Meta-organic-framework-derived fe-n/c electrocatalyst with five-coordinated fe-n-x), sites for advanced oxygen reduction in acid media
文献类型：期刊论文
| 作者 | Lai, Qingxue1; Zheng, Lirong2; Liang, Yanyu1,3; He, Jianping1; Zhao, Jingxiang4; Chen, Junhong5 |
| 刊名 | Acs catalysis
 |
| 出版日期 | 2017-03-01 |
| 卷号 | 7期号:3页码:1655-1663 |
| 关键词 | Host guest chemistry Confinement effect Fe-n-x sites Five-coordinated configuration Oxygen reduction Electrocatalytic mechanism |
| ISSN号 | 2155-5435 |
| DOI | 10.1021/acscatal.6b02966 |
| 通讯作者 | Liang, yanyu(liangyy403@l26.com) ; Chen, junhong(jhchen@uwm.edu) |
| 英文摘要 | Even though fe-n/c electrocatalysts with abundant fe-n-x active sites have been developed as one of the most promising alternatives to precious metal materials for oxygen reduction reaction (orr), further improvement of their performance requires precise control over fe-n-x sites at the molecular level and deep understanding of the catalytic mechanism associated with each particular structure. herein, we report a host guest chemistry strategy to construct fe-mim nanocluster (nc) (guest)@zeolite imidazole framework 8 (zif-8) (host) precursors that can be transformed into fe-n/c electrocatalysts with controllable structures. the zif-8 host network exhibits a significant host guest relationship dependent confinement effect for the pyrolysis process, resulting in different types of fe-nx sites with two- to five-coordinated configurations on the porous carbon matrix confirmed by x-ray absorption near edge structure ()canes) and fourier transform (ft) extended x-ray absorption fine structure (exafs) spectra. electrochemical tests reveal that the five-coordinated fe-n-x sites can significantly promote the reaction rate in acid media, due to the small orr energy barrier and the low adsorption energy of intermediate oh on these sites suggested by density functional theory (dft) calculations. such a synthesis strategy provides an effective route to realize the controllable construction of highly active sites for orr at the molecular level. |
| WOS关键词 | IRON-BASED CATALYSTS ; MEMBRANE FUEL-CELLS ; FE/N/C-CATALYSTS ; ACTIVE-SITES ; ELECTROREDUCTION ; PHTHALOCYANINE ; POLYANILINE |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Physical |
| 语种 | 英语 |
| WOS记录号 | WOS:000395726500018 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176699 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Liang, Yanyu; Chen, Junhong |
| 作者单位 | 1.Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China 3.Jiangsu Collaborat Innovat Ctr Adv Inorgan Funct, Nanjing 211816, Jiangsu, Peoples R China 4.Harbin Normal Univ, Coll Chem & Chem Engn, Harbin 150025, Peoples R China 5.Univ Wisconsin, Dept Mech Engn, Milwaukee, WI 53211 USA |
| 推荐引用方式 GB/T 7714 | Lai, Qingxue,Zheng, Lirong,Liang, Yanyu,et al. Meta-organic-framework-derived fe-n/c electrocatalyst with five-coordinated fe-n-x), sites for advanced oxygen reduction in acid media[J]. Acs catalysis,2017,7(3):1655-1663. |
| APA | Lai, Qingxue,Zheng, Lirong,Liang, Yanyu,He, Jianping,Zhao, Jingxiang,&Chen, Junhong.(2017).Meta-organic-framework-derived fe-n/c electrocatalyst with five-coordinated fe-n-x), sites for advanced oxygen reduction in acid media.Acs catalysis,7(3),1655-1663. |
| MLA | Lai, Qingxue,et al."Meta-organic-framework-derived fe-n/c electrocatalyst with five-coordinated fe-n-x), sites for advanced oxygen reduction in acid media".Acs catalysis 7.3(2017):1655-1663. |
入库方式： iSwitch采集
来源：高能物理研究所
浏览0
下载0
收藏0
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。