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Title: Cobalt Oxide-Coated Single Crystalline Bismuth Vanadate Photoanodes for Efficient Photoelectrochemical Chlorine Generation

Abstract

Bismuth vanadate (BiVO4) is an outstanding photoanode material for photoelectrochemical water splitting. Here in this work, a series of single crystalline BiVO4 photoanodes are synthesized by pulsed laser deposition (PLD). Once coated with a thin layer of cobalt oxide (CoOx) cocatalyst, also by PLD, the photoanodes support efficient photoelectrochemical generation of chlorine (Cl2) from brine under simulated solar light. The activity of the chlorine generation reaction (ClER) is optimized when the thickness of CoOx is about 3 nm, with the faradic efficiency of ClER exceeding 60%. Detailed studies show that the CoOx cocatalyst layer is amorphous, uniform in thickness, and chemically robust. As such, the cocatalyst also effectively protects the underlying BiVO4 photoanodes against chlorine corrosion. This work provides insights into using artificial photosynthesis for byproducts that carry significant economic value while avoiding the energetically expensive oxygen evolution reactions.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [2]; ORCiD logo [3];  [2]; ORCiD logo [2]
  1. Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN); Stony Brook University, NY (United States)
  2. Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
  3. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
2222385
Report Number(s):
BNL-225029-2023-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: 15; Journal Issue: 42; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; artificial photosynthesis; photoelectrochemical water splitting; chlorine generation; bismuth vanadate; cobalt oxides

Citation Formats

Xi, Zhaoyi, Zhou, Chenyu, Kisslinger, Kim, Nanayakkara, Tharanga, Lu, Fang, Tong, Xiao, and Liu, Mingzhao. Cobalt Oxide-Coated Single Crystalline Bismuth Vanadate Photoanodes for Efficient Photoelectrochemical Chlorine Generation. United States: N. p., 2023. Web. doi:10.1021/acsami.3c11592.
Xi, Zhaoyi, Zhou, Chenyu, Kisslinger, Kim, Nanayakkara, Tharanga, Lu, Fang, Tong, Xiao, & Liu, Mingzhao. Cobalt Oxide-Coated Single Crystalline Bismuth Vanadate Photoanodes for Efficient Photoelectrochemical Chlorine Generation. United States. https://doi.org/10.1021/acsami.3c11592
Xi, Zhaoyi, Zhou, Chenyu, Kisslinger, Kim, Nanayakkara, Tharanga, Lu, Fang, Tong, Xiao, and Liu, Mingzhao. Wed . "Cobalt Oxide-Coated Single Crystalline Bismuth Vanadate Photoanodes for Efficient Photoelectrochemical Chlorine Generation". United States. https://doi.org/10.1021/acsami.3c11592.
@article{osti_2222385,
title = {Cobalt Oxide-Coated Single Crystalline Bismuth Vanadate Photoanodes for Efficient Photoelectrochemical Chlorine Generation},
author = {Xi, Zhaoyi and Zhou, Chenyu and Kisslinger, Kim and Nanayakkara, Tharanga and Lu, Fang and Tong, Xiao and Liu, Mingzhao},
abstractNote = {Bismuth vanadate (BiVO4) is an outstanding photoanode material for photoelectrochemical water splitting. Here in this work, a series of single crystalline BiVO4 photoanodes are synthesized by pulsed laser deposition (PLD). Once coated with a thin layer of cobalt oxide (CoOx) cocatalyst, also by PLD, the photoanodes support efficient photoelectrochemical generation of chlorine (Cl2) from brine under simulated solar light. The activity of the chlorine generation reaction (ClER) is optimized when the thickness of CoOx is about 3 nm, with the faradic efficiency of ClER exceeding 60%. Detailed studies show that the CoOx cocatalyst layer is amorphous, uniform in thickness, and chemically robust. As such, the cocatalyst also effectively protects the underlying BiVO4 photoanodes against chlorine corrosion. This work provides insights into using artificial photosynthesis for byproducts that carry significant economic value while avoiding the energetically expensive oxygen evolution reactions.},
doi = {10.1021/acsami.3c11592},
journal = {ACS Applied Materials and Interfaces},
number = 42,
volume = 15,
place = {United States},
year = {Wed Oct 04 00:00:00 EDT 2023},
month = {Wed Oct 04 00:00:00 EDT 2023}
}

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