金属间化合物
催化作用
合金
氧还原反应
材料科学
过渡金属
铂金
化学工程
金属
工作(物理)
组合化学
纳米技术
化学
冶金
物理化学
热力学
电极
有机化学
电化学
物理
工程类
作者
Siyuan Zhu,Liting Yang,Jingsen Bai,Yuyi Chu,Jie Liu,Jianmin Zhao,Changpeng Liu,Junjie Ge,Xing Wang
出处
期刊:Nano Research
[Springer Nature]
日期:2022-09-22
卷期号:16 (2): 2035-2040
被引量:12
标识
DOI:10.1007/s12274-022-4868-3
摘要
Designing feasible electrocatalysts towards oxygen reduction reaction (ORR) requires advancement in both activity and stability, where attaining high stability is of extreme importance as the catalysts are expected to work efficiently under frequent startup/shut down circumstances for at least several thousand hours. Alloying platinum with early transition metals (i.e., Pt—La alloy) is revealed as efficient catalysts construction strategy to potentially satisfy these demands. Here we report a Pt5La intermetallic compound synthesized by a novel and facile strategy. Due to the strong electronic interactions between Pt and La, the resultant Pt5La alloy catalyst exhibits enhanced activity with half wave of 0.92 V and mass activity of 0.49 A·mgPt−1, which strictly follows the 4e transfer pathway. More importantly, the catalyst performs superior stability during 30,000 cycles of accelerated stressed test (AST) with mass activity retention of 93.9%. This study provides new opportunities for future applications of Pt-rare earth metal alloy with excellent electrocatalytic properties.
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