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Title: Quinary Defect-Rich Ultrathin Bimetal Hydroxide Nanosheets for Water Oxidation

Abstract

The electronic structure of layered double hydroxides (LDHs) can be modulated by heteroatom doping and creating vacancies. The number of exposed active sites can be enriched by exfoliating the bulk structure into fewer layers. Herein, we successfully achieved multielement doping and exfoliation for Co 3Fe LDHs by one SF 6-plasma etching step at room temperature (named as Co 3Fe LDHs-SF 6). The obtained Co 3Fe LDHs-SF 6 ultrathin nanosheets display outstanding oxygen evolution reaction (OER) activity, which only needs 268 mV overpotential to reach 10 mA cm –2. Tafel slope and charge transfer resistance are dramatically decreased indicating a faster reaction kinetic rate. Lastly, the excellent OER activity can be attributed to an increased number of active sites and an optimized electronic structure modulated by the incorporation of electron-withdrawing F, electron-donating S, and abundant vacancies resulting in proper adsorption energy to oxygen species.

Authors:
 [1];  [2]; ORCiD logo [3];  [4];  [4];  [4];  [4]; ORCiD logo [4]; ORCiD logo [2]; ORCiD logo [3]
  1. Hunan Univ., Changsha (China); Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Tamkang Univ., Tamsui (Taiwan)
  3. Hunan Univ., Changsha (China)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1593241
Report Number(s):
BNL-213562-2020-JAAM
Journal ID: ISSN 1944-8244
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 11; Journal Issue: 47; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; quinary bimetal hydroxide nanosheets; exfoliation; in situ S; F co-filling; vacancies; electrochemical water oxidation

Citation Formats

Liu, Zhijuan, Huang, Yu-cheng, Wang, Yanyong, Cen, Jiajie, Yang, Haotian, Chen, Xiaobo, Tong, Xiao, Su, Dong, Dong, Chung-Li, and Wang, Shuangyin. Quinary Defect-Rich Ultrathin Bimetal Hydroxide Nanosheets for Water Oxidation. United States: N. p., 2019. Web. doi:10.1021/acsami.9b10315.
Liu, Zhijuan, Huang, Yu-cheng, Wang, Yanyong, Cen, Jiajie, Yang, Haotian, Chen, Xiaobo, Tong, Xiao, Su, Dong, Dong, Chung-Li, & Wang, Shuangyin. Quinary Defect-Rich Ultrathin Bimetal Hydroxide Nanosheets for Water Oxidation. United States. doi:10.1021/acsami.9b10315.
Liu, Zhijuan, Huang, Yu-cheng, Wang, Yanyong, Cen, Jiajie, Yang, Haotian, Chen, Xiaobo, Tong, Xiao, Su, Dong, Dong, Chung-Li, and Wang, Shuangyin. Wed . "Quinary Defect-Rich Ultrathin Bimetal Hydroxide Nanosheets for Water Oxidation". United States. doi:10.1021/acsami.9b10315.
@article{osti_1593241,
title = {Quinary Defect-Rich Ultrathin Bimetal Hydroxide Nanosheets for Water Oxidation},
author = {Liu, Zhijuan and Huang, Yu-cheng and Wang, Yanyong and Cen, Jiajie and Yang, Haotian and Chen, Xiaobo and Tong, Xiao and Su, Dong and Dong, Chung-Li and Wang, Shuangyin},
abstractNote = {The electronic structure of layered double hydroxides (LDHs) can be modulated by heteroatom doping and creating vacancies. The number of exposed active sites can be enriched by exfoliating the bulk structure into fewer layers. Herein, we successfully achieved multielement doping and exfoliation for Co3Fe LDHs by one SF6-plasma etching step at room temperature (named as Co3Fe LDHs-SF6). The obtained Co3Fe LDHs-SF6 ultrathin nanosheets display outstanding oxygen evolution reaction (OER) activity, which only needs 268 mV overpotential to reach 10 mA cm–2. Tafel slope and charge transfer resistance are dramatically decreased indicating a faster reaction kinetic rate. Lastly, the excellent OER activity can be attributed to an increased number of active sites and an optimized electronic structure modulated by the incorporation of electron-withdrawing F, electron-donating S, and abundant vacancies resulting in proper adsorption energy to oxygen species.},
doi = {10.1021/acsami.9b10315},
journal = {ACS Applied Materials and Interfaces},
number = 47,
volume = 11,
place = {United States},
year = {2019},
month = {11}
}

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This content will become publicly available on November 6, 2020
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