TY - JOUR
T1 - Overall Water Splitting by a SrTaO2N-Based Photocatalyst Decorated with an Ir-Promoted Ru-Based Cocatalyst
AU - Chen, Kaihong
AU - Xiao, Jiadong
AU - Vequizo, Junie Jhon M.
AU - Hisatomi, Takashi
AU - Ma, Yiwen
AU - Nakabayashi, Mamiko
AU - Takata, Tsuyoshi
AU - Yamakata, Akira
AU - Shibata, Naoya
AU - Domen, Kazunari
N1 - Funding Information:
This work was financially supported by the Artificial Photosynthesis Project of the New Energy and Industrial Technology Development Organization (NEDO) and JST-PRESTO (grant no. JPMJPR20T9). Part of this work was conducted at the Advanced Characterization Nanotechnology Platform of the University of Tokyo, supported by the “Nanotechnology Platform” of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (grant no. JPMXP09-A-22-UT-0023). K.C. acknowledges support from the Japanese Society for Promotion of Sciences (JSPS) for Overseas Researchers and the National Natural Science Foundation of China (grant no. 22005154). The authors also thank Ms. Michiko Obata (Shinshu University) and Ms. Keiko Kato (University of Tokyo) for their assistance in performing XPS and elemental analyses, respectively.
Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.
PY - 2022
Y1 - 2022
N2 - The development of narrow-bandgap photocatalysts for one-step-excitation overall water splitting (OWS) remains a critical challenge in the field of solar hydrogen production. SrTaO2N is a photocatalytic material having a band structure suitable for OWS under visible light (λ ≤ 600 nm). However, the presence of defects in the oxynitride and the lack of cocatalysts to promote simultaneous hydrogen and oxygen evolution make it challenging to realize OWS using this material. The present work demonstrates a SrTaO2N-based particulate photocatalyst for OWS. This photocatalyst, which was composed of single crystals, was obtained by nitriding SrCl2 and Ta2O5 together with NaOH, with the latter added to control the formation of defects. The subsequent loading of bimetallic RuIrOx nanoparticles accelerated charge separation and allowed the SrTaO2N photocatalyst to exhibit superior OWS activity. This research presenting the strategies of controlling the oxygen sources and promoting the cocatalyst function is expected to expand the range of potential OWS-active oxynitride photocatalysts and permit the design of efficient cocatalysts for photocatalytic OWS.
AB - The development of narrow-bandgap photocatalysts for one-step-excitation overall water splitting (OWS) remains a critical challenge in the field of solar hydrogen production. SrTaO2N is a photocatalytic material having a band structure suitable for OWS under visible light (λ ≤ 600 nm). However, the presence of defects in the oxynitride and the lack of cocatalysts to promote simultaneous hydrogen and oxygen evolution make it challenging to realize OWS using this material. The present work demonstrates a SrTaO2N-based particulate photocatalyst for OWS. This photocatalyst, which was composed of single crystals, was obtained by nitriding SrCl2 and Ta2O5 together with NaOH, with the latter added to control the formation of defects. The subsequent loading of bimetallic RuIrOx nanoparticles accelerated charge separation and allowed the SrTaO2N photocatalyst to exhibit superior OWS activity. This research presenting the strategies of controlling the oxygen sources and promoting the cocatalyst function is expected to expand the range of potential OWS-active oxynitride photocatalysts and permit the design of efficient cocatalysts for photocatalytic OWS.
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U2 - 10.1021/jacs.2c11025
DO - 10.1021/jacs.2c11025
M3 - Article
C2 - 36669205
AN - SCOPUS:85146913313
SN - 0002-7863
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
ER -
