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| Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution | |
| Liu, DB; Ding, SQ; Wu, CQ; Gan, W; Wang, CD; Cao, DF; Rehman, ZU; Sang, Y; Chen, SM; Zheng, XS; Wang, Y; Ge, BH; Song, L | |
| 2018 | |
| Source Publication | JOURNAL OF MATERIALS CHEMISTRY A
 |
| ISSN | 2050-7488 |
| Volume | 6Issue:16Pages:6840-6846 |
| Subtype | 期刊论文 |
| Abstract | The oxygen evolution reaction (OER) involving multi-step electron transfer is a challenging approach for water-splitting due to its sluggish kinetics. It is desirable to explore more efficient electro-catalysts with earth-abundant elements. Herein, we employed a high-temperature polymerization method to develop a structure consisting of graphitic carbon nitride (g-C3N4) nanopatch enveloped carbon nanotubes (CNTs), where isolated Ni and Fe atoms were embedded into the tri-s-triazine units of g-C3N4 by forming a metal-N-x structure. The designed dual-metal catalyst exhibited remarkable OER performance with an extremely low overpotential (similar to 326 mV at 10 mA cm(-2)) and a small Tafel slope (67 mV per decade), which is superior to those of state-of-the-art electrocatalysts with metal-Nx coordination and the benchmark IrO2/C catalyst. In combination with atomic microscopy observations, our synchrotron-based X-ray absorption spectroscopy results revealed that, as compared to single-metal (Fe or Ni) doped hybrids, the electronic structures of both Ni and Fe atoms were reconfigured in the obtained dual-metal samples. Notably, increase of the oxidative state in Ni sites after multi-metal doping directly contributed to more active sites and favored the OER process, assisted by the porous structure and good electrical contacts between CNTs and g-C3N4. This investigation clearly demonstrated a unique synergistic effect in atomically dual-metal doped catalysts, thus it may provide a versatile route to regulate the electronic structures of single atomic catalysts through engineering of neighboring elements and coordination number. |
| Keyword | Water Oxidation Nitride Nanosheets Reaction Oer Carbon Electrocatalysts Nanoparticles Reduction Graphene Cobalt Spectroscopy |
| DOI | 10.1039/c8ta00550h |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000431003600012 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/29159 |
| Collection | 中科院上海应用物理研究所2011-2018年 |
| Affiliation | 1.Liu, DB 2.Ding, SQ 3.Wu, CQ 4.Gan, W 5.Wang, CD 6.Cao, DF 7.Rehman, ZU 8.Sang, Y 9.Chen, SM 10.Zheng, XS 11.Wang, Y 12.Ge, BH 13.Song, L |
| Recommended Citation GB/T 7714 | Liu, DB,Ding, SQ,Wu, CQ,et al. Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(16):6840-6846. |
| APA | Liu, DB.,Ding, SQ.,Wu, CQ.,Gan, W.,Wang, CD.,...&Song, L.(2018).Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution.JOURNAL OF MATERIALS CHEMISTRY A,6(16),6840-6846. |
| MLA | Liu, DB,et al."Synergistic effect of an atomically dual-metal doped catalyst for highly efficient oxygen evolution".JOURNAL OF MATERIALS CHEMISTRY A 6.16(2018):6840-6846. |
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| Synergistic effect o（955KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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