Mesoporous silica template-derived nickel-cobalt bimetallic catalyst for urea oxidation and its application in a direct urea/H2O2 fuel cell
- Authors
- Manh Hoang Tran; Park, Bang Ju; Kim, Bo Hyeon; Yoon, Hyon Hee
- Issue Date
- 13-Jan-2020
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Urea oxidation; Urea fuel cell; Electro-catalyst; Ni-Co bimetal hydroxide; Mesoporous silica template
- Citation
- INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.45, no.3, pp.1784 - 1792
- Journal Title
- INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
- Volume
- 45
- Number
- 3
- Start Page
- 1784
- End Page
- 1792
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/26157
- DOI
- 10.1016/j.ijhydene.2019.11.073
- ISSN
- 0360-3199
- Abstract
- Ni-based catalysts are considered as an efficient anode material for urea fuel cells due to the low cost and high activity in alkaline media. Herein, we demonstrate that Ni-Co bimetallic hydroxide particles with highly porous nanostructures can be synthesized using mesoporous silica nanoparticles as templates. The replicated nanostructures of the Ni-Co hydroxide samples from the mesoporous silica templates are observed. The porous Ni0.8Co0.2(OH)(2) particles exhibited considerably enhanced electro-catalytic activity for urea oxidation reaction by providing a high surface area and fast mass transport for urea oxidation reaction. It is also found that the Co-doping at 20% significantly reduce the overpotential and increase the peak current of urea oxidation reaction. A direct urea/H2O2 fuel cell with the porous Ni0.8Co0.2(OH)(2) as anode material shows an excellent performance with maximum power densities of 11.2 and 25.6 mW cm(-2) at 20 degrees C and 70 degrees C with 0.5 M urea in 5 M KOH, respectively. Thus, this work suggests that the highly porous Ni0.8Co0.2(OH)(2)-derived from the mesoporous silica templates can be used for urea oxidation and as an efficient anode material for urea-based fuel cells. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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Collections - 공과대학 > 화공생명공학과 > 1. Journal Articles
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