Electro-oxidation of ethanol at gas diffusion electrodes a DEMS study
文献类型：期刊论文
| 作者 | Rao, V.; Cremers, C.; Stimming, U.; Cao, Lei; Sun, Shiguo; Yan, Shiyou; Sun, Gongquan; Xin, Qin |
| 刊名 | journal of the electrochemical society
 |
| 出版日期 | 2007 |
| 卷号 | 154期号:11页码:b1138-b1147 |
| 英文摘要 | the ethanol electro-oxidation at gas diffusion electrodes made of different catalysts, pt/c, ptru(1:1)/c, and ptsn(7:3)/c, were studied by on-line differential electrochemical mass spectrometry in a wide temperature range (30-90 degrees c) as a function of the anode potential, the fuel concentration, and catalyst loading. the co2 current efficiency (cce) of the ethanol oxidation reaction (eor) exhibits a maximum at about 0.6 v and decreases rapidly with further increasing potentials. the cce for the eor goes down with the increase in concentration of ethanol. cce for ethanol oxidation reaction shows a strong increase with increasing catalyst loading. the cce increases with increasing temperature, exceeding 75% at 90 degrees c, 0.1 m ethanol, and 5 mg/cm(2) pt catalyst loading. ptsn/c shows high cce, like pt/c. but ptru/c exhibits very small cce. of the intermediates, acetaldehyde is quite active for further oxidation. but acetic acid is fairly resistant against further oxidation. our results indicate that the c-c bond scission observed for the eor with cce in excess of 50% has to proceed in parallel with ethanol oxidation to either acetaldehyde or acetic acid, and not sequentially from acetic acid further on, as acetic acid cannot be oxidized any further. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | electrochemistry ; materials science, coatings & films |
| 研究领域[WOS] | electrochemistry ; materials science |
| 关键词[WOS] | fuel-cell ; methanol oxidation ; mass-spectrometry ; quantitative dems ; catalysts ; surface ; ptru ; spectroscopy ; dafc ; acid |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000249787900021 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/140676]  |
| 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.Tech Univ Munich, Dept Phys E19, D-85748 Garching, Germany 2.Bavarian Ctr Appl Energy Res ZAE Bayern, D-85748 Garching, Germany 3.Dalian Inst Chem Phys, Direct Alcohol Fuel Cell Grp, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Rao, V.,Cremers, C.,Stimming, U.,et al. Electro-oxidation of ethanol at gas diffusion electrodes a DEMS study[J]. journal of the electrochemical society,2007,154(11):b1138-b1147. |
| APA | Rao, V..,Cremers, C..,Stimming, U..,Cao, Lei.,Sun, Shiguo.,...&Xin, Qin.(2007).Electro-oxidation of ethanol at gas diffusion electrodes a DEMS study.journal of the electrochemical society,154(11),b1138-b1147. |
| MLA | Rao, V.,et al."Electro-oxidation of ethanol at gas diffusion electrodes a DEMS study".journal of the electrochemical society 154.11(2007):b1138-b1147. |
入库方式： OAI收割
来源：大连化学物理研究所
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