Improved performance of Pd electrocatalyst supported on three-dimensional nickel foam for direct ethanol fuel cells
| Autor: | Yong-Qing Zhao, Mao-Wen Xu, You-Ling Wang, Dan-Dan Zhao, Hu-Lin Li, Cai-Ling Xu, Zhong-Xing Su |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Catalyst support Metallurgy Energy Engineering and Power Technology chemistry.chemical_element Electrochemistry Electrocatalyst Direct-ethanol fuel cell Nickel chemistry Chemical engineering Electrode Electrical and Electronic Engineering Physical and Theoretical Chemistry Cyclic voltammetry Palladium |
| Zdroj: | Journal of Power Sources. 195:6496-6499 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2010.04.025 |
| Popis: | To improve the performance of direct ethanol fuel cells (DEFCs), a three-dimensional (3D), hierarchically structured Pd electrode has been successfully fabricated by directly electrodepositing Pd nanoparticles on the nickel foam (referred as Pd/Nickel foam electrode hereinafter). The electrochemical properties of the as-prepared electrode for ethanol oxidation have been investigated by cyclic voltammetry (CV). The results show that the oxidation peak current density of the Pd/Nickel foam electrode is 107.7 mA cm −2 , above 8 times than that of Pd film electrode at the same Pd loading (0.11 mg cm −2 ), and a 90 mV negative shift of the onset potential is found on the Pd/Nickel foam electrode compared with the Pd film electrode. Furthermore, the peak current density of the 500th cycle remains 98.1% of the maximum value for the Pd/Nickel foam electrode after a 500-cycle test, whereas it is only 14.2% for the Pd film. The improved electrocatalytic activity and excellent stability of the Pd/Nickel foam electrode make it a favorable platform for direct ethanol fuel cell applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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