A three-dimensional hierarchical nanoporous PdCu alloy for enhanced electrocatalysis and biosensing

Aihua Liu; Haoran Geng; Caixia Xu; Huajun Qiu

doi:10.1016/j.aca.2011.07.039

A three-dimensional hierarchical nanoporous PdCu alloy for enhanced electrocatalysis and biosensing

Aihua Liu
, Haoran Geng
, Caixia Xu
, Huajun Qiu^*

^*Corresponding author for this work

CAS - Qingdao Institute of Biomass Energy and Bioprocess Technology
University of Jinan

Research output: Contribution to journal › Article › peer-review

63 Scopus citations

Abstract

Nanoporous copper (NPC) obtained by dealloying CuAl alloy is used as both three-dimensional template and reducing agent for the fabrication of nanoporous PdCu alloy with hollow ligaments by a simple galvanic replacement reaction with H ₂PdCl ₄ aqueous solution. Electron microscopy and X-ray diffraction characterizations demonstrate that after the replacement reaction, the ligaments become hollow tubular structure and the ligament shell is also comprised of small pores and nanoparticles with a typical size of ∼4nm (third order porosity). The as-prepared nanotubular mesoporous PdCu alloy (NM-PdCu) structure exhibits remarkably improved electrocatalytic activity towards the oxidation of formic acid and H ₂O ₂ compared with nanoporous Pd (NP-Pd), and can be used for sensitive electrochemical sensing applications. After coupled with glucose oxidase (GOx), the enzyme modified NM-PdCu electrode can sensitively detect glucose over a wide linear range (0.5-20mM).

Original language	English
Pages (from-to)	172-178
Number of pages	7
Journal	Analytica Chimica Acta
Volume	703
Issue number	2
DOIs	https://doi.org/10.1016/j.aca.2011.07.039
State	Published - 10 Oct 2011
Externally published	Yes

Keywords

Dealloying
Formic acid
Galvanic replacement
Glucose biosensor
Hollow nanostructure

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10.1016/j.aca.2011.07.039

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@article{cce38503ed644962a3a6661137f8dc57,

title = "A three-dimensional hierarchical nanoporous PdCu alloy for enhanced electrocatalysis and biosensing",

abstract = "Nanoporous copper (NPC) obtained by dealloying CuAl alloy is used as both three-dimensional template and reducing agent for the fabrication of nanoporous PdCu alloy with hollow ligaments by a simple galvanic replacement reaction with H 2PdCl 4 aqueous solution. Electron microscopy and X-ray diffraction characterizations demonstrate that after the replacement reaction, the ligaments become hollow tubular structure and the ligament shell is also comprised of small pores and nanoparticles with a typical size of ∼4nm (third order porosity). The as-prepared nanotubular mesoporous PdCu alloy (NM-PdCu) structure exhibits remarkably improved electrocatalytic activity towards the oxidation of formic acid and H 2O 2 compared with nanoporous Pd (NP-Pd), and can be used for sensitive electrochemical sensing applications. After coupled with glucose oxidase (GOx), the enzyme modified NM-PdCu electrode can sensitively detect glucose over a wide linear range (0.5-20mM).",

keywords = "Dealloying, Formic acid, Galvanic replacement, Glucose biosensor, Hollow nanostructure",

author = "Aihua Liu and Haoran Geng and Caixia Xu and Huajun Qiu",

year = "2011",

month = oct,

day = "10",

doi = "10.1016/j.aca.2011.07.039",

language = "英语",

volume = "703",

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journal = "Analytica Chimica Acta",

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TY - JOUR

T1 - A three-dimensional hierarchical nanoporous PdCu alloy for enhanced electrocatalysis and biosensing

AU - Liu, Aihua

AU - Geng, Haoran

AU - Xu, Caixia

AU - Qiu, Huajun

PY - 2011/10/10

Y1 - 2011/10/10

N2 - Nanoporous copper (NPC) obtained by dealloying CuAl alloy is used as both three-dimensional template and reducing agent for the fabrication of nanoporous PdCu alloy with hollow ligaments by a simple galvanic replacement reaction with H 2PdCl 4 aqueous solution. Electron microscopy and X-ray diffraction characterizations demonstrate that after the replacement reaction, the ligaments become hollow tubular structure and the ligament shell is also comprised of small pores and nanoparticles with a typical size of ∼4nm (third order porosity). The as-prepared nanotubular mesoporous PdCu alloy (NM-PdCu) structure exhibits remarkably improved electrocatalytic activity towards the oxidation of formic acid and H 2O 2 compared with nanoporous Pd (NP-Pd), and can be used for sensitive electrochemical sensing applications. After coupled with glucose oxidase (GOx), the enzyme modified NM-PdCu electrode can sensitively detect glucose over a wide linear range (0.5-20mM).

AB - Nanoporous copper (NPC) obtained by dealloying CuAl alloy is used as both three-dimensional template and reducing agent for the fabrication of nanoporous PdCu alloy with hollow ligaments by a simple galvanic replacement reaction with H 2PdCl 4 aqueous solution. Electron microscopy and X-ray diffraction characterizations demonstrate that after the replacement reaction, the ligaments become hollow tubular structure and the ligament shell is also comprised of small pores and nanoparticles with a typical size of ∼4nm (third order porosity). The as-prepared nanotubular mesoporous PdCu alloy (NM-PdCu) structure exhibits remarkably improved electrocatalytic activity towards the oxidation of formic acid and H 2O 2 compared with nanoporous Pd (NP-Pd), and can be used for sensitive electrochemical sensing applications. After coupled with glucose oxidase (GOx), the enzyme modified NM-PdCu electrode can sensitively detect glucose over a wide linear range (0.5-20mM).

KW - Dealloying

KW - Formic acid

KW - Galvanic replacement

KW - Glucose biosensor

KW - Hollow nanostructure

UR - https://www.scopus.com/pages/publications/80052272309

U2 - 10.1016/j.aca.2011.07.039

DO - 10.1016/j.aca.2011.07.039

M3 - 文章

C2 - 21889631

AN - SCOPUS:80052272309

SN - 0003-2670

VL - 703

SP - 172

EP - 178

JO - Analytica Chimica Acta

JF - Analytica Chimica Acta

IS - 2

ER -

A three-dimensional hierarchical nanoporous PdCu alloy for enhanced electrocatalysis and biosensing

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Keywords

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