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
发表期刊CARBON
ISSN0008-6223
卷号132页码:85-94
文章类型期刊论文
摘要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.
关键词X-ray-absorption Nitrogen-doped Carbon Electrolyte Fuel-cells Electrochemical Performance Fine-structure Catalysts Iron Fe Orr Spectroscopy
DOI10.1016/j.carbon.2018.02.019
收录类别SCI
语种英语
WOS记录号WOS:000428233000011
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29104
专题中科院上海应用物理研究所2011-2018年
作者单位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
推荐引用方式
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.
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