期刊
NANO RESEARCH
卷 11, 期 9, 页码 4796-4805出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-018-2065-1
关键词
iron-rich; perovskite; oxygen evolution reaction; energy storage and conversion; molten salt
类别
资金
- National Natural Science Foundation of China [11305250, 11575280]
- Joint Funds of the National Natural Science Foundation of China [U1232117]
- Key Project of Science and Technology of Shanghai [15DZ1200100]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2014237, 2015212]
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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