TY - JOUR
T1 - Phosphorous-doped molybdenum disulfide anchored on silicon as an efficient catalyst for photoelectrochemical hydrogen generation
AU - Chen, Chih Jung
AU - Veeramani, Vediyappan
AU - Wu, Yi Hsiu
AU - Jena, Anirudha
AU - Yin, Li Chang
AU - Chang, Ho
AU - Hu, Shu Fen
AU - Liu, Ru Shi
N1 - Funding Information:
The authors are grateful for the financial support from the Ministry of Science and Technology (Contract No. MOST 106-2112-M-003-007-MY3 and MOST 107-2113-M-002-008-MY3). The authors also thank the National Natural Science Fundation of China (NSFC No. 51472249 and 51972312) for financial support. The theoretical calculations in this work were performed on TianHe-1(A) at the National Supercomputer Center in Tianjin and Tianhe-2 at the National Supercomputer Center in Guangzhou.
Funding Information:
The authors are grateful for the financial support from the Ministry of Science and Technology (Contract No. MOST 106-2112-M-003-007-MY3 and MOST 107-2113-M-002-008-MY3 ). The authors also thank the National Natural Science Fundation of China (NSFC No. 51472249 and 51972312 ) for financial support. The theoretical calculations in this work were performed on TianHe-1(A) at the National Supercomputer Center in Tianjin and Tianhe-2 at the National Supercomputer Center in Guangzhou.
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/4
Y1 - 2020/4
N2 - Herein, molybdenum disulfide (MoS2) integrated on Si pyramids was used as a co-catalyst to improve charge separation efficiency. Various quantities of phosphorus (P) heteroatoms were doped into MoS2 materials to boost catalytic performance. Raman and extended X-ray absorption fine structure spectra showed that the introduction of P dopants increased the number of exposed edges and sulfur vacancies that acted as hydrogen evolution reaction (HER) active sites on MoS2 and enhanced photoelectrochemical activity. Density functional theory calculations revealed that the HER inert basal plane of MoS2 became catalytically active after P atoms doping. MoS1.75P0.25/Si pyramids presented the optimal onset potential of +0.29 V (vs. RHE) and current density −23.8 mA cm−2. A titanium dioxide (TiO2) layer was prepared through atomic layer deposition and served as a passivation layer that improved photocathode stability. The photocurrent retention of MoS1.75P0.25/10 nm TiO2/Si pyramids was 84.0% after 2 h of chronoamperometric measurement.
AB - Herein, molybdenum disulfide (MoS2) integrated on Si pyramids was used as a co-catalyst to improve charge separation efficiency. Various quantities of phosphorus (P) heteroatoms were doped into MoS2 materials to boost catalytic performance. Raman and extended X-ray absorption fine structure spectra showed that the introduction of P dopants increased the number of exposed edges and sulfur vacancies that acted as hydrogen evolution reaction (HER) active sites on MoS2 and enhanced photoelectrochemical activity. Density functional theory calculations revealed that the HER inert basal plane of MoS2 became catalytically active after P atoms doping. MoS1.75P0.25/Si pyramids presented the optimal onset potential of +0.29 V (vs. RHE) and current density −23.8 mA cm−2. A titanium dioxide (TiO2) layer was prepared through atomic layer deposition and served as a passivation layer that improved photocathode stability. The photocurrent retention of MoS1.75P0.25/10 nm TiO2/Si pyramids was 84.0% after 2 h of chronoamperometric measurement.
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U2 - 10.1016/j.apcatb.2019.118259
DO - 10.1016/j.apcatb.2019.118259
M3 - Article
AN - SCOPUS:85074241256
SN - 0926-3373
VL - 263
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 118259
ER -