期刊
APPLIED CATALYSIS A-GENERAL
卷 429, 期 -, 页码 39-47出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2012.04.002
关键词
PtNi catalysts; Electrocatalytic oxidations; Glycerol; Fuel cells; Biomass
资金
- National Research Foundation (NRF)
- Korea government [20120016600]
- Global Frontier R&D Program on Center for Multiscale Energy [0420-20110157]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Knowledge Economy of the Korea government [20093020030020-11-1-000]
The electrocatalytic oxidation of glycerol was studied using carbon-supported 20 wt.% PtNi (PtNi/C) catalysts, which were prepared with different Pt:Ni atomic ratios from 3:1 to 1:1 using a colloidal method combined with a freeze-drying procedure. The bimetallic PtNi/C catalysts were characterized by various physicochemical analyses, including X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) measurements indicated that the addition of Ni with a Pt catalyst significantly improved the electrocatalytic activity for glycerol electrooxidation. Among the tested catalysts, the Pt2Ni1/C catalyst had approximately 61% higher mass activity than the Pt/C catalyst. Structural modification via lattice parameter change and electronic modification in the unfilled d band states for Pt atoms may kinetically facilitate the electrooxidation of glycerol with an increased exchange current density over the PtNi/C catalysts. (C) 2012 Elsevier B.V. All rights reserved.
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