Rational construction of Au–Ag bimetallic island-shaped nanoplates for electrocatalysis

doi:10.1088/2053-1591/ab726e

	Rational construction of Au–Ag bimetallic island-shaped nanoplates for electrocatalysis
	Zhao,Hong 2; Liu,Diandian 2; Xu,Shujuan 3; Chen,Yao 2; Yin,Fujun 2; Yang,Tao 2; Wang,Mingyan 2; Deng,Hua 4; Zhang,Wei 1; Liu,Weiwei 2
刊名	Materials Research Express
	2020-02-01
卷号	7 期号:2
关键词	bimetallic nanoplates Au–Ag alloy chemistry modification electrocatalysts hydrogen evolution electrocatalysis
DOI	10.1088/2053-1591/ab726e
英文摘要	Abstract Active electrocatalysts are the key to water splitting for hydrogen production through the electrolysis. In this paper, 50 nm silver nanoplates were used as templates for synthesis of Au–Ag island-shaped nanoplates by controlling the surface chemistry. The guiding mechanism of polyvinylpyrrolidone (PVP, Mw?=?40 000) to Au–Ag island-shaped nanoplates crystal was also further investigated. It is found that the surface energy of Ag nanoplates between (100) and (111) crystal planes can be regulated by varying the amount of PVP in the system. Then a uniform Au-Ag triangular island nanostructure was obtained. Compared with the Ag nanoplates catalysts, the Au–Ag island nanoplates catalysts show the superior catalytic performances in hydrogen evolution electrocatalysis (HER). These results demonstrate a new surface chemistry modification by PVP and a galvanic displacement reaction for designing the active electrocatalysts. More importantly, the Au–Ag island-shaped nanoplates show an unconventional growth mode of preserving the original Ag nano-triangular crystal structure. The enhanced performance in electrocatalysis can be mainly attributed to Au–Ag alloy structure, which allows the appearance of synergistic effects. The present work demonstrates the crucial roles of surface chemistry in catalysts synthesis, which may guide the design of active bimetallic catalysts.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:2053-1591-7-2-AB726E
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10349]
专题	中国科学院重庆绿色智能技术研究院
作者单位	1.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, People’s Republic of China 2.Department of Chemical Engineering, College of Pharmaceutical sciences, Jiangsu Ocean University, Lianyungang 222000, People’s Republic of China 3.School of Structure Engineering, Lianyungang technical college, Lianyungang 222000, People’s Republic of China 4.Chongqing Youth Vocational & Technical College, Chongqing 400712, People’s Republic of China
推荐引用方式 GB/T 7714	Zhao,Hong,Liu,Diandian,Xu,Shujuan,et al. Rational construction of Au–Ag bimetallic island-shaped nanoplates for electrocatalysis[J]. Materials Research Express,2020,7(2).
APA	Zhao,Hong.,Liu,Diandian.,Xu,Shujuan.,Chen,Yao.,Yin,Fujun.,...&Liu,Xiaohong.(2020).Rational construction of Au–Ag bimetallic island-shaped nanoplates for electrocatalysis.Materials Research Express,7(2).
MLA	Zhao,Hong,et al."Rational construction of Au–Ag bimetallic island-shaped nanoplates for electrocatalysis".Materials Research Express 7.2(2020).