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https://hdl.handle.net/10356/85601
Title: | In situ formation of molecular Ni-Fe active sites on heteroatom-doped graphene as a heterogeneous electrocatalyst toward oxygen evolution | Authors: | Wang, Jiong Gan, Liyong Zhang, Wenyu Peng, Yuecheng Yu, Hong Yan, Qingyu Xia, Xinghua Wang, Xin |
Keywords: | Oxygen Evolution Reaction (OER) Heteroatom-doped Graphene |
Issue Date: | 2018 | Source: | Wang, J., Gan, L., Zhang, W., Peng, Y., Yu, H., Yan, Q., et al. (2018). In situ formation of molecular Ni-Fe active sites on heteroatom-doped graphene as a heterogeneous electrocatalyst toward oxygen evolution. Science Advances, 4(3), eaap7970-. | Series/Report no.: | Science Advances | Abstract: | Molecularly well-defined Ni sites at heterogeneous interfaces were derived from the incorporation of Ni2+ ions into heteroatom-doped graphene. The molecular Ni sites on graphene were redox-active. However, they showed poor activity toward oxygen evolution reaction (OER) in KOH aqueous solution. We demonstrated for the first time that the presence of Fe3+ ions in the solution could bond at the vicinity of the Ni sites with a distance of 2.7 Å, generating molecularly sized and heterogeneous Ni-Fe sites anchored on doped graphene. These Ni-Fe sites exhibited markedly improved OER activity. The Pourbaix diagram confirmed the formation of the Ni-Fe sites and revealed that the Ni-Fe sites adsorbed HO− ions with a bridge geometry, which facilitated the OER electrocatalysis. | URI: | https://hdl.handle.net/10356/85601 http://hdl.handle.net/10220/45173 |
DOI: | 10.1126/sciadv.aap7970 | Schools: | School of Chemical and Biomedical Engineering School of Materials Science & Engineering |
Rights: | © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | SCBE Journal Articles |
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