| Nanoporous PtAg and PtCu alloys with hollow ligaments for enhanced electrocatalysis and glucose biosensing | |
| Xu, Caixia3; Liu, Yunqing3; Su, Fa3; Liu, Aihua1,2; Qiu, Huajun1,2 | |
| 2011-09-15 | |
| 发表期刊 | BIOSENSORS & BIOELECTRONICS
 |
| 卷号 | 27期号:1页码:160-166 |
| 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).; 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. |
| 文章类型 | Article |
| 关键词 | Dealloying Galvanic Replacement Electrocatalyst Hollow Nanostructure Glucose Biosensor |
| 学科领域 | 生物传感器技术 |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences |
| DOI | 10.1016/j.bios.2011.06.036 |
| 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研究方向 | Biophysics ; Biotechnology & Applied Microbiology ; Chemistry ; Electrochemistry ; Science & Technology - Other Topics |
| WOS类目 | Biophysics ; Biotechnology & Applied Microbiology ; Chemistry, Analytical ; Electrochemistry ; Nanoscience & Nanotechnology |
| WOS记录号 | WOS:000295953300026 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qibebt.ac.cn/handle/337004/1217 |
| 专题 | 生物传感技术团队（过去） |
| 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. |
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