔隙度与铁含量和熔盐的方法。得益于大的比表面积、多孔内表面的高活性以及氧化还原位点的最佳电子构型，这种廉价的材料表现出高性能，在0.1 M KOH中在0.345 V的低过电位下具有40.8 A·g-1的大质量活性，超过了最先进的贵金属IrO 2催化剂和其他众所周知的钙钛矿催化剂，例如Ba0.5Sr0.5Co0.8Fe0.2O3和SrCoO2.7。我们的工作表明熔盐法是在钙钛矿氧化物中制备多孔结构的有效途径，这对于能量转换和存储器件是重要的。
The development of an efficient and low-cost electrocatalyst for the oxygen evolution reaction (OER) via an eco-efficient route is a desirable, although challenging, outcome for overall water splitting. Herein, an iron-rich La0.6Sr0.4Co0.2Fe0.8O2.9 (LSCF28) perovskite with an open porous topographic structure was developed as an electrocatalyst by a straightforward molten-salt synthesis approach. It was found that porosity correlates with both the iron content and the molten-salt approach. Benefiting from the large surface area, high activity of the porous internal surface, and the optimal electronic configuration of redox sites, this inexpensive material exhibits high performance with a large mass activity of 40.8 A·g–1 at a low overpotential of 0.345 V in 0.1 M KOH, surpassing the state-of-the-art precious metal IrO2 catalyst and other well-known perovskites, such as Ba0.5Sr0.5Co0.8Fe0.2O3 and SrCoO2.7. Our work illustrates that the molten-salt method is an effective route to generate porous structures in perovskite oxides, which is important for energy conversion and storage devices.
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