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Preparation of Surfactant-Free Pt and PtRu Nanoparticles with High Activity for Methanol Oxidation
Yao Yao,Jun Cai,Yong-li Zheng,Yan-xia Chen*
Author NameAffiliationE-mail
Yao Yao Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Jun Cai Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Yong-li Zheng Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Yan-xia Chen* Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China yachen@ustc.edu.cn 
Abstract:
A simple and green approach to synthesize highly active electro-catalysts for methanol oxidation reaction (MOR) without using any organic agents is described. Pt nanoparticles are directly deposited on the pre-cleaned and pre-oxidized multiwall carbon nanotubes (MWCNTs) from Pt salt by using CO as the reductant. MOR activity has been characterized by both cyclic voltammetry and chronoamperometry, the current density and mass specific current at the peak potential (ca. 0.9 V vs. RHE) reaches 11.6 mA/cm2 and 860 mA/mgPt, respectively. After electro-deposition of Ru onto the Pt/MWCNTs surface, the catalysts show steady state mass specific current of 20 and 80 mA/mgPt at 0.5 and 0.6 V, respectively.
Key words:  Pt nano-electrocatalyst, PtRu nano-electrocatalyst, Green synthesis, Methanol oxidation reaction, Carbon monoxide
FundProject:
无表面活性剂Pt和PtRu纳米粒子制备及其甲醇氧化活性
姚瑶,蔡俊,郑勇力,陈艳霞*
摘要:
利用一种简单的方法制备不含任何表面活性剂并具有高甲醇氧化活性的Pt和PtRu纳米电催化剂. 以CO为还原剂, CO和多壁碳纳米管(MWCNTs)为保护剂和载体,通过一步反应得到沉积在多壁碳纳米管上Pt纳米粒子,在制备过程中无需使用任何有机溶剂或表面活性剂. 利用循环伏安法和计时电流法表征了所合成催化剂的甲醇氧化活性,甲醇氧化的峰电位(ca. 0.9 V vs. RHE)处的电流密度和比质量电流高达11.6 mA/cm2 和860 mA/mgPt. 在Pt/MWCNTs表面电沉积Ru后,催化剂在低电位处的甲醇氧化活性得到提高,其在0.5和0.6 V的稳态比质量电流分别达到了20和80 mA/mg.
关键词:  Pt纳米催化剂,PtRu纳米催化剂,制备方法,甲醇氧化,一氧化碳
DOI:10.1063/1674-0068/27/03/332-336
分类号: