Nanoporous PtAg and PtCu alloys with hollow ligaments for enhanced electrocatalysis and glucose biosensing

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 生物传感技术团队

	Nanoporous PtAg and PtCu alloys with hollow ligaments for enhanced electrocatalysis and glucose biosensing
	Xu, Caixia 3; Liu, Yunqing 3; Su, Fa 3; Liu, Aihua 1,2; Qiu, Huajun 1,2
刊名	BIOSENSORS & BIOELECTRONICS
	2011-09-15
卷号	27 期号:1 页码:160-166
关键词	Dealloying Galvanic replacement Electrocatalyst Hollow nanostructure Glucose biosensor
中文摘要	Nanoporous silver (NPS) and copper (NPC) obtained by dealloying AgAl and CuAl alloys, respectively, were used as both three-dimensional templates and reducing agents for the fabrication of nanoporous PtAg (NPS-Pt) and PtCu (NPC-Pt) alloys with hollow ligaments by a simple galvanic replacement reaction with H₂PtCl₆. Electron microscopy and X-ray diffraction characterizations demonstrate that NPS and NPC with similar ligament sizes (30–50 nm) have different effects on the formed hollow nanostructures. For NPS-Pt, the shell of the hollow ligament is seamless. However, the shell of NPC-Pt is comprised of small pores and alloy nanoparticles with a size of ∼3 nm. The as-prepared NPS-Pt and NPC-Pt exhibit remarkably improved electrocatalytic activities towards the oxidation of ethanol and H₂O₂ compared with state-of-the-art Pt/C catalyst, and can be used for sensitive electrochemical sensing applications. The hierarchical nanoporous structure also provides a good microenvironment for enzymes. After immobilization of glucose oxidase (GOx), the enzyme modified nanoporous electrode can sensitively detect glucose in a wide linear range (0.6–20 mM).
英文摘要	Nanoporous silver (NPS) and copper (NPC) obtained by dealloying AgAl and CuAl alloys, respectively, were used as both three-dimensional templates and reducing agents for the fabrication of nanoporous PtAg (NPS-Pt) and PtCu (NPC-Pt) alloys with hollow ligaments by a simple galvanic replacement reaction with H(2)PtCl(6). Electron microscopy and X-ray diffraction characterizations demonstrate that NPS and NPC with similar ligament sizes (30-50 nm) have different effects on the formed hollow nanostructures. For NPS-Pt, the shell of the hollow ligament is seamless. However, the shell of NPC-Pt is comprised of small pores and alloy nanoparticles with a size of similar to 3 nm. The as-prepared NPS-Pt and NPC-Pt exhibit remarkably improved electrocatalytic activities towards the oxidation of ethanol and H(2)O(2) compared with state-of-the-art Pt/C catalyst, and can be used for sensitive electrochemical sensing applications. The hierarchical nanoporous structure also provides a good microenvironment for enzymes. After immobilization of glucose oxidase (GOx), the enzyme modified nanoporous electrode can sensitively detect glucose in a wide linear range (0.6-20 mM). (C) 2011 Elsevier B.V. All rights reserved.
学科主题	生物传感器技术
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Biophysics ; Biotechnology & Applied Microbiology ; Chemistry, Analytical ; Electrochemistry ; Nanoscience & Nanotechnology
研究领域[WOS]	Biophysics ; Biotechnology & Applied Microbiology ; Chemistry ; Electrochemistry ; Science & Technology - Other Topics
关键词[WOS]	DIRECT ELECTRON-TRANSFER ; CARBON NANOTUBES ; PLATINUM NANOPARTICLES ; HORSERADISH-PEROXIDASE ; HYDROGEN-PEROXIDE ; SOL-GEL ; GOLD ; PLATFORM ; ENZYME ; FILM
收录类别	SCI
语种	英语
WOS记录号	WOS:000295953300026
公开日期	2012-11-10
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn:8080/handle/337004/1217]
专题	青岛生物能源与过程研究所_生物传感技术团队
作者单位	1.Chinese Acad Sci, Lab Nanobioelect & Biosensors, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Peoples R China 2.Chinese Acad Sci, Key Lab Biofuels, Qingdao 266101, Peoples R China 3.Univ Jinan, Sch Chem & Chem Engn, Jinan 250022, Peoples R China
推荐引用方式 GB/T 7714	Xu, Caixia,Liu, Yunqing,Su, Fa,et al. Nanoporous PtAg and PtCu alloys with hollow ligaments for enhanced electrocatalysis and glucose biosensing[J]. BIOSENSORS & BIOELECTRONICS,2011,27(1):160-166.
APA	Xu, Caixia,Liu, Yunqing,Su, Fa,Liu, Aihua,&Qiu, Huajun.(2011).Nanoporous PtAg and PtCu alloys with hollow ligaments for enhanced electrocatalysis and glucose biosensing.BIOSENSORS & BIOELECTRONICS,27(1),160-166.
MLA	Xu, Caixia,et al."Nanoporous PtAg and PtCu alloys with hollow ligaments for enhanced electrocatalysis and glucose biosensing".BIOSENSORS & BIOELECTRONICS 27.1(2011):160-166.