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论文类型：期刊论文

发表时间：2020-01-20

发表刊物：ELECTROCHIMICA ACTA

收录刊物：EI、SCIE

卷号：331

ISSN号：0013-4686

关键字：Oxygen reduction and evolution reaction; FeNi alloy nanoparticles; N-doped carbon electrocatalyst; Surfactant and soft template

摘要：The sluggish kinetics of oxygen reduction reaction and oxygen evolution reaction (ORR/OER) are the key scientific issues that need to be addressed for the application of renewable energy technologies. Rational coupling transition metal with porous heteroatom-doped carbon is extensively investigated as an efficient strategy to achieve high performance ORR/OER nonprecious metal electocatalysts. In this study, a FeNi alloy coated with N-doped carbon material (namely FeNi/NC) was designed by using triblock copolymer Pluronic F127 as a surfactant co-assembly with g-C3N4. This strategy enabled FeNi/NC possessing a high BET surface area in terms of three-dimensional hierarchical porous structure together with abundant defect sites. The optimized FeNi/NC catalyst displays an excellent oxygen electrode electro-catalytic activity with a potential gap Delta E of 0.77 V in alkaline media which substantially outperformed benchmark Pt/C + RuO2 (Delta E = 0.80 V). Furthermore, it shows almost no decay after long-time cycling tests for ORR/OER. The excellent catalytic performance along with the low cost for FeNi/NC catalyst makes it possible to commercialize the renewable energy devices. (c) 2019 Elsevier Ltd. All rights reserved.