Development and characterization of rGO supported CdSMoS2 photoelectrochemical catalyst for splitting water by visible light |
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| Affiliation: | 1. Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Laboratory of Biopolymer and Derivatives, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;3. Enzyme and Microbial Technology Research Center (EMTech), Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;4. Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, 2-4 Hibikino, Wakamatsu, Kitakyushu 808-0196, Japan;5. Department of Chemical Engineering, Pennsylvania State University, 161 Fenske Laboratory, University Park, PA 16802, USA;1. Institute of Clean Energy Chemistry, Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, China;2. Centre for Translational Atomaterials, School of Science, Swinburne University of Technology, John Street, Hawthorn, VIC 3122, Australia;1. Department of Civil and Environment Engineering, University of Ulsan, Ulsan, Republic of Korea;2. Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606-8501, Japan;1. Department of Materials Science & Engineering, Ajou University, Suwon, 16499, South Korea;2. Department of Energy Systems Research, Ajou University, Suwon, 16499, South Korea;3. School of Advanced Materials Science & Engineering, Sungkyunkwan University, Suwon, 16419, South Korea |
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| Abstract: | Development of a mixed phase MoS2 (1T/2H) CdS supported on rGO photo-electrochemical catalyst for hydrogen production by splitting of water using visible light, has been reported. This catalyst showed a better efficiency compared to catalysts where either MoS2 was incorporated with CdS or MoS2 alone was supported on rGO. All the catalysts were photoactive under negative biasing. A detailed characterization of catalysts was performed using FTIR, XRD, DRS, HRSEM, HRTEM, SAED, XPS, and EIS etc. Higher activity of MoS2CdS-rGO correlated with the formation of a mixed phase of MoS2, as well as a heterojunction at the interfaces of MoS2CdS-rGO. Formation of the heterojunction and the presence of mixed phases of MoS2 have resulted into a better charge separation, a higher charge density and low resistance for charge transfer. These factors have attributed a higher efficiency of the catalyst. The probable mechanism of charge transfer is also discussed. |
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| Keywords: | Photo-electrochemical Photo-electrocatalysis Water splitting Hydrogen |
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