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    Hydrothermal Synthesis of CaMn2O4·xH2O Nanorods as Co-Catalysts on GaN Nanowire Photoanode

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    Solvothermal analysis.pdf
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    Type
    Article
    Authors
    Bae, Hyojung
    Kim, Hyunggu
    Burungale, Vishal
    Min, Jung-Wook
    Cha, An-na
    Rho, Hokyun
    Ryu, Sang-Wan
    Kang, Soon Hyung
    Ha, Jun-Seok
    KAUST Department
    Photonics Laboratory King Abdullah University of Science and Technology Thuwal 23955-6900 Saudi Arabia
    Date
    2021-05-14
    Embargo End Date
    2022-05-14
    Submitted Date
    2021-03-11
    Permanent link to this record
    http://hdl.handle.net/10754/669459
    
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    Abstract
    Co-catalysts play a crucial role in photoelectrochemical (PEC) water splitting reactions by improving slow kinetics and reducing surface recombination, thereby enhancing PEC performance. However, achieving a well-defined interface between low-dimensional semiconductors and co-catalysts is challenging due to difficulties in depositing a uniform co-catalyst layer and attaining mixed and disordered states. CaMn2O4·xH2O has been extensively studied for the purpose of decreasing the overpotential in the oxygen evolution reaction. In this study, CaMn2O4·xH2O was synthesized via a hydrothermal method, and loaded onto a GaN nanowire (NW) photoanode. Optimized CaMn2O4·xH2O layers were decorated on GaN NWs to create CaMn2O4@GaN, which delivered a maximum photocurrent of 0.4 mA/cm2 at 0 V vs. the Ag/AgCl reference electrode under an AM 1.5 G solar simulator, 1.6-fold higher than that (0.25 mA/cm2) of bare GaN NWs. Thus, highly efficient and stable PEC water splitting was achieved on the GaN NW photoanode.
    Citation
    Bae, H., Kim, H., Burungale, V., Min, J., Cha, A., Rho, H., … Ha, J. (2021). Hydrothermal Synthesis of CaMn 2 O 4 · xH 2 O Nanorods as Co-Catalysts on GaN Nanowire Photoanode. Bulletin of the Korean Chemical Society. doi:10.1002/bkcs.12297
    Sponsors
    This research was financially supported by the Ministry of Trade, Industry and Energy (MOTIE) and the Korean Institute for Advancement of Technology (KIAT) through the International Cooperative R&D program (No. P0006851) and Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2018R1A6A1A03024334) and Basic Science Research Capacity Enhancement Project through Korea Basic Science Institute (Energy Convergence Core Facility) grant funded by the Ministry of Education (2019R1A6C1030006).
    Publisher
    Wiley
    Journal
    Bulletin of the Korean Chemical Society
    DOI
    10.1002/bkcs.12297
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1002/bkcs.12297
    ae974a485f413a2113503eed53cd6c53
    10.1002/bkcs.12297
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