Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions

Molybdenum disulfide (MoS2) nanosheets of 10 ± 2 nm in thickness loaded on reduced graphene oxide (rGO) paper were fabricated using a one-step solvothermal method. Differing concentration of tri-octylphosphine (TOP) were used during the fabrication process to determine the effects on the resultant M...

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Main Author: Toh, Zhi Wei
Other Authors: Zhang Hua
Format: Final Year Project
Language:English
Published: 2015
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Online Access:http://hdl.handle.net/10356/62370
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-623702023-03-04T15:33:00Z Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions Toh, Zhi Wei Zhang Hua School of Materials Science and Engineering DRNTU::Engineering::Materials::Energy materials Molybdenum disulfide (MoS2) nanosheets of 10 ± 2 nm in thickness loaded on reduced graphene oxide (rGO) paper were fabricated using a one-step solvothermal method. Differing concentration of tri-octylphosphine (TOP) were used during the fabrication process to determine the effects on the resultant MoS2/rGO system. Scanning electron microscopy (SEM) reveals an abundance of MoS2 self-assembled edges on the rGO paper. Energy-dispersive X-ray spectroscopy (EDX) also confirmed the presence of MoS2 nanosheets on the rGO paper. X-ray diffraction (XRD) patterns also showed that the MoS2 exists in an amorphous or nanosheet form. The resultant MoS2/rGO papers were tested for hydrogen evolution reaction (HER) and an average Tafel slope of 54 mV/decade at an overpotential of -0.15V was achieved for all samples. After conducting a stability test on all samples, the results showed that adding more than 2μl of TOP in 20ml of solution, TOP stabilizes the MoS2 adhesion to the rGO paper and exhibits good stability with negligible current losses. This method showed itself to be an easily reproducible method where highly efficient MoS2 based HER catalysts could be developed. Bachelor of Engineering (Materials Engineering) 2015-03-24T02:37:57Z 2015-03-24T02:37:57Z 2015 2015 Final Year Project (FYP) http://hdl.handle.net/10356/62370 en Nanyang Technological University 61 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Energy materials
spellingShingle DRNTU::Engineering::Materials::Energy materials
Toh, Zhi Wei
Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions
description Molybdenum disulfide (MoS2) nanosheets of 10 ± 2 nm in thickness loaded on reduced graphene oxide (rGO) paper were fabricated using a one-step solvothermal method. Differing concentration of tri-octylphosphine (TOP) were used during the fabrication process to determine the effects on the resultant MoS2/rGO system. Scanning electron microscopy (SEM) reveals an abundance of MoS2 self-assembled edges on the rGO paper. Energy-dispersive X-ray spectroscopy (EDX) also confirmed the presence of MoS2 nanosheets on the rGO paper. X-ray diffraction (XRD) patterns also showed that the MoS2 exists in an amorphous or nanosheet form. The resultant MoS2/rGO papers were tested for hydrogen evolution reaction (HER) and an average Tafel slope of 54 mV/decade at an overpotential of -0.15V was achieved for all samples. After conducting a stability test on all samples, the results showed that adding more than 2μl of TOP in 20ml of solution, TOP stabilizes the MoS2 adhesion to the rGO paper and exhibits good stability with negligible current losses. This method showed itself to be an easily reproducible method where highly efficient MoS2 based HER catalysts could be developed.
author2 Zhang Hua
author_facet Zhang Hua
Toh, Zhi Wei
format Final Year Project
author Toh, Zhi Wei
author_sort Toh, Zhi Wei
title Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions
title_short Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions
title_full Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions
title_fullStr Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions
title_full_unstemmed Preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions
title_sort preparation of metal dichalcogenide based nanomaterials for hydrogen evolution reactions
publishDate 2015
url http://hdl.handle.net/10356/62370
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