Green dual-template synthesis of AgPd core–shell nanoparticles with enhanced electrocatalytic activity. (21st October 2019)

• Record Type: Journal Article
• Authors: Liu, Huan; Li, Lei; Luo, Liyao; He, Yuchu; Cong, Cong; He, Yaqian; Hao, Zining; Gao, Dawei
• Is Part Of: Nanotechnology. Volume 31:Number 3(2020)
• Publication Date: 2019-10-21
• Subjects: Vapreotide acetate -- dual-template cascade synthesis -- electrocatalytic activity -- ethanol oxidation -- AgPd core–shell nanoparticles; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab4836
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: A key challenge in developing an ethanol oxidation reaction is nontoxic fabrication of highly active stable and low-cost catalysts. Here we design a green synthetic strategy of AgPd bimetallic nanosphere by a dual-template cascade method. The Pd nanoshell is firstly prepared using Vapreotide acetate as a primary template, and then the Ag nanoshell acts as a secondary template for the distribution of AgPd alloy nanoparticles. The AgPd nanoparticles have core–shell structures and various sizes, and their shell thicknesses are tuned by controlling the amount of PdCl2 . The six different samples are prepared, named AgPd-1, AgPd-2, AgPd-3, AgPd-4, AgPd-5, and AgPd-6, respectively. The mass current density of AgPd-5, is higher 3.87 times that of commercial Pd/C, and exhibits the best ethanol oxidation reaction activity and long-term stability. The main reasons are that the AgPd-5 possessed excellent specific surface area due to their rough structure, and Ag can remove more CO-like species. This is the first time a Vapreotide acetate/Ag-template method has been used to synthesize a AgPd core–shell structure, which would have broad application prospects for direct ethanol fuel cells.