Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/144573
Title: Electronic structure engineering to boost oxygen reduction activity by controlling the coordination of the central metal
Authors: Han, Yunhu
Wang, Yanggang
Xu, Ruirui
Chen, Wenxing
Zheng, Lirong
Han, Aijuan
Zhu, Youqi
Zhang, Jian
Zhang, Huabin
Luo, Jun
Chen, Chen
Peng, Qing
Wang, Dingsheng
Li, Yadong
Keywords: Engineering::Chemical engineering
Issue Date: 2018
Source: Han, Y., Wang, Y., Xu, R., Chen, W., Zheng, L., Han, A., ... Li, Y. (2018). Electronic structure engineering to boost oxygen reduction activity by controlling the coordination of the central metal. Energy & Environmental Science, 11(9), 2348--2352. doi:10.1039/C8EE01481G
Journal: Energy & Environmental Science
Abstract: Adjusting the electronic structure of the active center is a highly effective strategy for improving the performance of catalysts. Herein, we report an atomically dispersed catalyst (FeCl1N4/CNS), which realized for the first time a great improvement of the ORR by controlling the electronic structure of the central metal with a coordinated chlorine. The half-wave potential of FeCl1N4/CNS is E1/2 = 0.921 V, which is the highest among the reported values for non-precious metal electrocatalysts and far exceeds that of FeN4/CN and commercial Pt/C in alkaline solution. Besides an exceptionally high kinetic current density (Jk) of 41.11 mA cm−2 at 0.85 V, it also has a good methanol tolerance and outstanding stability. Experiments and DFT demonstrated that the near-range interaction with chlorine and the long-range interaction with sulfur of Fe modulated the electronic structure of the active site, thus resulting in a great improvement of the ORR in alkaline media. The present findings could open new avenues for the design of superior electrocatalysts.
URI: https://hdl.handle.net/10356/144573
ISSN: 1754-5692
DOI: 10.1039/C8EE01481G
Rights: © 2018 The Royal Society of Chemistry. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

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