In situ trapped high-density single metal atoms within graphene: Iron-containing hybrids as representatives for efficient oxygen reduction
Liu, DB; Wu, CQ; Chen, SM; Ding, SQ; Xie, YF; Wang, CD; Wang, T; Haleem, YA; Rehman, ZU; Sang, Y; Liu, Q; Zheng, XS; Wang, Y; Ge, BH; Xu, HX; Song, L
2018
发表期刊NANO RESEARCH
ISSN1998-0124
卷号11期号:4页码:2217-2228
文章类型期刊论文
摘要Atomically dispersed catalysts have attracted attention in energy conversion applications because their efficiency and chemoselectivity for special catalysis are superior to those of traditional catalysts. However, they have limitations owing to the extremely low metal-loading content on supports, difficulty in the precise control of the metal location and amount as well as low stability at high temperatures. We prepared a highly doped single metal atom hybrid via a single-step thermal pyrolysis of glucose, dicyandiamide, and inorganic metal salts. High-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) and X-ray absorption fine structure spectroscopy (XAFS) revealed that nitrogen atoms doped into the graphene matrix were pivotal for metal atom stabilization by generating a metal-N-x coordination structure. Due to the strong anchoring effect of the graphene matrix, the metal loading content was over 4 wt.% in the isolated atomic hybrid (the Pt content was as high as 9.26 wt.% in the Pt-doped hybrid). Furthermore, the single iron-doped hybrid (Fe@N-doped graphene) showed a remarkable electrocatalytic performance for the oxygen reduction reaction. The peak power density was similar to 199 mW.cm(-2) at a current density of 310 mA.cm(-2) and superior to that of a commercial Pt/C catalyst when it was used as a cathode catalyst in assembled zinc-air batteries. This work offered a feasible approach to design and fabricate highly doped single metal atoms (SMAs) catalysts for potential energy applications.
关键词Ray-absorption Spectroscopy Nitrogen-doped Graphene Electrochemical Reactions Carbon Nanotubes Porous Carbon Catalyst Platinum Electrocatalysts Nanoparticles Nitride
DOI10.1007/s12274-017-1840-8
收录类别SCI
语种英语
WOS记录号WOS:000427907700041
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29046
专题中科院上海应用物理研究所2011-2018年
作者单位1.Liu, DB
2.Wu, CQ
3.Chen, SM
4.Ding, SQ
5.Xie, YF
6.Wang, CD
7.Wang, T
8.Haleem, YA
9.Rehman, ZU
10.Sang, Y
11.Liu, Q
12.Zheng, XS
13.Wang, Y
14.Ge, BH
15.Xu, HX
16.Song, L
推荐引用方式
GB/T 7714
Liu, DB,Wu, CQ,Chen, SM,et al. In situ trapped high-density single metal atoms within graphene: Iron-containing hybrids as representatives for efficient oxygen reduction[J]. NANO RESEARCH,2018,11(4):2217-2228.
APA Liu, DB.,Wu, CQ.,Chen, SM.,Ding, SQ.,Xie, YF.,...&Song, L.(2018).In situ trapped high-density single metal atoms within graphene: Iron-containing hybrids as representatives for efficient oxygen reduction.NANO RESEARCH,11(4),2217-2228.
MLA Liu, DB,et al."In situ trapped high-density single metal atoms within graphene: Iron-containing hybrids as representatives for efficient oxygen reduction".NANO RESEARCH 11.4(2018):2217-2228.
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