Chun’an Ma
Zhejiang University of Technology
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Featured researches published by Chun’an Ma.
Ionics | 2014
Chun’an Ma; Yanxian Jin; Meiqin Shi; Youqun Chu; Yinghua Xu; Wenping Jia; Qiaohua Yuan; Jiabin Chen; Huiling Pan; Qiuwei Dai
AbstractThe new Pd/WO3-CNTs catalysts are prepared for formic acid electrooxidation in direct formic acid fuel cells (DFAFCs). According to XRD, TEM, and HRTEM results, WO3 particles are covered or overlapped with Pd particles, which have a uniform and narrow size distribution due to the highly dispersion of WO3-CNTs. The electrochemical results show significantly enhanced electrocatalytic performances for formic acid oxidation on Pd/WO3-CNTs catalysts, especially its dramatically improved stability and excellent tolerance to CO poisoning, which is mainly ascribed to the interaction between Pd and WO3. Therefore, Pd/WO3-CNTs catalysts show the great potential as less expensive and more efficient electrocatalyst for DFAFCs. Additionally, the kinetic parameters such as the charge transfer parameter and the diffusion coefficient of formic acid electrooxidation on 20 %Pd/20 %WO3-CNTs were obtained. The new Pd/WO3-CNTs catalysts are prepared and studied in the oxidation of formic acid, and the significantly enhanced electrocatalytic performances, especially its dramatically improved stability and excellent tolerance to CO poisoning show great potential as less expensive and more efficient electrocatalyst for the direct formic acid fuel cells.
Ionics | 2014
Yin Xu Zhang; Xin Biao Mao; Song Chen; Jin Han Yao; Chun’an Ma
The binary composite ionic liquid mixtures composed of 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) and 1-butyl-3-methylimidazolium acetate ([bmim][Ac]) were studied and used in electroreduction of nitrobenzene for the first time. 1H NMR and Fourier transform infrared (FTIR) spectroscopy were carried out to acquire a deep understanding of the interaction of binary ionic liquids, and UV/Vis spectroscopy was used to study the interaction between the mixture of ionic liquids and nitrobenzene. It was found that chemical shifts of all protons were changed and significant changes in the anion IR bands were induced, and the UV maximum absorption wavelength and absorbance of nitrobenzene in binary ionic liquids were different from those in the neat ionic liquid. The electrochemical reduction behavior of nitrobenzene in binary composite ionic liquids on platinum electrode was studied by cyclic voltammetry, in situ Fourier transform infrared spectroscopy, and constant potential electrolysis. Results indicated that the reduction of nitrobenzene in binary composite ionic liquids demonstrated higher current densities with a more positive potential, and the product (azobenzene) showed higher yield and selectivity in the composite ionic liquids than in the neat ionic liquids; the concentrations of water in the binary mixtures of ionic liquids had great effect on the electrochemical behavior of nitrobenzene. In the end, the mechanism of reduction of nitrobenzene in binary mixtures of ionic liquids was discussed.
Electrochimica Acta | 2007
Guohua Li; Chun’an Ma; Junyan Tang; Jiangfeng Sheng
Electrochimica Acta | 2013
Yinghua Xu; Qian Qian Cai; Hong Xing Ma; Yan He; Hong Zhang; Chun’an Ma
Electrochimica Acta | 2013
Huajun Zheng; Zuo Chen; Yang Li; Chun’an Ma
Electrochimica Acta | 2010
Chun’an Ma; Mei Chao Li; Yan Na Liu; Yinghua Xu
Journal of Solid State Electrochemistry | 2014
Meiqin Shi; Weiming Liu; Di Zhao; Youqun Chu; Chun’an Ma
Journal of The Electrochemical Society | 2014
Chun’an Ma; Yanxian Jin; Meiqin Shi; Youqun Chu; Yinghua Xu; Wenping Jia; Qiaohua Yuan; Jiabin Chen; Dongkai Chen; Shuomiao Chen
Electrochimica Acta | 2014
Meiqin Shi; W.K. Zhang; Di Zhao; Youqun Chu; Chun’an Ma
Electrochimica Acta | 2011
Mei Chao Li; Dan Dan Bao; Chun’an Ma