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Title: Activating Layered Double Hydroxide with Multivacancies by Memory Effect for Energy-Efficient Hydrogen Production at Neutral pH

Abstract

Sustainable water-splitting hydrogen production has long been considered one of the most promising energy conversion technologies, but enormous challenges remain: for instance, water electrolysis suffers from high overpotential and over energy consumption under neutral pH conditions. Furthermore, taking advantage of the memory effect of layered double hydroxide (LDH), we report an energy-efficient neutral water electrolyzer material based on LDH with multiple vacancy defects. Benefiting from the improved electrical conductivity, larger electrochemical surface area (ECSA), and faster charge transfer, the NiFe LDH with O, Ni, and Fe vacancies exhibits a low overpotential of 87 mV at 10 mA/cm2 for hydrogen evolution reaction (HER) in a pH 7 buffer electrolyte. Impressively, the as-fabricated vacancy-containing NiFe LDH (v-NiFe LDH) splits water with a current density of 10 mA/cm2 at ~1.60 V in a two-electrode device, outperforming most other water-splitting catalysts in neutral media. Such an electrolyzer setup could be powered by a commercial 2.0 V solar cell, producing hydrogen at a current density as high as 100 mA/cm2.

Authors:
 [1]; ORCiD logo [2];  [1];  [1];  [3];  [4];  [5]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [6];  [7]; ORCiD logo [1]
  1. Beijing Univ. of Chemical Technology, Beijing (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Chinese Academy of Sciences (CAS), Beijing (China)
  4. Central South Univ., Changsha (China)
  5. National Center for Nanoscience & Technology, Beijing (China)
  6. Beijing Univ. of Chemical Technology, Beijing (China); Huazhong Univ. of Science and Technology, Wuhan (China)
  7. Huazhong Univ. of Science and Technology, Wuhan (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1542785
Report Number(s):
BNL-211863-2019-JAAM
Journal ID: ISSN 2380-8195
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 4; Journal Issue: 6; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Yuan, Zijian, Bak, Seong -Min, Li, Pengsong, Jia, Yin, Zheng, Lirong, Zhou, Yu, Bai, Lu, Hu, Enyuan, Yang, Xiao -Qing, Cai, Zhao, Sun, Yongming, and Sun, Xiaoming. Activating Layered Double Hydroxide with Multivacancies by Memory Effect for Energy-Efficient Hydrogen Production at Neutral pH. United States: N. p., 2019. Web. doi:10.1021/acsenergylett.9b00867.
Yuan, Zijian, Bak, Seong -Min, Li, Pengsong, Jia, Yin, Zheng, Lirong, Zhou, Yu, Bai, Lu, Hu, Enyuan, Yang, Xiao -Qing, Cai, Zhao, Sun, Yongming, & Sun, Xiaoming. Activating Layered Double Hydroxide with Multivacancies by Memory Effect for Energy-Efficient Hydrogen Production at Neutral pH. United States. https://doi.org/10.1021/acsenergylett.9b00867
Yuan, Zijian, Bak, Seong -Min, Li, Pengsong, Jia, Yin, Zheng, Lirong, Zhou, Yu, Bai, Lu, Hu, Enyuan, Yang, Xiao -Qing, Cai, Zhao, Sun, Yongming, and Sun, Xiaoming. Wed . "Activating Layered Double Hydroxide with Multivacancies by Memory Effect for Energy-Efficient Hydrogen Production at Neutral pH". United States. https://doi.org/10.1021/acsenergylett.9b00867. https://www.osti.gov/servlets/purl/1542785.
@article{osti_1542785,
title = {Activating Layered Double Hydroxide with Multivacancies by Memory Effect for Energy-Efficient Hydrogen Production at Neutral pH},
author = {Yuan, Zijian and Bak, Seong -Min and Li, Pengsong and Jia, Yin and Zheng, Lirong and Zhou, Yu and Bai, Lu and Hu, Enyuan and Yang, Xiao -Qing and Cai, Zhao and Sun, Yongming and Sun, Xiaoming},
abstractNote = {Sustainable water-splitting hydrogen production has long been considered one of the most promising energy conversion technologies, but enormous challenges remain: for instance, water electrolysis suffers from high overpotential and over energy consumption under neutral pH conditions. Furthermore, taking advantage of the memory effect of layered double hydroxide (LDH), we report an energy-efficient neutral water electrolyzer material based on LDH with multiple vacancy defects. Benefiting from the improved electrical conductivity, larger electrochemical surface area (ECSA), and faster charge transfer, the NiFe LDH with O, Ni, and Fe vacancies exhibits a low overpotential of 87 mV at 10 mA/cm2 for hydrogen evolution reaction (HER) in a pH 7 buffer electrolyte. Impressively, the as-fabricated vacancy-containing NiFe LDH (v-NiFe LDH) splits water with a current density of 10 mA/cm2 at ~1.60 V in a two-electrode device, outperforming most other water-splitting catalysts in neutral media. Such an electrolyzer setup could be powered by a commercial 2.0 V solar cell, producing hydrogen at a current density as high as 100 mA/cm2.},
doi = {10.1021/acsenergylett.9b00867},
journal = {ACS Energy Letters},
number = 6,
volume = 4,
place = {United States},
year = {Wed May 22 00:00:00 EDT 2019},
month = {Wed May 22 00:00:00 EDT 2019}
}

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