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| Porous carbon electrocatalyst with exclusive metal-coordinate active sites for acidic oxygen reduction reaction | |
| Zhang, Q; Wang, JH; Yu, PW; Song, F; Yin, X; Chen, RJ; Nie, HL; Zhang, X; Yang, WL | |
| 2018 | |
| Source Publication | CARBON
 |
| ISSN | 0008-6223 |
| Volume | 132Pages:85-94 |
| Subtype | 期刊论文 |
| Abstract | A porous P-doped M/N/C electrocatalyst with high-surface-area (up to 1312 m(2) g(-1)) was prepared by annealing a mixture of triphenylphosphine, polyaniline, phthalocyanine iron (II), and phthalocyanine cobalt (II). The synthesis involves hard templating with silica nanoparticles, followed by NH3 activation. Along with low metal loading (Fe loading = 0.46 wt. %; Co loading = 0.26 wt. %), the resulting P-doped M/N/C exhibits an excellent ORR activity and durability in acidic media. The half-wave potential difference of the catalyst for ORR is only similar to 53 mV negative relative to the benchmarked Pt/C (360 mu g Pt) at the same loading. More importantly, transmission electron microscopy, X-ray absorption fine structure spectra, and electrochemical poisoning by SCN- ion suggested that exclusive metal-coordinate catalytic active sites such as Fe-N-6 and Co-N-4, are involved in ORR. Moreover, as-prepared P-doped M/N/C catalysts with bimetallic catalytic active sites exhibit superior electrochemical performance compared to catalysts with single metal active sites. These results represent an important step towards rational design of high-performance ORR electrocatalysts for polymer exchange membrane fuel cells. (C) 2018 Elsevier Ltd. All rights reserved. |
| Keyword | X-ray-absorption Nitrogen-doped Carbon Electrolyte Fuel-cells Electrochemical Performance Fine-structure Catalysts Iron Fe Orr Spectroscopy |
| DOI | 10.1016/j.carbon.2018.02.019 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000428233000011 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/29104 |
| Collection | 中科院上海应用物理研究所2011-2018年 |
| Affiliation | 1.Zhang, Q 2.Wang, JH 3.Yu, PW 4.Song, F 5.Yin, X 6.Chen, RJ 7.Nie, HL 8.Zhang, X 9.Yang, WL |
| Recommended Citation GB/T 7714 | Zhang, Q,Wang, JH,Yu, PW,et al. Porous carbon electrocatalyst with exclusive metal-coordinate active sites for acidic oxygen reduction reaction[J]. CARBON,2018,132:85-94. |
| APA | Zhang, Q.,Wang, JH.,Yu, PW.,Song, F.,Yin, X.,...&Yang, WL.(2018).Porous carbon electrocatalyst with exclusive metal-coordinate active sites for acidic oxygen reduction reaction.CARBON,132,85-94. |
| MLA | Zhang, Q,et al."Porous carbon electrocatalyst with exclusive metal-coordinate active sites for acidic oxygen reduction reaction".CARBON 132(2018):85-94. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Porous carbon electr（2544KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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