PdCo Alloy Nanonetworks−Polyallylamine Inorganic–Organic Nanohybrids toward the Oxygen Reduction Reaction,Advanced Materials Interfaces

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PdCo Alloy Nanonetworks−Polyallylamine Inorganic–Organic Nanohybrids toward the Oxygen Reduction Reaction
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2018-01-11 , DOI: 10.1002/admi.201701322
Guang-Rui Xu ₁ , Cong-Cong Han ₁ , Ying-Ying Zhu ₁ , Jing-Hui Zeng ₁ , Jia-Xing Jiang ₁ , Yu Chen ₁

Affiliation

Rationally controlling the morphology, chemical composition, and interfacial property of metal nanostructures can remarkably enhance their electrocatalytic performance, such as activity, selectivity, and durability. In this work, a facile functional molecule‐assisted cyanogel‐reduction method is developed to successfully synthesize the polyallylamine (PAA)‐functionalized PdCo alloy nanonetworks (PdCo‐NNW@PAA) inorganic–organic nanohybrids. The solid, double‐metal, and 3D backbone properties of jelly‐like K₂PdCl₄/K₃Co(CN)₆ cyanogel intermediate contribute to the high alloying degree and network structure of PdCo‐NNW@PAA nanohybrids. During the reduction, PAA molecules not only serve as surfactant to decrease the particle size but also act as functional molecule to modify the metal surface. The oxygen reduction reaction (ORR) polarization and chronoamperometry tests demonstrate that PdCo‐NNW@PAA nanohybrids have outstanding electrocatalytic activity, excellent resistance to alcohol crossover effect, and good durability toward the ORR in alkaline media. This work provides a new strategy for synthesizing the chemical functionalized multimetallic alloy nanonetworks at room temperature and reveals that the interfacial property of metal nanocrystals strongly affects their electrocatalytic activity and selectivity.

中文翻译：

PdCo合金纳米网络-聚烯丙胺无机-有机纳米杂化物对氧还原反应的影响

合理控制金属纳米结构的形态，化学组成和界面性质可以显着提高其电催化性能，例如活性，选择性和耐久性。在这项工作中，开发了一种简便的功能分子辅助的氰基凝胶还原方法，以成功合成聚烯丙胺（PAA）功能化的PdCo合金纳米网络（PdCo-NNW @ PAA）无机-有机纳米杂化体。果冻状K ₂ PdCl ₄ / K ₃ Co（CN）₆的固体，双金属和3D骨架性质氰基凝胶中间体有助于PdCo-NNW @ PAA纳米杂化物的高合金化程度和网络结构。在还原过程中，PAA分子不仅充当表面活性剂以减小粒径，而且还充当功能性分子以修饰金属表面。氧还原反应（ORR）极化和计时电流法测试表明，PdCo-NNW @ PAA纳米杂化物具有出色的电催化活性，优异的抗醇穿越作用以及在碱性介质中对ORR的良好耐久性。这项工作提供了一种在室温下合成化学官能化的多金属合金纳米网络的新策略，并揭示了金属纳米晶体的界面性质强烈影响其电催化活性和选择性。

更新日期：2018-01-11

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