Porous carbon electrocatalyst with exclusive metal-coordinate active sites for acidic oxygen reduction reaction

doi:10.1016/j.carbon.2018.02.019

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	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
ISSN	0008-6223
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
DOI	10.1016/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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