Mesoporous silica template-derived nickel-cobalt bimetallic catalyst for urea oxidation and its application in a direct urea/H2O2 fuel cell |
| |
| Affiliation: | 1. Department of Chemical and Biological Engineering, Gachon University, Seongnam, Gyeonggi-do, 13120, Republic of Korea;2. Department of Electronic Engineering, Gachon University, Seongnam, Gyeonggi-do, 13120, Republic of Korea;1. Sustainable and Renewable Energy Engineering Department, University of Sharjah, 27272, Sharjah, United Arab Emirates;2. Center for Advanced Materials Research, Research Institute of Science and Engineering, University of Sharjah, 27272, Sharjah, United Arab Emirates;3. Chemical Engineering Department, Faculty of Engineering, Minia University, Egypt;4. RAK-Research and Innovation Center, American University of Ras Al Khaimah, 31208, Ras Al Khaimah, United Arab Emirates;1. Dept. of Sustainable and Renewable Energy Engineering, University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates;2. Center for Advanced Materials Research, University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates;3. Chemical Engineering Department, Minia University, Elminia, Egypt;4. Department of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea;5. Dept. of Applied Physics, University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates, United Arab Emirates;6. Dept. of Organic Materials and Fiber Engineering, College of Engineering, Chonbuk National University, Jeonju 61-756, South Korea |
| |
| 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 °C and 70 °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. |
| |
| Keywords: | Urea oxidation Urea fuel cell Electro-catalyst Ni-Co bimetal hydroxide Mesoporous silica template |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
