TY - JOUR
T1 - Earth-Abundant Molecular Z-Scheme Photoelectrochemical Cell for Overall Water-Splitting
AU - Windle, Christopher D.
AU - Kumagai, Hiromu
AU - Higashi, Masanobu
AU - Brisse, Romain
AU - Bold, Sebastian
AU - Jousselme, Bruno
AU - Chavarot-Kerlidou, Murielle
AU - Maeda, Kazuhiko
AU - Abe, Ryu
AU - Ishitani, Osamu
AU - Artero, Vincent
N1 - Funding Information:
This work was supported by Strategic International Collaborative Research Program (PhotoCAT project) from Japan Science and Technology Agency (JST), the French National Research Agency (ANR-14-JTIC-0004-01), and CREST (Molecular Technology project, JST). This work was also supported by the French National Research Agency within the Labex program ARCANE (ANR-11-LABX-0003-01) and CBH-EUR-GS (ANR-17-EURE-0003) as well as by a Grant-in-Aid for Scientific Research on Innovative Area “Mixed Anion (JP16H06441)”. This work was also supported by the JSPS KAKENHI Grant Number 17H06439 in Scientific Research on Innovative Areas “Innovations for Light-Energy Conversion (I4LEC)”. We acknowledge Ookayama Materials Analysis Division (Tokyo Institute of Technology) for assistance in ICP analyses.
Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/6/19
Y1 - 2019/6/19
N2 - A push-pull organic dye and a cobaloxime catalyst were successfully cografted on NiO and CuGaO2 to form efficient molecular photocathodes for H2 production with >80% Faradaic efficiency. CuGaO2 is emerging as a more effective p-type semiconductor in photoelectrochemical cells and yields a photocathode with 4-fold higher photocurrent densities and 400 mV more positive onset photocurrent potential compared to the one based on NiO. Such an optimized CuGaO2 photocathode was combined with a TaON|CoOx photoanode in a photoelectrochemical cell. Operated in this Z-scheme configuration, the two photoelectrodes produced H2 and O2 from water with 87% and 88% Faradaic efficiency, respectively, at pH 7 under visible light and in the absence of an applied bias, equating to a solar to hydrogen conversion efficiency of 5.4 × 10-3%. This is, to the best of our knowledge, the highest efficiency reported so far for a molecular-based noble metal-free water splitting Z-scheme.
AB - A push-pull organic dye and a cobaloxime catalyst were successfully cografted on NiO and CuGaO2 to form efficient molecular photocathodes for H2 production with >80% Faradaic efficiency. CuGaO2 is emerging as a more effective p-type semiconductor in photoelectrochemical cells and yields a photocathode with 4-fold higher photocurrent densities and 400 mV more positive onset photocurrent potential compared to the one based on NiO. Such an optimized CuGaO2 photocathode was combined with a TaON|CoOx photoanode in a photoelectrochemical cell. Operated in this Z-scheme configuration, the two photoelectrodes produced H2 and O2 from water with 87% and 88% Faradaic efficiency, respectively, at pH 7 under visible light and in the absence of an applied bias, equating to a solar to hydrogen conversion efficiency of 5.4 × 10-3%. This is, to the best of our knowledge, the highest efficiency reported so far for a molecular-based noble metal-free water splitting Z-scheme.
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U2 - 10.1021/jacs.9b02521
DO - 10.1021/jacs.9b02521
M3 - Article
C2 - 31135147
AN - SCOPUS:85067510932
VL - 141
SP - 9593
EP - 9602
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 24
ER -
