Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy
文献类型：期刊论文
| 作者 | Miao, ZP; Wang, XM; Tsai, MC; Jin, QQ; Liang, JS; Ma, F; Wang, TY; Zheng, SJ; Hwang, BJ; Huang, YH |
| 刊名 | ADVANCED ENERGY MATERIALS
 |
| 出版日期 | 2018-08-27 |
| 卷号 | 8期号:24页码:- |
| 关键词 | electrocatalysis energy conversion fuel cells oxygen reduction reaction single atom catalyst |
| ISSN号 | 1614-6832 |
| DOI | 10.1002/aenm.201801226 |
| 英文摘要 | The development of high-performance oxygen reduction reaction (ORR) catalysts derived from non-Pt group metals (non-PGMs) is urgent for the wide applications of proton exchange membrane fuel cells (PEMFCs). In this work, a facile and cost-efficient supramolecular route is developed for making non-PGM ORR catalyst with atomically dispersed Fe-N-x/C sites through pyrolyzing the metal-organic polymer coordinative hydrogel formed between Fe3+ and -L-guluronate blocks of sodium alginate (SA). High-angle annular dark field scanning transmission electron microscopy (HAADF-STEM) and X-ray absorption spectroscopy (XAS) verify that Fe atoms achieve atomic-level dispersion on the obtained SA-Fe-N nanosheets and a possible fourfold coordination with N atoms. The best-performing SA-Fe-N catalyst exhibits excellent ORR activity with half-wave potential (E-1/2) of 0.812 and 0.910 V versus the reversible hydrogen electrode (RHE) in 0.5 (M) H2SO4 and 0.1 m KOH, respectively, along with respectable durability. Such performance surpasses that of most reported non-PGM ORR catalysts. Density functional theory calculations suggest that the relieved passivation effect of OH* on Fe-N-4/C structure leads to its superior ORR activity to Pt/C in alkaline solution. The work demonstrates a novel strategy for developing high-performance non-PGM ORR electrocatalysts with atomically dispersed and stable M-N-x coordination sites in both acidic and alkaline media. |
| 学科主题 | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter |
| 语种 | 英语 |
| WOS记录号 | WOS:000442731100020 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/80007]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Hubei, Peoples R China 2.Natl Taiwan Univ Sci & Technol, Dept Chem Engn, Taipei 10607, Taiwan 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 4.Peking Univ, Dept Mat Sci & Engn, Beijing 100871, Peoples R China 5.Peking Univ, BIC ESAT Coll Engn, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Miao, ZP,Wang, XM,Tsai, MC,et al. Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy[J]. ADVANCED ENERGY MATERIALS,2018,8(24):-. |
| APA | Miao, ZP.,Wang, XM.,Tsai, MC.,Jin, QQ.,Liang, JS.,...&Li, Q.(2018).Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy.ADVANCED ENERGY MATERIALS,8(24),-. |
| MLA | Miao, ZP,et al."Atomically Dispersed Fe-N-x/C Electrocatalyst Boosts Oxygen Catalysis via a New Metal-Organic Polymer Supramolecule Strategy".ADVANCED ENERGY MATERIALS 8.24(2018):-. |
入库方式： OAI收割
来源：金属研究所
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