Studies on the Improvement of catalytic performance for direct methanol fuel cell

直接甲醇燃料电池催化性能改进研究

• 批准号: 15560669
• 负责人: KOBAYASHI Koichi
• 金额: $ 2.05万
• 依托单位: Musashi Institute of technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560669/
• 关键词: DMFC; Anode catalyst; Anti CO tolerance; Pt-Ru-Sn catalyst; Pt-Ru-Fe catalyst; Cyclic Voltammetry; アノード電極触媒; Pt-Ru-Sn系触媒; 直接メタノール形燃料電池; サイクロボルタンメトリー; CO被毒; Pt-Ru-Sn合金触媒; 直接メタノール型燃料電池; アルコール還元法; 白金-ルテニウムナノ粒子; 燃料電池用触媒; メタノールの酸化活性; 酸素還元

Direct methanol fuel cells(DMFC) have been received much attention because of their characteristics such as high energy conversion efficiency, low pollutant emission, high energy density of methanol, and fuel availability. However, there are some problems, inhibiting the application of DMFC. These problems to be solved involve the low activity of methanol and CO_2 tolerance. To enhance the catalytic activity of methanol oxidation, there are intensive researches on Pt alloy catalysts that minimize the catalyst poisoning.In the present work, the highly dispersed Pt and Pt-Ru alloy particles on carbon support were prepared by alcohol-reduction method using polyvinylpyrolidone as a stabilizer, and by chemical reduction method using reverse microemulsion. The prepared catalysts were characterized by UV-visible spectroscopy, x-ray diffraction, electron microscopy, x-ray photoelectron spectroscopy, cyclic voltammetry, and CO striping method. The former method has advantages over simplicity an … More d straight reduction of chloride salt without any modification. In the latter case, the average size of nanoparticle was ca. 2-4 nm with narrow distribution. Moreover, they are homogeneously dispersed on carbon support. It is cleared that the particle size of nanoparticle was dependent on the water volume in microemulsion. In addition, CO stripping voltammetry and the electrochemical oxidations of CO/H_2 and methanol showed that the synthesized bimetallic particles had a high surface area and a good catalytic activity for the oxidations of CO and methanol.The preparation and characterization of Pt_3Ru_2Sn and Pt-Ru-Fe catalysts were investigated. The catalytic activity of Pt-Ru-Sn catalyst was significantly higher than that of Pt-Ru. Sn in ternary alloy catalyst modified the Pt electric structure without the large increase of Pt-Pt bond distance, which may enhance the catalytic activity for methanol oxidation by improving CO tolerance. Next, the catalytic activity of Pt_3Ru_2Fe catalyst was studied. The activity of methanol oxidation of Pt_3Ru_2Fe catalyst was 2.5 times higher than that of Pt-Ru catalyst by the enhanced CO tolerance. Less

直接甲醇燃料电池（DMFC）具有能量转化效率高、污染物排放低、甲醇能量密度高、燃料易得等优点，受到了广泛关注。但是，DMFC还存在一些问题，制约了DMFC的应用。这些问题涉及到甲醇和CO_2耐受活性低。为了提高甲醇氧化催化活性，研究了以聚乙烯吡咯烷酮为稳定剂，采用醇还原法和反相微乳液化学还原法制备了高分散的Pt和Pt-Ru合金颗粒。采用紫外-可见光谱、X射线衍射、电子显微镜、X射线光电子能谱、循环伏安和CO溶出等方法对催化剂进行了表征。前一种方法具有简单、 ...更多信息 d直接还原氯化物盐而不进行任何改性。在后一种情况下，纳米颗粒的平均尺寸为约100 μ m。2-4 nm，分布窄。此外，它们均匀地分散在碳载体上。结果表明，微乳液中水的体积对纳米粒子的粒径有明显的影响。此外，CO溶出伏安法和CO/H_2和甲醇的电化学氧化实验表明，所合成的Pt_3Ru_2Sn和Pt-Ru-Fe催化剂具有较高的比表面积和良好的催化活性。Pt-Ru-Sn催化剂的催化活性明显高于Pt-Ru催化剂。Sn的加入改变了Pt的电性结构，但没有明显增加Pt-Pt键距，这可能是通过提高催化剂对CO的耐受性来提高催化剂的甲醇氧化活性。其次，研究了Pt_3Ru_2Fe催化剂的催化活性。Pt_3Ru_2Fe催化剂对甲醇的氧化活性比Pt-Ru催化剂提高了2.5倍。少

项目成果

Preparation of carbon-supported Pt and Pt alloy catalysts by alcohol reduction for polymer electrolyte fuel cells

醇还原制备碳载Pt及Pt合金催化剂用于聚合物电解质燃料电池

• 发表时间: 2003
• 期刊: Transactions of the Materials Research Society of Japan 28
• 作者: Taeyoon Kim;K.Kobayashi
• 通讯作者: K.Kobayashi

Preparation and characterization of carbon supported Pt and PtRu alloy catalysts reduced by alcohol for polymer electrolyte fuel cell

• DOI: 10.1016/j.electacta.2004.01.124
• 发表时间: 2004-11
• 期刊: Electrochimica Acta
• 影响因子: 6.6
• 作者: Taeyoon Kim;Masashi Takahashi;M. Nagai;Koichi Kobayashi

図解雑学 燃料電池

图解燃料电池知识问答

• 发表时间: 2004
• 作者: 小林 光一;高橋 政志
• 通讯作者: 高橋 政志

小林光一, 高橋政志: "図解雑学 燃料電池"ナツメ社. 227 (2004)

Koichi Kobayashi、Masashi Takahashi：《燃料电池琐事图解》Natsumesha 227 (2004)。

Preparation of carbon-supported Pt and alloy catalysts by alcohol reduction for polymer electrolyte fuel cells

醇还原制备碳载Pt及合金催化剂用于聚合物电解质燃料电池

• 发表时间: 2003
• 期刊: Transactions of the Materials Research Society of Japan 28
• 作者: Taeyoon Kim;Koichi Kobayashi
• 通讯作者: Koichi Kobayashi