One-pot synthesis of Ag-rich AgPd alloy nanoactiniae and their enhanced electrocatalytic activity toward oxygen reduction

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英文篇名：One-pot synthesis of Ag-rich AgPd alloy nanoactiniae and their enhanced electrocatalytic activity toward oxygen reduction 作者：Xiaoyu ; Qiu ; Xiaohong ; Yan ; Ke ; Cen ; Huaifang ; Zhang ; Geng ; Gao ; Liangjun ; Wu ; Dongmei ; Sun ; Yawen ; Tang 英文作者：Xiaoyu Qiu;Xiaohong Yan;Ke Cen;Huaifang Zhang;Geng Gao;Liangjun Wu;Dongmei Sun;Yawen Tang;Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University;Nanjing No.1 Middle School;Liyang Middle School of Jiangsu Province; 英文关键词：Ag-rich alloy;;Ag_9Pd_1;;Hydrothermal synthesis;;Ligand and ensemble effects;;Oxygen reduction reaction 中文刊名：TRQZ 英文刊名：能源化学(英文版) 机构：Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University;Nanjing No.1 Middle School;Liyang Middle School of Jiangsu Province; 出版日期：2019-01-15 出版单位：Journal of Energy Chemistry 年：2019 期：v.28 基金：sponsored by the National Natural Science Foundation of China (21576139, 21503111);; the Natural Science Foundation of Jiangsu Province (BK20171473);; the National and Local Joint Engineering Research Center of Biomedical Functional Materials, Natural Science Foundation of Jiangsu Higher Education Institutions of China (16KJB150020);; a project sponsored by the Priority Academic Program Development of Jiangsu Higher Education Institutions 语种：英文; 页：TRQZ201901015 页数：7 CN：01 ISSN：10-1287/O6 分类号：119-125

摘要

The electro-catalytic properties can be effectively optimized by designing bimetallic alloy nanoparticles with high-content less-active metal to enhance the competence of more-active noble metal. Herein, a one-pot hydrothermal approach is demonstrated for the controllable synthesis of Ag-rich Ag_9Pd_1 alloy nanoactiniae with obviously enhanced electro-catalytic activity(2.23 mA cm~(-2) at 0.85 V) and stability for oxygen reduction reaction. In alkaline solution, the ORR onset potential and half-wave potential of the Ag_9Pd_1 alloy nanoactiniae can reach a value of 1.02 V and 0.89 V, respectively, which origin from strong ligand and ensemble effects between Pd element and Ag element. The nanocrystals are uniformly alloyed, displaying a Ag_9Pd_1 combination, as displayed by an assembly of X-ray diffraction(XRD) spectrum,energy dispersive X-ray(EDX) analysis, and cyclic voltammetry(CV). This concept of tuning bimetallic alloy nanocrystals with low concentrations of more precious metal may be a promising approach to be applicable to a wide range of alloy nanocrystals.
        The electro-catalytic properties can be effectively optimized by designing bimetallic alloy nanoparticles with high-content less-active metal to enhance the competence of more-active noble metal. Herein, a one-pot hydrothermal approach is demonstrated for the controllable synthesis of Ag-rich Ag_9Pd_1 alloy nanoactiniae with obviously enhanced electro-catalytic activity(2.23 mA cm~(-2) at 0.85 V) and stability for oxygen reduction reaction. In alkaline solution, the ORR onset potential and half-wave potential of the Ag_9Pd_1 alloy nanoactiniae can reach a value of 1.02 V and 0.89 V, respectively, which origin from strong ligand and ensemble effects between Pd element and Ag element. The nanocrystals are uniformly alloyed, displaying a Ag_9Pd_1 combination, as displayed by an assembly of X-ray diffraction(XRD) spectrum,energy dispersive X-ray(EDX) analysis, and cyclic voltammetry(CV). This concept of tuning bimetallic alloy nanocrystals with low concentrations of more precious metal may be a promising approach to be applicable to a wide range of alloy nanocrystals.

引文

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