Hierarchically Fractal PtPdCu Sponges and their Directed Mass- and Electron-Transfer Effects,Nano Letters

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Hierarchically Fractal PtPdCu Sponges and their Directed Mass- and Electron-Transfer Effects
Nano Letters ( IF 9.6 ) Pub Date : 2021-07-28 , DOI: 10.1021/acs.nanolett.1c02268
Yu-Xuan Xiao ₁ , Jie Ying ₂ , Ge Tian ₁ , Xiong Yang ₁ , Yue-Xing Zhang ₃ , Jiang-Bo Chen ₁ , Yong Wang ₁ , Mark D Symes ₄ , Kenneth I Ozoemena ₅ , Jinsong Wu ₁ , Xiao-Yu Yang _{1,

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Affiliation

Fractal Pt-based materials with hierarchical structures and high self-similarity have attracted more and more attention due to their bioinspiring maximum optimization of energy utilization and mass transfer. However, their high-efficiency design of the mass- and electron-transfer still remains to be a great challenge. Herein, fractal PtPdCu hollow sponges (denoted as PtPdCu-HS) facilitating both directed mass- and electron-transfer are presented. Such directed transfer effects greatly promote electrocatalytic activity, regarded as 3.9 times the mass activity, 7.3 times the specific activity, higher poison tolerance, and higher stability than commercial Pt/C for the methanol oxidation reaction (MOR). A new “directed mass- and electron-transfer” concept, characteristics, and mechanism are proposed at the micro/nanoscale to clarify the structural design and functional enhancement of fractal electrocatalyst. This work displays new possibilities for designing novel nanomaterials with high activity and superior stability toward electrocatalysis or other practical applications.

中文翻译：

分级分形 PtPdCu 海绵及其定向传质和电子传递效应

具有层次结构和高度自相似性的分形 Pt 基材料因其对能量利用和传质的生物启发性最大化优化而受到越来越多的关注。然而，他们对质量和电子转移的高效设计仍然是一个巨大的挑战。在此，分形 PtPdCu 中空海绵（表示为 PtPdCu-HS）有助于定向质量和电子转移。这种定向转移效应极大地促进了电催化活性，被认为是质量活性的 3.9 倍，比活性的 7.3 倍，比商业 Pt/C 的甲醇氧化反应 (MOR) 具有更高的耐毒性和更高的稳定性。一种新的“定向质量和电子转移”概念、特性、在微/纳米尺度上提出和机制，以阐明分形电催化剂的结构设计和功能增强。这项工作为设计对电催化或其他实际应用具有高活性和优异稳定性的新型纳米材料提供了新的可能性。

更新日期：2021-09-22

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