Keggin型钴取代杂多阴离子PW11O39Co(II)(H2O)5-的电催化性能

CORC > 厦门大学 > 2013年第19卷

	Keggin型钴取代杂多阴离子PW11O39Co(II)(H2O)5-的电催化性能; Electrocatalytic Properties of the Keggin-Type Co(II)-Substituted Heteropolyanion PW11O39Co(II)(H2O)5-
	王彬 ; 王崇太 ; 华英杰 ; 刘津媛 ; 郑良飞 ; WANG Bin ; WANG Chong-tai ; HUA Ying-jie ; LIU Jin-yuan ; ZHENG Liang-fei
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract10008.shtml
	2013-10-28
关键词	Keggin型钴取代杂多阴离子过氧化氢甲醇电催化氧化 Keggin-type Co-substituted heteropolyanion hydrogen peroxide methanol electrocatalytic oxidation
英文摘要	本文用循环伏安、交流阻抗等电化学方法研究了Keggin型钴取代杂多阴离子PW11O39Co(II)(H2O)5-(PW11Co)的电化学性质及其对H2O2和甲醇阳极氧化的电催化作用，提出了PW11Co作为阳极媒质可能的电催化机理. 结果表明，PW11Co除了2对可逆的W—O骨架峰之外，在1.367 V/1.266 V处还有1对准可逆的Co峰，对应于Co(II)/Co(III)电对的氧化还原响应. 该电极过程有质子参与，其交换电流密度i0为5.7×10-6 A·cm-2. 在酸性条件下(pH 2.5)，PW11Co对H2O2的阳极氧化具有明显的电催化活性，耦合甲醇的氧化可使甲醇的氧化速率显著提高.; The electrochemical properties of the Keggin-type Co(II)-substituted heteropolyanion PW11O39Co(II)(H2O)5- (PW11Co), as well as the electrocatalytic properties of PW11Co towards the anodic oxidations of H2O2 and CH3OH were studied using the electrochemical methods such as cyclic voltammetry and AC impedance spectroscopy in this paper. An electrocatalytic mechanism of PW11Co as an anodic medium was also proposed. It was found that PW11Co showed a pair of pseudo-reversible redox peaks at the potentials of 1.367 V/1.266 V, corresponding to the redox responses of the Co(II)/Co(III) couple, apart from two pairs of reversible W—O skeleton redox peaks. A proton was involved in the electrode process of the Co(II)/Co(III) couple with an exchange current density (i0) of 5.7×10-6 A·cm-2. In particular, the couple exhibited a high electrocatalytic activity towards the anodic oxidation of H2O2 in an acidic solution of pH 2.5, which can be coupled to catalyze the methanol oxidation.; 国家自然科学基金项目(No. 20963003；No. 21161007)、海南省国际科技合作重点项目(No. 2012-GH004)及海南省高等学校重点科研项目（No. Hjkj2012-15）; 作者联系地址：海南师范大学化学与化工学院，海南海口 571158; Author's Address: School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China; 通讯作者E-mail：wct581@sina.com
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/58546]
专题	2013年第19卷
推荐引用方式 GB/T 7714	王彬,王崇太,华英杰,等. Keggin型钴取代杂多阴离子PW11O39Co(II)(H2O)5-的电催化性能, Electrocatalytic Properties of the Keggin-Type Co(II)-Substituted Heteropolyanion PW11O39Co(II)(H2O)5-[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract10008.shtml,2013.
APA	王彬.,王崇太.,华英杰.,刘津媛.,郑良飞.,...&ZHENG Liang-fei.(2013).Keggin型钴取代杂多阴离子PW11O39Co(II)(H2O)5-的电催化性能.http://electrochem.xmu.edu.cn/CN/abstract/abstract10008.shtml.
MLA	王彬,et al."Keggin型钴取代杂多阴离子PW11O39Co(II)(H2O)5-的电催化性能".http://electrochem.xmu.edu.cn/CN/abstract/abstract10008.shtml (2013).