One step synthesis of carbon-supported Ag/MnyOx composites for oxygen reduction reaction in alkaline media
文献类型：期刊论文
| 作者 | Tang, Qiwen1,2; Jiang, Luhua1; Qi, Jing1,2; Jiang, Qian1,2; Wang, Suli1; Sun, Gongquan1 |
| 刊名 | applied catalysis b-environmental
 |
| 出版日期 | 2011-05-18 |
| 卷号 | 104期号:3-4页码:337-345 |
| 关键词 | Oxygen reduction reaction Alkaline media Manganese oxide Silver One step synthesis |
| 英文摘要 | carbon-supported ag/mnyox composites were prepared by a one step synthesis method, i.e., silver permanganate pyrolysis at different temperatures. the physical and electrochemical properties of the obtained composites were characterized by x-ray diffraction (xrd), transmission electron microscopy (tem), energy-dispersive x-ray spectroscopy (edx) and cyclic voltammetry (cv). the electrochemical activity, selectivity and stability for the ag/mnyox/c composites toward oxygen reduction reaction (orr) in alkaline media were investigated by rotating (ring)-disk electrode (r(r)de) technique. the xrd results show that the manganese oxides were converted from mno2 to mn3o4 and then to mno gradually with increasing temperature. among all the ag/mnyox/c composites, ag/mn3o4/c obtained at 400 degrees c exhibits the highest activity toward the orr. compared with the ag/c, mn3o4/c and the physical mixture of ag/c and mn3o4/c with the same metal loadings, the orr activity of the ag/mn3o4/c is improved significantly, suggesting a synergic effect between ag and mn3o4. at an overpotential of 0.35 v. the calculated apparent activation energy for the orr on the ag/mn3o4/c catalyst is 56 kj mol(-1), which is apparently higher than that on a pt/c catalyst (36 kj mol(-1)). the results from both koutecicy-levich plots of the orr and the rrde measurements suggest that the orr proceeds via a 4-electron pathway on the ag/mn3o4/c composite. moreover, the presence of methanol has little influence on the orr activity toward the ag/mn3o4/c catalyst. the accelerated aging tests indicate that the ag/mn3o4/c is more stable than the pt/c in 0.1 m naoh solution. crown copyright (c) 2011 published by elsevier b.v. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, physical ; engineering, environmental ; engineering, chemical |
| 研究领域[WOS] | chemistry ; engineering |
| 关键词[WOS] | manganese oxides ; platinum nanoparticles ; air cathode ; fuel-cells ; catalysts ; oxidation ; electrode ; methanol ; electrocatalysis ; nanostructures |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000291182100018 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/142506]  |
| 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 Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 10049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Qiwen,Jiang, Luhua,Qi, Jing,et al. One step synthesis of carbon-supported Ag/MnyOx composites for oxygen reduction reaction in alkaline media[J]. applied catalysis b-environmental,2011,104(3-4):337-345. |
| APA | Tang, Qiwen,Jiang, Luhua,Qi, Jing,Jiang, Qian,Wang, Suli,&Sun, Gongquan.(2011).One step synthesis of carbon-supported Ag/MnyOx composites for oxygen reduction reaction in alkaline media.applied catalysis b-environmental,104(3-4),337-345. |
| MLA | Tang, Qiwen,et al."One step synthesis of carbon-supported Ag/MnyOx composites for oxygen reduction reaction in alkaline media".applied catalysis b-environmental 104.3-4(2011):337-345. |
入库方式： OAI收割
来源：大连化学物理研究所
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