Insight into the role of Ni-Fe dual sites in the oxygen evolution reaction based on atomically metal-doped polymeric carbon nitride
文献类型：期刊论文
| 作者 | Wu, CC; Zhang, XM; Xia, ZX; Shu, M; Li, HQ; Xu, XL; Si, R; Rykov, AI; Wang, JH; Yu, SS |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
 |
| 出版日期 | 2019 |
| 卷号 | 7期号:23页码:14001-14010 |
| ISSN号 | 2050-7488 |
| 关键词 | WATER OXIDATION C CATALYST IRON ELECTROCATALYSTS REDUCTION HYDROGEN DENSITY EFFICIENT NANORODS G-C3N4 |
| DOI | 10.1039/c9ta03163d |
| 文献子类 | 期刊论文 |
| 英文摘要 | The oxygen evolution reaction (OER) plays a critical role in efficient conversion and storage of renewable energy sources, whereas the active sites for the most representative electrocatalysts, Ni-Fe compounds, remain under debate. In this work, we have developed polymeric carbon nitride (PCN) with atomically dispersed N-coordinated Ni-Fe sites to investigate the OER process. The Ni-Fe dual sites consist of adjacent Ni and Fe atoms coordinated with N atoms in the PCN matrix. NiFe-codoped PCN exhibits higher electrocatalytic activity than monometal-doped catalysts, showing a lower overpotential (310 mV at 10 mA cm(-2)) and smaller Tafel slope (38 mV dec(-1)) in 1 M KOH, indicating that Ni-Fe dual-metal sites significantly favor the OER process. According to density functional theory calculations based on the oxidized-NiFe@PCN model, it was found that adjacent Ni and Fe atoms co-participate in the OER process for NiFe-codoped PCN, leading to a much lower energy barrier (0.10 or 0.22 eV for U = 1.58 V), while the effect of electronic modification of the single metal active sites by the other component (Ni sites by Fe sites or vice versa) contributes less to activity enhancement, thus leading to a rational explanation on the synergistic effect of the NiFe-based OER catalysts. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/32101]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Dalian Inst Chem Phys, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China; 4.Jilin Univ, Dept Mat Sci, Changchun 130012, Jilin, Peoples R China 5.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Wu, CC,Zhang, XM,Xia, ZX,et al. Insight into the role of Ni-Fe dual sites in the oxygen evolution reaction based on atomically metal-doped polymeric carbon nitride[J]. JOURNAL OF MATERIALS CHEMISTRY A,2019,7(23):14001-14010. |
| APA | Wu, CC.,Zhang, XM.,Xia, ZX.,Shu, M.,Li, HQ.,...&Sun, GQ.(2019).Insight into the role of Ni-Fe dual sites in the oxygen evolution reaction based on atomically metal-doped polymeric carbon nitride.JOURNAL OF MATERIALS CHEMISTRY A,7(23),14001-14010. |
| MLA | Wu, CC,et al."Insight into the role of Ni-Fe dual sites in the oxygen evolution reaction based on atomically metal-doped polymeric carbon nitride".JOURNAL OF MATERIALS CHEMISTRY A 7.23(2019):14001-14010. |
入库方式： OAI收割
来源：上海应用物理研究所
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