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Three-dimensional carbon- and binder-free nickel nanowire arrays as a high-performance and low-cost anode for direct hydrogen peroxide fuel cell
- Source :
- Journal of Power Sources. 300:147-156
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- A novel three-dimensional carbon- and binder-free nickel nanowire arrays (Ni NAs) electrode is successfully fabricated by a facile galvanostatic electrodeposition method using polycarbonate membrane as the template. The Ni NAs electrode achieves a oxidation current density (divided by the electroactive surface areas of Ni) of 25.1 mA cm −2 in 4 mol L −1 KOH and 0.9 mol L −1 H 2 O 2 at 0.2 V (vs. Ag/AgCl) accompanied with a desirable stability, which is significantly higher than the catalytic activity of H 2 O 2 electro-oxidation achieved previously with precious metals as catalysts. The impressive electrocatalytic performance is largely attributed to the superior 3D open structure and high electronic conductivity, which ensures the high utilization of Ni surfaces and makes the electrode have higher electrochemical activity. The apparent activation energy of H 2 O 2 electro-oxidation on the Ni NAs catalyst is 13.59 kJ mol −1 . A direct peroxide–peroxide fuel cell using the Ni NAs as anode exhibits a peak power density of 48.7 mW cm −2 at 20 °C. The electrode displays a great promise as the anode of direct peroxide–peroxide fuel cell due to its low cost, high activity and stability.
- Subjects :
- Materials science
Renewable Energy, Sustainability and the Environment
Nanowire
Energy Engineering and Power Technology
chemistry.chemical_element
Nanotechnology
Electrochemistry
Catalysis
Anode
Nickel
Chemical engineering
chemistry
Electrode
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Carbon
Power density
Subjects
Details
- ISSN :
- 03787753
- Volume :
- 300
- Database :
- OpenAIRE
- Journal :
- Journal of Power Sources
- Accession number :
- edsair.doi...........31a3b39290cdbd04e300e6e07fbc86d9
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2015.09.072