塔菲尔方程
普鲁士蓝
催化作用
双功能
析氧
化学工程
纳米颗粒
材料科学
电化学
电催化剂
无机化学
碳纤维
化学
电池(电)
电极
合金
纳米技术
冶金
复合数
复合材料
有机化学
量子力学
功率(物理)
物理化学
工程类
物理
作者
Pingwei Cai,Suqin Ci,Erhuan Zhang,Ping Shao,Changsheng Cao,Zhenhai Wen
标识
DOI:10.1016/j.electacta.2016.10.070
摘要
Highly electrocatalytic activity and strong stability towards both oxygen evolution (OER) and oxygen reduction reaction (ORR) have been regarded as the critical factors in widespread application for the renewable energy technologies. It still remains a huge challenge for developing bifunctional catalysts with low cost, efficiently electrocatalytic activity and strong stability. In this paper, FeCo alloy nanoparticles embedded in nitrogen-doped carbon are synthesized through a simple thermal decomposition of Co-Fe Prussian Blue Analogue (Co-Fe PBA) in Ar atmosphere, during which the organic ligand of CN− in Co-Fe PBA provides both carbon and nitrogen sources for forming nitrogen-doped carbon and FeCo alloy nanoparticles were formed, and thus producing a core-shell structure ([email protected]). According to a set of electrochemical tests, the obtained [email protected] can function as a Janus to drive OER and ORR with desirable activities and stabilities in alkaline media. Specifically, the [email protected] presents an onset-potential of 1.45 V, a potential of 1.49 V at 10 mA cm−2, a Tafel slope of 62 mV dec−1 as OER catalyst, and an onset potential of 0.94 V, a half-wave potential of 0.8 V as ORR catalyst. The performance is comparable to those of precious metal based electrocatalysts, making it possible for potential application in the renewable energy devices, especially Zn-air battery.
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