Abstract
Amorphous molybdenum sulfide (a-MoSx) is a promising hydrogen evolution catalyst owing to its low cost and high activity. A simple electrodeposition method (cyclic voltammetry) allows uniform formation of a-MoSx films on conductive surfaces. However, the morphology of a-MoSx deposited on a TiO2/Sb2Se3 photocathode could be modulated by varying the starting potential. The cathodically initiated a-MoSx showed conformal filmlike morphology, whereas anodic initiation induced inhomogeneous particulate deposition. The filmlike morphology of a-MoSx was subjected to catalyst activation, which improved the photocurrent density and reduced the charge-transfer resistance at the semiconductor/electrolyte interface, as compared to that of its particulate counterpart. X-ray photoelectron spectroscopy confirmed that different chemical states of a-MoSx (photoelectrochemically active sites) were developed on the basis of the electrodeposited a-MoSx morphology. The research provides an effective approach for uniformly depositing cost-effective a-MoSx on nanostructured photoelectrodes, for photoelectrochemical water splitting.
| Original language | English |
|---|---|
| Pages (from-to) | 10898-10908 |
| Number of pages | 11 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 10 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - 2018 Apr 4 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
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Controlled Electrodeposition of Photoelectrochemically Active Amorphous MoS x Cocatalyst on Sb2Se3 Photocathode. / Tan, Jeiwan; Yang, Wooseok; Oh, Yunjung; Lee, Hyungsoo; Park, Jaemin; Moon, Joo Ho.
In: ACS Applied Materials and Interfaces, Vol. 10, No. 13, 04.04.2018, p. 10898-10908.Research output: Contribution to journal › Article
TY - JOUR
T1 - Controlled Electrodeposition of Photoelectrochemically Active Amorphous MoS x Cocatalyst on Sb2Se3 Photocathode
AU - Tan, Jeiwan
AU - Yang, Wooseok
AU - Oh, Yunjung
AU - Lee, Hyungsoo
AU - Park, Jaemin
AU - Moon, Joo Ho
PY - 2018/4/4
Y1 - 2018/4/4
N2 - Amorphous molybdenum sulfide (a-MoSx) is a promising hydrogen evolution catalyst owing to its low cost and high activity. A simple electrodeposition method (cyclic voltammetry) allows uniform formation of a-MoSx films on conductive surfaces. However, the morphology of a-MoSx deposited on a TiO2/Sb2Se3 photocathode could be modulated by varying the starting potential. The cathodically initiated a-MoSx showed conformal filmlike morphology, whereas anodic initiation induced inhomogeneous particulate deposition. The filmlike morphology of a-MoSx was subjected to catalyst activation, which improved the photocurrent density and reduced the charge-transfer resistance at the semiconductor/electrolyte interface, as compared to that of its particulate counterpart. X-ray photoelectron spectroscopy confirmed that different chemical states of a-MoSx (photoelectrochemically active sites) were developed on the basis of the electrodeposited a-MoSx morphology. The research provides an effective approach for uniformly depositing cost-effective a-MoSx on nanostructured photoelectrodes, for photoelectrochemical water splitting.
AB - Amorphous molybdenum sulfide (a-MoSx) is a promising hydrogen evolution catalyst owing to its low cost and high activity. A simple electrodeposition method (cyclic voltammetry) allows uniform formation of a-MoSx films on conductive surfaces. However, the morphology of a-MoSx deposited on a TiO2/Sb2Se3 photocathode could be modulated by varying the starting potential. The cathodically initiated a-MoSx showed conformal filmlike morphology, whereas anodic initiation induced inhomogeneous particulate deposition. The filmlike morphology of a-MoSx was subjected to catalyst activation, which improved the photocurrent density and reduced the charge-transfer resistance at the semiconductor/electrolyte interface, as compared to that of its particulate counterpart. X-ray photoelectron spectroscopy confirmed that different chemical states of a-MoSx (photoelectrochemically active sites) were developed on the basis of the electrodeposited a-MoSx morphology. The research provides an effective approach for uniformly depositing cost-effective a-MoSx on nanostructured photoelectrodes, for photoelectrochemical water splitting.
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U2 - 10.1021/acsami.8b00305
DO - 10.1021/acsami.8b00305
M3 - Article
AN - SCOPUS:85044961980
VL - 10
SP - 10898
EP - 10908
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 13
ER -