LAUSR

A key challenge in developing 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 dual-template cascade method. The Pd nanoshell are firstly prepared by using Vapreotide acetate as primary template, and then the Ag nanoshell act as 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 than that of commercial Pd/C, 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. Based on Vapreotide acetate/Ag-template method to synthesize AgPd core-shell structure is the first time, which would have broad application prospects for the direct ethanol fuel cells.