(PtAuPt)HN/GC的制备及对甲酸氧化的电催化性能

doi:10.7503/cjcu20140188

高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (12): 2688.doi: 10.7503/cjcu20140188

(PtAuPt)_HN/GC的制备及对甲酸氧化的电催化性能

商中瑾¹, 颜亮亮¹, 饶贵仕¹, 熊婷¹, 田伟¹, 林旋¹, 钟起玲¹(), 任斌²

1. 江西师范大学化学化工学院, 南昌 330022
2. 厦门大学化学化工学院化学系, 固体表面物理化学国家重点实验室, 厦门 361005

收稿日期:2014-03-07 出版日期:2014-12-10 发布日期:2014-11-29
作者简介:联系人简介: 钟起玲, 男, 教授, 主要从事表/界面电化学、光谱电化学和纳米电化学研究. E-mail:zhqiling@163.com
基金资助:
国家自然科学基金(批准号: 20663002)和厦门大学固体表面物理化学国家重点实验室基金(批准号: 200511)资助

Preparation of (PtAuPt)_HN/GC and Its Electrocatalytic Performance for Formic Acid Oxidation^†

SHANG Zhongjin¹, YAN Liangliang¹, RAO Guishi¹, XIONG Ting¹, TIAN Wei¹, LIN Xuan¹, ZHONG Qiling^1,^*(), REN Bin²

1. College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, China
2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China

Received:2014-03-07 Online:2014-12-10 Published:2014-11-29
Contact: ZHONG Qiling E-mail:zhqiling@163.com
Supported by:
† Supported by the National Natural Science Foundation of China(No.20663002) and the Foundation of State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, China(No.200511)

摘要/Abstract

摘要：

以Se溶胶为模板, 合成了多层核壳结构的Se@Pt@Au@Pt实心纳米粒子; 采用化学与电化学相结合的除硒方法制得了(PtAuPt)_HN/GC, 并表征了(PtAuPt-Se)_HN的表面形貌、结构与组成; 以甲酸为探针分子, 比较了(PtAuPt)_HN/GC和Pt/C/GC对甲酸氧化的电催化行为, 发现(PtAuPt)_HN/GC催化甲酸氧化只有1个氧化峰, 峰电位和峰电流分别约为0.35 V和1.22 mA/cm², 而Pt/C/GC则有2个氧化峰, 在 0.35 V时所对应的电流密度仅约为0.30 mA/cm², 前者在该电位时的电流密度是后者的4倍; 在0.30 mA/cm²的电流密度下, (PtAuPt)_HN /GC对应的电极电位为0.01 V, 比Pt/C/GC负移了340 mV; 在600 s时的计时电流分别为0.06和0.02 mA/cm². (PtAuPt)_HN对甲酸氧化的电催化活性不但比Pt/C高, 而且具有一定的抗CO中毒性能.

关键词: 铂-金-铂纳米空球, 电极, 电催化, 甲酸氧化

Abstract:

Se@Pt@Au@Pt multilayer core-shell nanoparticles were synthesized in bulk using selenium colloids as template. After removing the selenium template by chemical method, Pt-Au-Pt hollow nanospheres[(PtAuPt-Se)_HN], which containing a small amount of residual selenium, were synthesized and used to modify GC electrode. After the residual selenium were removed from (PtAuPt-Se)_HN/GC by electrochemical method, (PtAuPt)_HN/GC was obtained. Scanning electron microscopy(SEM), transmission electron microscopy(TEM), energy dispersive X-ray spectrocopy(EDS) and X-ray diffraction(XRD) were used to characterize their surface morphologies, structures and compositions. The electrocatalytic oxidation activity of (PtAuPt)_HN/GC and Pt/C/GC were measured by using formic acid as a probe molecule. Cyclic voltammogram(CV) reveals that the current density of the formic acid oxidation on (PtAuPt)_HN/GC was four times as large as that of the latter when the potential was 0.35 V. The potential of (PtAuPt)_HN/GC was shifted negatively about 340 mV compared to the Pt/C/GC when the current density was 0.30 mA/cm². The chronoamperometry of (PtAuPt)_HN/GC and Pt/C/GC was 0.06 and 0.02 mA/cm² respectively after 600 s. The results show that the electrocatalytic activity of (PtAuPt)_HN for formic acid oxidation was significantly higher than that of Pt/C.

Key words: Pt-Au-Pt hollow nanospheres, Electrode, Electrocatalysis, Oxidation of formic acid

中图分类号:

O646

TrendMD:

商中瑾, 颜亮亮, 饶贵仕, 熊婷, 田伟, 林旋, 钟起玲, 任斌. (PtAuPt)_HN/GC的制备及对甲酸氧化的电催化性能. 高等学校化学学报, 2014, 35(12): 2688.

SHANG Zhongjin, YAN Liangliang, RAO Guishi, XIONG Ting, TIAN Wei, LIN Xuan, ZHONG Qiling, REN Bin. Preparation of (PtAuPt)_HN/GC and Its Electrocatalytic Performance for Formic Acid Oxidation^†. Chem. J. Chinese Universities, 2014, 35(12): 2688.

图/表 7

Fig.1 SEM(A) and TEM(B) images of(PtAuPt-Se)HN

Fig.2 EDS(A) and XRD pattern(B) of(PtAuPt-Se)HN

Fig.3 XPS of (PtAuPt-Se)HN

Fig.4 Peak fitting curves of Pt4f XPS in (PtAuPt-Se)HN

Fig.5 Cyclic voltammograms of (PtAuPt-Se)HN/GC in 0.5 mol/L H2SO4 with different cyclic times

Fig.6 Cyclic voltammograms of formic acid eletroca-talytic oxidation on(PtAuPt-Se)HN/GC(a), (PtAuPt-1/4Se)HN/GC(b), (PtAuPt)HN/GC(c) and Pt/C/GC(d) in 0.2 mol/L HCOOH+0.5 mol/L H2SO4

Fig.7 Chronoamperometry curve of formic acid eletrocatalytic oxidation on(PtAuPt-1/4Se) HN/GC(a), (PtAuPt)HN/GC(b) and Pt/C/GC(c) in 0.2 mol/L HCOOH+0.5 mol/L H2SO4 Step potential: 100 mV.

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(PtAuPt)_HN/GC的制备及对甲酸氧化的电催化性能

Preparation of (PtAuPt)_HN/GC and Its Electrocatalytic Performance for Formic Acid Oxidation^†

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(PtAuPt)HN/GC的制备及对甲酸氧化的电催化性能

Preparation of (PtAuPt)HN/GC and Its Electrocatalytic Performance for Formic Acid Oxidation†

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(PtAuPt)_HN/GC的制备及对甲酸氧化的电催化性能

Preparation of (PtAuPt)_HN/GC and Its Electrocatalytic Performance for Formic Acid Oxidation^†