Ultrathin PtNiM (M = Rh, Os, and Ir) Nanowires as Efficient Fuel Oxidation Electrocatalytic Materials

Advanced Materials
Weiyu ZhangShaojun Guo

Abstract

The development of new electrocatalysts with high activity and durability for alcohol oxidation is an emerging need of direct alcohol fuel cells. However, the commonly used Pt-based catalysts still exhibit drawbacks including limited catalytic activity, high overpotential, and severe CO poisoning. Here a general approach is reported for preparing ultrathin PtNiM (M = Rh, Os, and Ir) nanowires (NWs) with excellent anti-CO-poisoning ability and high activity. Owing to their superior nanostructure and optimal electronic interaction, the ultrathin PtNiM NWs show enhanced electrocatalytic performance for both methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). The optimal PtNiRh NWs show mass activity of 1.72 A mg-1 and specific activity of 2.49 mA cm-2 for MOR, which are 3.17 and 2.79 times higher than those of Pt/C. In particular, the onset potentials of PtNiRh NWs for MOR and EOR shift down by about 65 and 85 mV compared with those of Pt/C. Density functional theory calculations further verify their high antipoison properties for MOR and EOR from both an electronic and energetic perspective. Facilitated by the introduction of Rh and Ni, the stable pinning of the Pt 5d band associated with electron-rich and dep...Continue Reading

References

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Jul 18, 2014·Journal of the American Chemical Society·Wenxin DuXiaowei Teng
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Dec 29, 2017·Journal of the American Chemical Society·Liang HuangShaojun Dong

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Citations

May 30, 2019·Nanoscale·Hengjia WangChengzhou Zhu
May 18, 2021·Chemical Science·Menglei YuanGuangjin Zhang
Nov 12, 2020·ACS Applied Materials & Interfaces·Hengjia WangChengzhou Zhu
Sep 4, 2021·Nature Communications·Zhiqi ZhangFrancesco Ciucci
Nov 18, 2021·Chemistry : a European Journal·Zhiping ZhengZhaoxiong Xie

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