TY - JOUR
T1 - One-Step Hydrothermal Deposition of Ni:FeOOH onto Photoanodes for Enhanced Water Oxidation
AU - Cai, Lili
AU - Zhao, Jiheng
AU - Li, Hong
AU - Park, Joonsuk
AU - Cho, In Sun
AU - Han, Hyun Soo
AU - Zheng, Xiaolin
N1 - Funding Information:
This work was supported by the Bay Area Photovoltaics Consortium (BAPVC) and The Global Climate and Energy Project (GCEP) at Stanford University. The authors acknowledge support from the Stanford Nano Shared Facility for material characterizations. The authors thank Dr. Guangxu Chen for assistance with the gas chromatograph measurements.
Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/9/9
Y1 - 2016/9/9
N2 - The realization of efficient photoelectrochemical (PEC) water splitting requires effective integration of earth-abundant active oxygen evolution catalysts (OECs) with diverse photoanodes. Although many good OECs have been investigated on conductive substrates under dark conditions, further studies are needed to evaluate their performance when integrated with photoanodes under illumination. Such studies will be facilitated by developing effective coating methods of OECs onto diverse photoanodes. Here, we report a one-step hydrothermal process that conformally coats various photoanodes with ultrathin Ni-doped FeOOH (Ni:FeOOH) OECs. The coated Ni:FeOOH, due to its unique open tunnel structure, tunable Ni doping concentration, and high coating/interface quality, lowers the onset potential of all of the photoanodes investigated, including WO3/BiVO4, WO3, α-Fe2O3, TiO2 nanowires, BiVO4 films, and Si wafers. We believe that this simple and yet effective hydrothermal method is a useful addition to the existing deposition techniques for coupling OECs with photoanodes and will greatly facilitate the scale-up of efficient PEC devices.
AB - The realization of efficient photoelectrochemical (PEC) water splitting requires effective integration of earth-abundant active oxygen evolution catalysts (OECs) with diverse photoanodes. Although many good OECs have been investigated on conductive substrates under dark conditions, further studies are needed to evaluate their performance when integrated with photoanodes under illumination. Such studies will be facilitated by developing effective coating methods of OECs onto diverse photoanodes. Here, we report a one-step hydrothermal process that conformally coats various photoanodes with ultrathin Ni-doped FeOOH (Ni:FeOOH) OECs. The coated Ni:FeOOH, due to its unique open tunnel structure, tunable Ni doping concentration, and high coating/interface quality, lowers the onset potential of all of the photoanodes investigated, including WO3/BiVO4, WO3, α-Fe2O3, TiO2 nanowires, BiVO4 films, and Si wafers. We believe that this simple and yet effective hydrothermal method is a useful addition to the existing deposition techniques for coupling OECs with photoanodes and will greatly facilitate the scale-up of efficient PEC devices.
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U2 - 10.1021/acsenergylett.6b00303
DO - 10.1021/acsenergylett.6b00303
M3 - Article
AN - SCOPUS:85015988906
SN - 2380-8195
VL - 1
SP - 624
EP - 632
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 3
ER -