A dendritic palladium electrode for a hydrogen peroxide sensor fabricated by electrodeposition on a dynamic hydrogen-bubble template and dealloying
- Authors
- An, Chang Yong; Zhuo, Kai; Kim, Woo-Jae; Chung, Chan-Hwa
- Issue Date
- 5-Jul-2015
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Dendritic Pd electrode; Dynamic hydrogen template; Dealloying; Electrochemical sensor; Hydrogen peroxide
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.213, pp.329 - 333
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 213
- Start Page
- 329
- End Page
- 333
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/10317
- DOI
- 10.1016/j.snb.2015.02.085
- ISSN
- 0925-4005
- Abstract
- A dendritic Pd-Cu electrode has been prepared by co-electrodeposition of palladium and copper with high cathodic over-potentials, in which hydrogen evolution occurred. The dendritic Pd-Cu was electrochemically de-alloyed to selectively remove copper. This de-alloyed Pd-(Cu) electrode has a dramatically increased surface-area that is appropriate for electrochemical sensor applications. Electrode characteristics for use as a non-enzymatic sensor were monitored by cyclic voltammetry and amperometry, in which detection signals for hydrogen peroxide (H2O2) were precisely measured. The prepared dendritic Pd-( Cu) electrode demonstrated outstanding electrocatalytic activity for H2O2 reduction with a detection limit of 1.78 x 10(-8) M, a wide dynamic range of 50 mu M to 10 mM, and high sensitivity of 915.25 mu A cm(-2) mM(-1). (C) 2015 Elsevier B.V. All rights reserved.
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