Baodui Chai, Lingling Miao, Na Zhao, Yangshuai Cheng, Han Zhang, Wei Wang
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引用次数: 0
摘要
铂基催化剂因其卓越的催化活性而在乙二醇氧化反应（EGOR）中大有可为，但贵金属的高成本、低储量和低稳定性极大地限制了其进一步的大规模应用。开发低铂和高性能阳极电催化剂是乙二醇燃料电池直接化的当务之急。目前，一种用于乙二醇燃料电池的铂钯镍钴镍高熵合金（HEA）已经研制成功，并通过电化学和物理方法验证了其催化性能。值得注意的是，PtPdNiCoBi/C（0.782 A mg-1PtPd）上的 EGOR 峰值电流密度达到 Pt/C（0.221 A mg-1Pt）的 3.54 倍，PtPdNiCoBi/C（0.此外，它在 500 次循环后的电流密度保持率（84.0%）也优于 Pt/C（78.8%）。这项工作将为未来燃料电池中 HEA 催化剂的实际应用提供支持。
An Effective Carbon-Supported High-Entropy-Alloy Catalyst of PtPdNiCoBi for Ethylene Glycol Electrooxidation
The Pt-based catalysts are quite promising for ethylene glycol oxidation reaction (EGOR) due to their superior catalytic activity and their high cost, low reserves and poor stability of precious metals greatly limit the further large-scale application. Developing low-Pt and high-performance anode electrocatalysts is urgent to direct ethylene glycol fuel cells. At present, a high-entropy alloy (HEA) of PtPdNiCoBi/C has been developed for EGOR, and its catalytic performance has been verified by electrochemical and physical methods. Notably, the EGOR peak current density on PtPdNiCoBi/C (0.782 A mg−1PtPd) reaches 3.54 times of Pt/C (0.221 A mg−1Pt), and the residual current on PtPdNiCoBi/C (0.092 A mg−1PtPd) is superior to that of Pt/C (0.076 A mg−1Pt) after 3000 s. Moreover, the current density retention (84.0%) of it after 500 cycles, is also superior to that of the Pt/C (78.8%). This work would support the future practical use of HEA catalyst for fuel cells.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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