催化作用
计时安培法
循环伏安法
甲酸
X射线光电子能谱
甲醇
电化学
无机化学
纳米颗粒
化学
材料科学
核化学
化学工程
纳米技术
有机化学
物理化学
电极
工程类
作者
Mei Wang,Yongwei He,Ruixue Li,Zhanhong Ma,Zhonghua Zhang,Xiaoguang Wang
标识
DOI:10.1016/j.electacta.2015.07.157
摘要
Through synthesizing a series of carbon supported ternary PtAuCu nanoparticle catalysts with the varied Cu content followed by subsequently electro-chemical activation treatment, highly active Pt-Au-rich nanoparticle catalysts have successfully been acquired in the present paper. The as-synthesized and activated catalysts were characterized using X-ray diffraction (XRD), transmission electron spectroscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV) and chronoamperometry (CA). The results show that the electrochemical activation process has a strongly interrelationship with the compositional ratio between Pt/Au and Cu. The higher the Cu content is in the precursor, the lower the residual buried-underneath Cu atoms retain after the activation. Among the catalysts, the activated Pt10Au10Cu80/C exhibits the best catalytic performance for the electro-oxidation of commonly-targeted small organic molecule fuels including formic acid, methanol and ethanol in acid circumstance. The catalytic activity enhancement mechanism based upon the electrochemical activation process as well as induced possible synergistic effect from elemental interactions was also discussed.
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