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Title: Hydrogen generation via photoelectrochemical water splitting using chemically exfoliated MoS{sub 2} layers

Study on hydrogen generation has been of huge interest due to increasing demand for new energy sources. Photoelectrochemical reaction by catalysts was proposed as a promising technique for hydrogen generation. Herein, we report the hydrogen generation via photoelectrochecmial reaction using films of exfoliated 2-dimensional (2D) MoS{sub 2}, which acts as an efficient photocatalyst. The film of chemically exfoliated MoS{sub 2} layers was employed for water splitting, leading to hydrogen generation. The amount of hydrogen was qualitatively monitored by observing overpressure of a water container. The high photo-current generated by MoS{sub 2} film resulted in hydrogen evolution. Our work shows that 2D MoS{sub 2} is one of the promising candidates as a photocatalyst for light-induced hydrogen generation. High photoelectrocatalytic efficiency of the 2D MoS{sub 2} shows a new way toward hydrogen generation, which is one of the renewable energy sources. The efficient photoelectrocatalytic property of the 2D MoS{sub 2} is possibly due to availability of catalytically active edge sites together with minimal stacking that favors the electron transfer.
Authors:
;  [1] ; ;  [2] ;  [3] ;  [4]
  1. Centre for Sustainable Materials Research and Technology, School of Materials Science and Engineering, University of New South Wales, NSW 2052 (Australia)
  2. Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai (India)
  3. Department of Material Science and Engineering, Yonsei University, Seoul 120-749 (Korea, Republic of)
  4. CSIR-Central Electrochemical Research Institute, Karaikudi 630006, Tamilnadu (India)
Publication Date:
OSTI Identifier:
22492421
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 6; Journal Issue: 1; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AVAILABILITY; CATALYSTS; ELECTROCHEMISTRY; ELECTRON TRANSFER; FILMS; HYDROGEN; INTERSTITIAL HYDROGEN GENERATION; LAYERS; MOLYBDENUM SULFIDES; PHOTOCHEMISTRY; PHOTOCURRENTS; RENEWABLE ENERGY SOURCES; TWO-DIMENSIONAL SYSTEMS; VISIBLE RADIATION; WATER