期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 39, 页码 16474-16479出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta02586e
关键词
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资金
- National Natural Science Foundation of China [51271205, 50801070]
- The Fundamental Research Funds for the Central Universities [11lgpy08]
- Guangzhou Pearl Technology the Nova Special Project [2012J2200058]
- Research and Application of Key Technologies Oriented the Industrial Development [90035-3283309]
- Plan of Science and Technology Project by the DaYa Gulf district in Huizhou city [31000-4207387]
- Sun Yat-sen University
- Foundation for Distinguished Young Teachers in Higher Education of Guangdong, China [Yq2013006]
- SUNY Buffalo
Nanoporous gold (NPG) films were fabricated on Ni foam substrates via a two-step procedure which involves electrodeposition of Au-Sn alloy films on the Ni foam surface, followed by selectively leaching the Sn component through a chemical dealloying process. Pd nanoparticles were then electrochemically deposited on the NPG/Ni foam electrode. The morphology of the Pd-decorated NPG/Ni foam composite electrode (Pd@NPG/Ni foam) was characterized by scanning electron microscopy (SEM). The catalytic activity of the Pd@NPG/Ni foam composite electrode toward H2O2 electroreduction in acid media was evaluated by means of linear scan voltammetry and chronoamperometry. The Pd@NPG/Ni foam composite electrode exhibited high activity and excellent stability for the H2O2 electroreduction, generating a current density of 178 mA cm(-2) at 0 V in a 0.5 M H2SO4 + 0.6 M H2O2 electrolyte, in comparison to 98 mA cm-2 on the Pd@Ni foam electrode and 36 mA cm(-2) on the NPG/Ni foam electrode. The developed three-dimensional (3D) hierarchical porous Pd@NPG/Ni foam can therefore be considered as a promising type of electrode for fuel cell applications.
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