Ni-B非晶态合金纳米粉末微电极上甲醇的电催化氧化

电化学（中英文） ›› 2007, Vol. 13 ›› Issue (3): 307-311.

Ni-B非晶态合金纳米粉末微电极上甲醇的电催化氧化

郑一雄;姚士冰;周绍民;

厦门大学化学化工学院,厦门大学化学化工学院,厦门大学化学化工学院福建厦门361005,华侨大学材料科学与工程学院,福建泉州362021,福建厦门361005,福建厦门361005

收稿日期:2007-08-28 修回日期:2007-08-28 出版日期:2007-08-28 发布日期:2007-08-28

Electrocatalytic Oxidation of Methanol at the Nano Ni-B Amorphous Alloy Powdermicroelectrode

ZHENG Yi-xiong1,2*,YAO Shi-bing1,ZHOU Shao-min1

(1.College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China,2.College of Material Science and Engineering,Huaqiao University,Quanzhou 362021,Fujian,China

Received:2007-08-28 Revised:2007-08-28 Published:2007-08-28 Online:2007-08-28

摘要/Abstract

摘要： 应用循环伏安法研究了碱性介质中Ni-B非晶态合金纳米粉末微电极上甲醇的电催化氧化.结果表明,Ni-B非晶态合金纳米粉末微电极表现出很高的甲醇氧化电催化活性,较之高择优取向(220)的镍电极,其氧化起始电位负移了0.04V;氧化电流密度约大2个数量级,根据稳态极化曲线测定,与高择优取向(220)镍电极相比较,在Ni-B非晶态合金纳米粉末微电极上,Ni(Ⅲ)与甲醇反应和Ni(Ⅱ)氧化为Ni(Ⅲ)及其逆反应的速率常数依次约大2个、3个和3个数量级.

关键词: Ni-B非晶态合金, 纳米颗粒, 粉末微电极, 甲醇, 电催化氧化

Abstract: Electrocatalytic oxidation of methanol at the nano Ni-B amorphous alloy powder-microelectrode in alkaline media was studied by using cyclic voltammetry.Compared to the highly preferred orientation(220) nickel electrode,The onset potential of methanol electrooxidation at the nano Ni-B microelectrode is negatively shifted about 0.04V,and the current density is increased approximately by 2 orders of magnitude.Thus,the nano Ni-B microelectrode has very strong electrocatalytic activity for the oxidation of methanol.The kinetic parameters were determined with the steady polarization curves.The results show that the rate constants for both the oxidation of Ni(Ⅱ) to Ni(Ⅲ) and the reduction of Ni(Ⅲ) to Ni(Ⅱ) at the nano Ni-B microelectrode are elevated by about the 3 orders of magnitude,while the rate constant for the oxidation of methanol by Ni(Ⅲ) is increased by around the 2 orders of magnitude,in comparison with the highly preferred orientation(220) nickel electrode.

Key words: Ni-B amorphous alloy, nanoparticle, powdermicroelectrode, methanol, electrocatalytic oxidation

中图分类号:

O646.54

郑一雄;姚士冰;周绍民;. Ni-B非晶态合金纳米粉末微电极上甲醇的电催化氧化[J]. 电化学（中英文）, 2007, 13(3): 307-311.

ZHENG Yi-xiong1,2*,YAO Shi-bing1,ZHOU Shao-min1. Electrocatalytic Oxidation of Methanol at the Nano Ni-B Amorphous Alloy Powdermicroelectrode[J]. Journal of Electrochemistry, 2007, 13(3): 307-311.

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链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2007/V13/I3/307

参考文献

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