碳化细菌纤维素负载铂用于直接甲醇燃料电池高性能电极催化剂的制备及其机理
关键词 碳化细菌纤文素 三文网络结构 直接甲醇燃料电池 阳极催化剂
毕业设计说明书（论文）外文摘要
Title An advanced direct methanol fuel cells electrocatalyst fabricated with carbonized bacterial cellulose loading platinum and the research of its working mechanism
Abstract
Owing to the unique three-dimensional network structure, high purity, high crystallinity and a high degree of polymerization, bacterial cellulose(BC) has great advantages in the field of materials engineering. Using carbonization, renewable biomaterial of BC was converted into carbonized bacterial cellulose (CBC), which was an excellent high degree of graphitization carbonized material, is an excellent alternative promising candidate material to the fuel cell anode catalyst support material. The experiment on the basis of previous work use bacterial cellulose membrane from Acetobacter xylinum static fermentation to carbonized, the research using different temperatures (600℃, 800℃, 1000℃) carbonized bacterial cellulose by chemical reduction method prepared different activities and morphology of Pt nanoparticles on CBC (Pt/CBC). Studied the catalytic performance of the direct methanol fuel cell catalysts. Then the catalyst was characterized with XRD, BET, XPS, TEM, Raman, electrochemical performance testing. Comparing with the different carbonized conditions of electrocatalyst, the performance of the catalyst becomes more excellent with increasing temperature carbonization ,1000℃Pt/CBC behaves the optimum performance of catalyst. Compared with commercial carbon powder (Vulcan), its electrochemically active surface area was increased from 37.20m2/gPt to 63.10m2/gPt and the BET surface area (SBET) was increased from 108.26m2/g to 303.27m2/g, Pt/CBC catalyst was observed superior electrocatalytic activity toward methanol oxidation resistance with an improved tolerance to poisoning species in methanol electro-oxidation process.
Keywords carbonized bacterial cellulose, three-dimensional network, direct methanol fuel cell, anode catalyst
目 次
1 绪论 1
1.1 课题研究背景 1
1.2 燃料电池概述 1
1.2.1 燃料电池的原理 1
1.2.2 燃料电池的特点 2
1.3 直接甲醇燃料电池 2
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