碳载钴镍合金纳米电极的制备表征与电催化性能

doi:10.3969/j.issn.0438-1157.2013.05.031

化工学报 ›› 2013, Vol. 64 ›› Issue (5): 1730-1735.DOI: 10.3969/j.issn.0438-1157.2013.05.031

碳载钴镍合金纳米电极的制备表征与电催化性能

欧洁连, 陈燕鑫, 李明轩, 许斌斌, 王鹏, 陈声培, 孙世刚

厦门大学固体表面物理化学国家重点实验室, 化学化工学院化学系, 福建厦门 361005

收稿日期:2012-08-02 修回日期:2012-09-20 出版日期:2013-05-05 发布日期:2013-05-05
通讯作者: 陈声培
作者简介:欧洁连(1987-),女,硕士研究生。
基金资助:
国家自然科学基金项目(21222310,21021002,21073152);浙江省重中之重学科开放基金项目(20090503)。

Preparation and characterization of carbon supported CoNi alloy nanoparticles electrode and their electrocatalytic properties

OU Jielian, CHEN Yanxin, LI Mingxuan, XU Binbin, WANG Peng, CHEN Shengpei, SUN Shigang

State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, School of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China

Received:2012-08-02 Revised:2012-09-20 Online:2013-05-05 Published:2013-05-05
Supported by:
supported by the National Natural Science Foundation of China(21222310,21021002,21073152).

摘要/Abstract

摘要： 采用电化学方法在玻碳(GC)表面电沉积CoNi合金纳米粒子,成功制得碳载CoNi合金纳米电极(CoNi/GC)。SEM结果显示,CoNi粒子呈十八面体结构,粒径约100 nm,分布较均匀。选区电子衍射(SAED)结果显示,CoNi合金纳米粒子为单晶结构。XPS结果显示,金属态的Co(0)和Ni(0)占主导地位。性能测试结果表明:CoNi/GC不但对亚硝酸钠具有较好的催化性能,相对于本体Co和本体Ni,CoNi/GC的起始还原电位(E_i)正移约90 mV,还原峰电流(j_p)增大6~14倍。而且对氧还原亦有较好的电催化活性,CoNi/GC的峰电流密度(j_p)和动力电流密度(j_k)分别是GC电极的1.7和 5.2倍。

关键词: CoNi/GC电极, 十八面体, 电沉积, 亚硝酸盐还原, 氧还原

Abstract: CoNi alloy nanoparticles were synthesized on glassy carbon(GC)electrode(CoNi/GC)by electrochemical deposition.SEM images showed that the prepared CoNi alloy nanoparticles were 18-facet polyhedra with an average particles size of 100 nm, dispersed on the GC electrode surfaces uniformly.The selected area electron diffraction(SAED)pattern showed that CoNi alloy nanoparticles were single crystals.X-ray photoelectron spectroscopy(XPS)showed that the Co(0)and Ni(0)were dominant.The electrocatalytical activities for nitrite reduction of bulk Co, bulk Ni and CoNi/GC electrodes were investigated by cyclic voltammetry(CV).Onset potential(E_i)of nitrite reduction on CoNi/GC electrode was positively shifted 90 mV, and peak current density(j_p)was 6-14 times higher than those of bulk Co and bulk Ni electrode.CoNi/GC electrode also showed an enhancement of electrocatalytical activity towards oxygen reduction reaction, of which peak current density(j_p)was 1.7 times and dynamic current density(j_k)was 5.2 times higher than those of GC electrode.

Key words: CoNi/GC electrode, 18-facet polyhedra, electrodeposition, nitrite reduction, ORR

中图分类号:

O646

欧洁连, 陈燕鑫, 李明轩, 许斌斌, 王鹏, 陈声培, 孙世刚. 碳载钴镍合金纳米电极的制备表征与电催化性能[J]. 化工学报, 2013, 64(5): 1730-1735.

OU Jielian, CHEN Yanxin, LI Mingxuan, XU Binbin, WANG Peng, CHEN Shengpei, SUN Shigang. Preparation and characterization of carbon supported CoNi alloy nanoparticles electrode and their electrocatalytic properties[J]. CIESC Journal, 2013, 64(5): 1730-1735.

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碳载钴镍合金纳米电极的制备表征与电催化性能

Preparation and characterization of carbon supported CoNi alloy nanoparticles electrode and their electrocatalytic properties

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