电化学制备二维&ldquo;花状&rdquo;Pt纳米结构及其对甲醇的电催化氧化

CORC > 厦门大学 > 2014年第20卷

	电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化; Electrochemical Fabrication of Two-Dimensional Flower-like Pt Nanostructures for Methanol Electrocatalytic Oxidation
	王霞 ; 胡俊 ; 李永军 ; WANG Xia ; HU Jun ; LI Yong-Jun
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract10090.shtml
	2014-08-28
关键词	铂甲醇纳米结构电沉积电催化氧化 platinum methanol nanostructure electrodeposition electrocatalytic oxidation
英文摘要	采用恒电流电化学技术在玻碳基底上制得二维“花状”Pt纳米结构（2D FPNs）样品，所用的电解液为HAuCl4 + HClO4溶液，无需添加任何表面结构诱导的有机试剂，Pt纳米结构表面更“洁净”，有较高的反应活性. 扫描电子显微镜测试显示，2D FPNs样品是由球状纳米花构成，纳米叶子是构筑纳米花的最小单元. 通过控制电沉积时间可调控球状Pt纳米花数的密度. 高倍透射电子显微镜测试表明每个叶状纳米片沿着Pt(111)晶面定向生长. 甲醇电催化氧化活性与电沉积时间有关. 2D FPNs电极的甲醇的电催化活性稍高于商业Pt/C电极，却有更好的抗毒化能力，这可能归因于其特定的暴露晶面及表面的“洁净性”.; Two-dimensional flower-like Pt nanostructures (2D FPNs) were fabricated on glassy carbon substrates by galvanostatical electrochemical technique. The electrolyte was the HAuCl4 + HClO4 aqueous solution without addition of any structure-directing organic reagent, which made as-prepared Pt nanostructures cleaner, exhibiting much higher reactivity. Scanning electron microscopic images revealed that 2D FPNs were spherical Pt nano-flowers constructed by the smallest building blocks, nano-leaves. The number density of spherical Pt nano-flowers can be tuned by controlling the electrodeposition time. High resolution transmission electron microscopic images indicated that each nano-leaf was formed by growing along Pt(111) direction. Electrocatalytic activities of as-prepared 2D FPNs were closely linked with the electrodeposition time. The electrocatalytic activity of 2D FPNs under the optimized electrodeposition time was slightly higher than that of the commercial Pt/C catalyst with much better tolerance to CO-like poisoning molecules. It may be attributed to the exposure of specified facets and the cleanness of surface.; 国家自然科学基金项目(No. 21170606)及湖南大学化学科学基地研究项目(No. J1210040，No. J1103312)资助; 作者联系地址：platinum; methanol; nanostructure; electrodeposition; electrocatalytic; oxidation; Author's Address: College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China; 通讯作者E-mail：liyongjunef@gmail.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://dx.doi.org/10.13208/j.electrochem.131166]
专题	2014年第20卷
推荐引用方式 GB/T 7714	王霞,胡俊,李永军,等. 电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化, Electrochemical Fabrication of Two-Dimensional Flower-like Pt Nanostructures for Methanol Electrocatalytic Oxidation[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract10090.shtml,2014.
APA	王霞,胡俊,李永军,WANG Xia,HU Jun,&LI Yong-Jun.(2014).电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化.http://electrochem.xmu.edu.cn/CN/abstract/abstract10090.shtml.
MLA	王霞,et al."电化学制备二维“花状”Pt纳米结构及其对甲醇的电催化氧化".http://electrochem.xmu.edu.cn/CN/abstract/abstract10090.shtml (2014).