Pt-Mo2C/GC催化甲醇氧化的现场电化学-红外光谱研究

doi:10.61558/2993-074X.2939

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (1): 83-88. doi: 10.61558/2993-074X.2939

Pt-Mo2C/GC催化甲醇氧化的现场电化学-红外光谱研究

黄海萍, 姚希宇, 沈培康*

中山大学光电材料与技术国家重点实验室，广东省低碳化学与过程节能重点实验室，物理科学与工程技术学院，广东广州 510275

收稿日期:2011-12-15 修回日期:2012-01-05 出版日期:2013-02-28 发布日期:2012-01-25
通讯作者: 沈培康 E-mail:stsspk@mail.sysu.edu.cn
基金资助:
国家自然科学基金(No. 21073241, No. U1034003)资助

An In situ FTIR spectroelectrochemical study on methanol oxidation at Pt-Mo2C/GC catalyst

HUANG Hai-Ping, YAO Xi-Yu, SHEN Pei-Kang*

The State Key Laboratory of Optoelectronic Materials and Technologies, and Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Physics and Engineering, Sun Yat-sen University, 135 Xingang Road, Guangzhou, 510275, PR China

Received:2011-12-15 Revised:2012-01-05 Published:2013-02-28 Online:2012-01-25
Contact: SHEN Pei-Kang E-mail:stsspk@mail.sysu.edu.cn

摘要/Abstract

摘要： 应用离子交换法制备了40% Pt在-Mo2C/GC上的电催化剂. X射线衍射(XRD)显示，Pt在Mo2C载体上有较好的分散度，平均粒径为3 nm.循环伏安、计时电位测试表明，酸性溶液中,Pt-Mo2C/GC具有良好的甲醇氧化性能. 其催化甲醇氧化的起始电位比Pt/C的负移了90 mV. 这一优异性能与Pt和载体Mo2C之间的协同作用有关. 现场红外光谱电化学测量显示，甲醇在Pt/C电极氧化的中间产物是桥式吸附COB和线性吸附COL，而在Pt-Mo2C/GC电极则未检测到有害中间产物CO，其氧化终产物均为CO2.

关键词: 电催化, Pt-Mo2C/GC, Pt/C, 甲醇, 现场电化学红外光谱

Abstract: A 40% Pt on Mo2C/GC catalyst has been prepared by ion exchange method. The mechanism of methanol electrooxidation on Pt-Mo2C/GC and commercial Pt/C catalysts in acidic media was studied by cyclic voltammetry, XRD measurements and in-situ Fourier transform infrared spectroelectrochemistry. The results revealed that the Pt nanoparticles were uniformly dispersed on Mo2C/GC with an average particle size of 3 nm. The cyclic voltammetric and chronopotentiometric experiments indicated that Pt-Mo2C/GC catalyst exhibited a better performance for methanol oxidation than that of Pt/C in acid solution. A negative shift over 90 mV of the onset potential for methanol oxidation was found on Pt-Mo2C/GC compared with that on Pt/C. The in situ FTIR spectroelectrochemical measurements indicated that the intermediate products of methanol oxidation on Pt/C catalyst were bridge COB and linear COL. No CO was detected on Pt-Mo2C/GC catalyst during the oxidation of methanol by FTIR spectroscopy, indicating the electrooxidation was a non-poisoning process.

Key words: electrocatalysis, Pt-Mo2C/GC, Pt/C, methanol oxidation, In situ Fourier transform infrared spectroelectrochemistry

中图分类号:

O646

黄海萍, 姚希宇, 沈培康. Pt-Mo2C/GC催化甲醇氧化的现场电化学-红外光谱研究[J]. 电化学（中英文）, 2013, 19(1): 83-88.

HUANG Hai-Ping, YAO Xi-Yu, SHEN Pei-Kang. An In situ FTIR spectroelectrochemical study on methanol oxidation at Pt-Mo2C/GC catalyst[J]. Journal of Electrochemistry, 2013, 19(1): 83-88.

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https://electrochem.xmu.edu.cn/CN/Y2013/V19/I1/83

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Pt-Mo2C/GC催化甲醇氧化的现场电化学-红外光谱研究

An In situ FTIR spectroelectrochemical study on methanol oxidation at Pt-Mo2C/GC catalyst

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