eprintid: 10073811
rev_number: 31
eprint_status: archive
userid: 608
dir: disk0/10/07/38/11
datestamp: 2019-05-15 11:14:44
lastmod: 2021-10-11 22:38:41
status_changed: 2019-05-15 11:14:44
type: article
metadata_visibility: show
creators_name: Alqahtani, M
creators_name: Sathasivam, S
creators_name: Alhassan, A
creators_name: Cui, F
creators_name: Benjaber, S
creators_name: Blackman, C
creators_name: Zhang, B
creators_name: Qin, Y
creators_name: Parkin, IP
creators_name: Nakamura, S
creators_name: Liu, H
creators_name: Wu, J
title: InGaN/GaN Multiple Quantum Well Photoanode Modified with Cobalt Oxide for Water Oxidation
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F46
divisions: C06
divisions: F56
keywords: indium gallium nitrides; quantum wells; photoelectrochemical water splitting; photoanodes; cobalt oxides
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: Indium gallium nitride (InGaN) is an attractive semiconductor, with a tunable direct bandgap for photoelectrochemical water splitting, but it corrodes in aqueous electrolytes. Cobalt oxide (CoOx) is a promising cocatalyst to protect photoelectrodes and accelerate the charge transfer. CoOx is earth-abundant and stable in extremely alkaline conditions and shows high activity for the oxygen evolution reaction (OER). In this work, we demonstrate that CoOx directly deposited onto InGaN/GaN multiple quantum well photoanodes exhibits excellent activity and stability in a strong alkaline electrolyte, 1 M NaOH (pH = 13.7), for water oxidation up to 28 h, while a reference sample without the catalyst degraded rapidly in the alkaline electrolyte. Under simulated solar illumination, the CoOx-modified InGaN/GaN quantum well photoanode showed a high photocurrent density of 1.26 mA cm–2 at 1.23 V and an onset potential of −0.03 V versus a reversible hydrogen electrode.
date: 2018-11-26
date_type: published
official_url: https://doi.org/10.1021/acsaem.8b01387
oa_status: green
full_text_type: other
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 1654364
doi: 10.1021/acsaem.8b01387
lyricists_name: Alqahtani, Mahdi
lyricists_name: Blackman, Christopher
lyricists_name: Liu, Huiyun
lyricists_name: Parkin, Ivan
lyricists_name: Sathasivam, Sanjayan
lyricists_name: Wu, Jiang
lyricists_id: MALQA14
lyricists_id: CBLAC43
lyricists_id: HLIUX22
lyricists_id: IPPAR53
lyricists_id: SSATH67
lyricists_id: JWUXX91
actors_name: Austen, Jennifer
actors_id: JAUST66
actors_role: owner
full_text_status: public
publication: ACS Applied Energy Materials
volume: 1
number: 11
pagerange: 6417-6424
issn: 2574-0962
citation:        Alqahtani, M;    Sathasivam, S;    Alhassan, A;    Cui, F;    Benjaber, S;    Blackman, C;    Zhang, B;                     ... Wu, J; + view all <#>        Alqahtani, M;  Sathasivam, S;  Alhassan, A;  Cui, F;  Benjaber, S;  Blackman, C;  Zhang, B;  Qin, Y;  Parkin, IP;  Nakamura, S;  Liu, H;  Wu, J;   - view fewer <#>    (2018)    InGaN/GaN Multiple Quantum Well Photoanode Modified with Cobalt Oxide for Water Oxidation.                   ACS Applied Energy Materials , 1  (11)   pp. 6417-6424.    10.1021/acsaem.8b01387 <https://doi.org/10.1021/acsaem.8b01387>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10073811/3/Blackman%20Manuscript%20Applied%20energy.pdf