FeNi Cubic Cage@N-Doped Carbon Coupled with N-Doped Graphene toward Efficient Electrochemical Water Oxidation

• DOI: 10.1021/acssuschemeng.8b00282
• Publication Date: 2018-05-18T22:43:32Z
• Authors: Xiao Zhang; Cheng Li; Tengfei Si; Heng Lei; Chengbo Wei; Yanfang Sun; Tianrong Zhan; Qingyun Liu; Jinxue Guo
• Keywords: Overpotential; Oxygen evolution; Nanocages; Prussian blue; Noble metal; Electrolysis of water

Oxygen evolution reaction (OER) is of great significance in electrochemical water splitting on industrial scale, which suffers from the slow kinetics and large overpotential, thus setting main obstacle for efficient electrolysis. To pursue cost-effective OER electrocatalysts with high activity durable stability, we here set a facile strategy to prepare N-doped graphene supported core–shell FeNi alloy@N-doped carbon nanocages (FeNi@NC-NG) by annealing oxides Prussian blue analogues under H2/Ar atmosphere. Based specific structural benefits, present catalyst shows superior catalytic than precious metal RuO2 Ir/C, low overpotential 270 mV 10 mA cm–2, as well stability. The simple synthesis process outstanding electrocatalytic performances show potential FeNi@NC-NG replace noble metal-based catalysts toward oxidation.