Preparation of highly active 40 wt.% Pt/C cathode electrocatalysts for DMFC via different routes
文献类型：期刊论文
| 作者 | Zhou, ZH; Zhou, WJ; Wang, SL; Wang, GX; Jiang, LH; Li, HQ; Sun, GQ; Xin, Q |
| 刊名 | catalysis today
 |
| 出版日期 | 2004-09-01 |
| 卷号 | 93-5页码:523-528 |
| 关键词 | Pt/C cathode electrocatalysts DMFC polyol process aqueous impregnation method |
| 英文摘要 | a series of 40 wt.% pt/c electrocatalysts were prepared by a modified polyol process and an improved aqueous impregnation method with different impregnation time. the characterization results of tem and xrd identically reveal that the size and distribution of pt nanoparticles on carbon are controllable by modifying impregnation time in both routes. high dispersion of pt nanoparticles on carbon is achieved by both methods with 15 min impregnation, while aggregation of pt nanoparticles takes place with prolonging the impregnation time to 36 h, especially in the aqueous impregnation procedure. uv-vis spectroscopy measurements verified that the redox reaction between ptcl62- and formaldehyde could take place at a slow rate under ambient conditions via a two-step reaction path, where ptcl42- serves as an intermediate. on the other hand, ptcl62- anion can be directly reduced to pt-0 above 333 k in the modified polyol process through an autocatalytic pathway. the short-time-impregnated 40 wt.% pt/c as cathode electrocatalysts in direct methanol fuel cell performs better than that of long-time-impregnated electrocatalysts. experimental evidence provides clues for fundamental understanding of elementary steps of the redox reactions, which helps guiding the design and preparation of highly dispersed pt catalyst with high metal loadings for fuel cells. (c) 2004 elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, applied ; chemistry, physical ; engineering, chemical |
| 研究领域[WOS] | chemistry ; engineering |
| 关键词[WOS] | supported platinum catalysts ; fuel-cells ; methanol ; size ; oxygen ; electroreduction ; reduction ; oxides ; growth |
| 收录类别 | ISTP ; SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000223973200074 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/139459]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Direct Methanol Fuel Cell Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, ZH,Zhou, WJ,Wang, SL,et al. Preparation of highly active 40 wt.% Pt/C cathode electrocatalysts for DMFC via different routes[J]. catalysis today,2004,93-5:523-528. |
| APA | Zhou, ZH.,Zhou, WJ.,Wang, SL.,Wang, GX.,Jiang, LH.,...&Xin, Q.(2004).Preparation of highly active 40 wt.% Pt/C cathode electrocatalysts for DMFC via different routes.catalysis today,93-5,523-528. |
| MLA | Zhou, ZH,et al."Preparation of highly active 40 wt.% Pt/C cathode electrocatalysts for DMFC via different routes".catalysis today 93-5(2004):523-528. |
入库方式： OAI收割
来源：大连化学物理研究所
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