In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution Reaction
In order to synthesize a high-efficiency catalytic electrode for hydrogen evolution reactions, nano-MoS<sub>2</sub> was deposited in situ on the surface of graphite substrates via a one-step hydrothermal method. The effects of the reactant concentration on the microstructure and the elec...
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| author | Yifan Zhao Mingyang Zhang Huimin Zhao Zhiqiang Zeng Chaoqun Xia Tai Yang |
| author_facet | Yifan Zhao Mingyang Zhang Huimin Zhao Zhiqiang Zeng Chaoqun Xia Tai Yang |
| author_sort | Yifan Zhao |
| collection | DOAJ |
| description | In order to synthesize a high-efficiency catalytic electrode for hydrogen evolution reactions, nano-MoS<sub>2</sub> was deposited in situ on the surface of graphite substrates via a one-step hydrothermal method. The effects of the reactant concentration on the microstructure and the electrocatalytic characteristics of the nano-MoS<sub>2</sub> catalyst layers were investigated in detail. The study results showed that nano-MoS<sub>2</sub> sheets with a thickness of about 10 nm were successfully deposited on the surface of the graphite substrates. The reactant concentration had an important effect on uniform distribution of the catalyst layers. A higher or lower reactant concentration was disadvantageous for the electrochemical performance of the nano-MoS<sub>2</sub> catalyst layers. The prepared electrode had the best electrocatalytic activity when the thiourea concentration was 0.10 mol·L<sup>−1</sup>. The minimum hydrogen evolution reaction overpotential was 196 mV (<i>j</i> = 10 mV·cm<sup>−2</sup>) and the corresponding Tafel slope was calculated to be 54.1 mV·dec<sup>−1</sup>. Moreover, the prepared electrode had an excellent cycling stability, and the microstructure and the electrocatalytic properties of the electrode had almost no change after 2000 cycles. The results of the present study are helpful for developing low-cost and efficient electrode material for hydrogen evolution reactions. |
| first_indexed | 2024-03-11T01:36:07Z |
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| id | doaj.art-5bd1efd1bbaa42d68cf32f595d48be7b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T01:36:07Z |
| publishDate | 2023-06-01 |
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| spelling | doaj.art-5bd1efd1bbaa42d68cf32f595d48be7b2023-11-18T16:57:30ZengMDPI AGMaterials1996-19442023-06-011613462710.3390/ma16134627In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution ReactionYifan Zhao0Mingyang Zhang1Huimin Zhao2Zhiqiang Zeng3Chaoqun Xia4Tai Yang5School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaIn order to synthesize a high-efficiency catalytic electrode for hydrogen evolution reactions, nano-MoS<sub>2</sub> was deposited in situ on the surface of graphite substrates via a one-step hydrothermal method. The effects of the reactant concentration on the microstructure and the electrocatalytic characteristics of the nano-MoS<sub>2</sub> catalyst layers were investigated in detail. The study results showed that nano-MoS<sub>2</sub> sheets with a thickness of about 10 nm were successfully deposited on the surface of the graphite substrates. The reactant concentration had an important effect on uniform distribution of the catalyst layers. A higher or lower reactant concentration was disadvantageous for the electrochemical performance of the nano-MoS<sub>2</sub> catalyst layers. The prepared electrode had the best electrocatalytic activity when the thiourea concentration was 0.10 mol·L<sup>−1</sup>. The minimum hydrogen evolution reaction overpotential was 196 mV (<i>j</i> = 10 mV·cm<sup>−2</sup>) and the corresponding Tafel slope was calculated to be 54.1 mV·dec<sup>−1</sup>. Moreover, the prepared electrode had an excellent cycling stability, and the microstructure and the electrocatalytic properties of the electrode had almost no change after 2000 cycles. The results of the present study are helpful for developing low-cost and efficient electrode material for hydrogen evolution reactions.https://www.mdpi.com/1996-1944/16/13/4627hydrogen evolution reactioncatalystgraphiteMoS<sub>2</sub>in situ deposition |
| spellingShingle | Yifan Zhao Mingyang Zhang Huimin Zhao Zhiqiang Zeng Chaoqun Xia Tai Yang In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution Reaction Materials hydrogen evolution reaction catalyst graphite MoS<sub>2</sub> in situ deposition |
| title | In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution Reaction |
| title_full | In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution Reaction |
| title_fullStr | In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution Reaction |
| title_full_unstemmed | In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution Reaction |
| title_short | In Situ Growth of Nano-MoS<sub>2</sub> on Graphite Substrates as Catalysts for Hydrogen Evolution Reaction |
| title_sort | in situ growth of nano mos sub 2 sub on graphite substrates as catalysts for hydrogen evolution reaction |
| topic | hydrogen evolution reaction catalyst graphite MoS<sub>2</sub> in situ deposition |
| url | https://www.mdpi.com/1996-1944/16/13/4627 |
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