標題: Syntheses of carbon porous materials with varied pore sizes and their performances as catalyst supports during methanol oxidation reaction
作者: Lo, An-Ya
Hung, Chin-Te
Yu, Ningya
Kuo, Cheng-Tzu
Liu, Shang-Bin
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Carbon porous materials;DMFC;Electrocatalyst;Methanol oxidation reaction;CO poisoning
公開日期: 1-Dec-2012
摘要: Carbon porous materials (CPMs) with extended ranges of pore size and morphology were replicated using various porous silicas, such as zeolites, mesoporous silicas, and photonic crystals, as templates by means of chemical vapor infiltration (CV!) method. The micro-, meso-, and macro-porous carbons so fabricated were adopted as supports for the metal (Pt) catalyst for direct methanol fuel cells (DMFCs), and the supported Pt/CPM electrocatalysts were characterized by a variety of different spectroscopic/analytical techniques, viz transmission electron microscopy (TEM), Raman, X-ray photoelectron spectroscopy (XPS), gas physisorption/chemisorption analyses, and cyclic voltammetry (CV). That these Pt/CPMs were found to exhibit superior electrocatalytic activities compared to the commercial Pt/XC-72 with a comparable Pt loading during methanol oxidation reaction (MOR) is attributed to the presence of Pt nanoparticles (NPs; typically 1-3 nm in size) that are highly dispersed in the CPMs, facilitating an improved tolerance for CO poisoning. While the MOR activity observed for various Pt/CPMs tend to increase with increasing pore size of the carbon supports, Pt catalyst supported on carbon substrates possessing microporosities was found to have superior stability in terms of tolerance for CO poisoning than those with greater pore size or having meso- and macroporosities. (C) 2012 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.apenergy.2012.05.043
http://hdl.handle.net/11536/20543
ISSN: 0306-2619
DOI: 10.1016/j.apenergy.2012.05.043
期刊: APPLIED ENERGY
Volume: 100
Issue: 
起始頁: 66
結束頁: 74
Appears in Collections:Conferences Paper


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