Nanocrystal supracrystal-derived atomically dispersed Mn-Fe catalysts with enhanced oxygen reduction activity
文献类型:期刊论文
作者 | Wang, BW (Wang, Biwei)[ 1,2 ]; Zou, JX (Zou, Jinxiang)[ 1,2 ]; Shen, XC (Shen, Xiaochen)[ 3 ]; Yang, YC (Yang, Yuchi)[ 1,2 ]; Hu, GZ (Hu, Guangzhi)[ 4 ]; Li, W (Li, Wei)[ 1,2 ]; Peng, ZM (Peng, Zhenmeng)[ 3 ]; Banham, D (Banham, Dustin)[ 5 ]; Dong, AG (Dong, Angang)[ 1,2 ]; Zhao, DY (Zhao, Dongyuan)[ 1,2 ] |
刊名 | NANO ENERGY |
出版日期 | 2019 |
卷号 | 63期号:9页码:1-10 |
ISSN号 | 2211-2855 |
关键词 | Self-assembly Nanocrystal Dual-metal catalyst Oxygen reduction reaction Electrocatalyst |
DOI | 10.1016/j.nanoen.2019.06.047 |
英文摘要 | Iron-nitrogen-carbon (Fe-N-C) materials featuring Fe-N-4 moieties are promising candidates to replace commercial PVC catalysts for the oxygen reduction reaction (ORR). Here we report a novel Mn-Fe-N/S@mC catalyst comprising atomically dispersed Fe-N-4 sites and a trace amount of Mn-N2S2 sites, which are homogeneously anchored on an ordered mesoporous graphitic carbon framework. This dual-metal catalyst is realized based on the chemical conversion of self-assembled Mn0.43Fe2.57O4 nanocrystal supracrystals, with the dual metal sites and the graphitic framework derived from nanocrystal cores and the associated capping ligands, respectively. When evaluated as electrocatalysts for the ORR, Mn-Fe-N/S@mC exhibits excellent catalytic activity in alkaline media, outperforming conventional PVC and most non-precious-metal catalysts reported previously. Notably, the synergistic effect of having Fe and Mn together improves the catalytic activity by a factor of similar to 5. To better understand the high efficiency of Mn doping in enhancing the activity of Fe-N-4 sites, density functional theory calculations were carried out, revealing that the synergistic interaction between the dual metal sites reduces the *OH reduction energy barrier during the oxygen reduction pathway. |
WOS记录号 | WOS:000480422400039 |
源URL | [http://ir.xjipc.cas.cn/handle/365002/7129] |
专题 | 新疆理化技术研究所_省部共建新疆特有药用资源利用重点实验室 |
作者单位 | 1.Guangdong Dowstone Technol Co Ltd, Foshan 528000, Peoples R China 2.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China 3.Univ Akron, Dept Chem & Biomol Engn, Akron, OH 44325 USA 4.Fudan Univ, iChem, Dept Chem, Shanghai 200433, Peoples R China 5.Fudan Univ, iChem, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200433, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, BW ,Zou, JX ,Shen, XC ,et al. Nanocrystal supracrystal-derived atomically dispersed Mn-Fe catalysts with enhanced oxygen reduction activity[J]. NANO ENERGY,2019,63(9):1-10. |
APA | Wang, BW .,Zou, JX .,Shen, XC .,Yang, YC .,Hu, GZ .,...&Zhao, DY .(2019).Nanocrystal supracrystal-derived atomically dispersed Mn-Fe catalysts with enhanced oxygen reduction activity.NANO ENERGY,63(9),1-10. |
MLA | Wang, BW ,et al."Nanocrystal supracrystal-derived atomically dispersed Mn-Fe catalysts with enhanced oxygen reduction activity".NANO ENERGY 63.9(2019):1-10. |
入库方式: OAI收割
来源:新疆理化技术研究所
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。