Please use this identifier to cite or link to this item: 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
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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