A general carbon monoxide-assisted strategy for synthesizing one-nanometer-thick Pt-based nanowires as effective electrocatalysts.,Journal of Colloid and Interface Science

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A general carbon monoxide-assisted strategy for synthesizing one-nanometer-thick Pt-based nanowires as effective electrocatalysts.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-03-24 , DOI: 10.1016/j.jcis.2020.03.083
Na Cheng ₁ , Ling Zhang ₁ , Yingjie Zhou ₁ , Shengwei Yu ₁ , Liyuan Chen ₁ , Haibo Jiang ₁ , Chunzhong Li ₁

Affiliation

To balance the Pt utilization and the durability is the key issue for developing Pt-based oxygen reduction reaction (ORR) catalysts, and constructing ultrathin one-dimensional (1D) structure provides a practical solution. Here, a facile CO-assisted strategy has been proposed for synthesizing PtFe nanowires (NWs) with an ultrathin diameter of one-nanometer and high aspect ratio for the first time, which demonstrates great universality and can be extended to a ternary system. The NWs are found to grow following an oriented attachment mechanism facilitated by the preferential adsorption and reducibility of CO. Based on composition regulation, PtFe NWs and PtFeCo NWs exhibit superior catalytic performance, of which the electrochemical active surface areas are extremely high, achieving 1.5 folds of that of Pt/C catalyst. Benefiting from the synergistic effect endowed by alloying and the ultrathin anisotropic structure, PtFe NWs and PtFeCo NWs show remarkable mass activity of 0.57 and 0.58 A mg-1Pt, respectively, and the durability also meet the 2020 standard of DOE, holding great application potential.

中文翻译：

一种一般的一氧化碳辅助策略，用于合成一纳米厚的基于Pt的纳米线作为有效的电催化剂。

平衡Pt的利用率和耐久性是开发基于Pt的氧还原反应（ORR）催化剂的关键问题，构建超薄一维（1D）结构提供了一种实用的解决方案。在此，首次提出了一种简便的CO辅助策略，用于合成超薄直径为1纳米，高纵横比的PtFe纳米线（NWs），这显示出很大的通用性并且可以扩展到三元体系。发现NW遵循定向吸附机制而生长，该定向附着机制受CO优先吸附和还原的促进。基于组成调节，PtFe NW和PtFeCo NW表现出优异的催化性能，其中电化学活性表面积非常高，达到1.5倍Pt / C催化剂的

更新日期：2020-03-26

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