Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons
Electrochemical hydrogen evolution reaction (HER) using non-precious compounds has gained substantial interest in the development of water electrolyzers. Herein, we report the synthesis of Copper sulfide (Cu2S) micro-hexagons via a hydrothermal method, followed by some of the important physiochemica...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-09-01
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| Series: | Journal of Science: Advanced Materials and Devices |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468217920300526 |
| _version_ | 1828793326628765696 |
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| author | Karthik S. Bhat H.S. Nagaraja |
| author_facet | Karthik S. Bhat H.S. Nagaraja |
| author_sort | Karthik S. Bhat |
| collection | DOAJ |
| description | Electrochemical hydrogen evolution reaction (HER) using non-precious compounds has gained substantial interest in the development of water electrolyzers. Herein, we report the synthesis of Copper sulfide (Cu2S) micro-hexagons via a hydrothermal method, followed by some of the important physiochemical characterizations and electrochemical measurements towards the HER. Cu2S micro-hexagons could catalyze the HER in both basic (1 M KOH) and acidic solutions (0.5 M H2SO4), corresponding to the extreme pH values of 14 and 0, respectively. As manifested from the polarization curve, Cu2S micro-hexagons required an overpotential of −330 mV and −312 mV to deliver a benchmark catalytic current density of 10 mA cm−2 in basic and acidic solutions, respectively. Furthermore, lower overpotentials are complemented with the prominent long-term stability of 24 h, as evident from chronopotentiometric analysis. The superior electrochemical performance of these Cu2S micro-hexagons demonstrates their promising suitability for water-splitting applications. |
| first_indexed | 2024-12-12T03:25:33Z |
| format | Article |
| id | doaj.art-260971202e8d4fc3840a7d3b6fe656e4 |
| institution | Directory Open Access Journal |
| issn | 2468-2179 |
| language | English |
| last_indexed | 2024-12-12T03:25:33Z |
| publishDate | 2020-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Science: Advanced Materials and Devices |
| spelling | doaj.art-260971202e8d4fc3840a7d3b6fe656e42022-12-22T00:40:03ZengElsevierJournal of Science: Advanced Materials and Devices2468-21792020-09-0153361367Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagonsKarthik S. Bhat0H.S. Nagaraja1Corresponding author.; Department of Physics, National Institute of Technology Karnataka, P.O. Srinivasnagar, Surathkal, Mangaluru, 575 025, IndiaCorresponding author.; Department of Physics, National Institute of Technology Karnataka, P.O. Srinivasnagar, Surathkal, Mangaluru, 575 025, IndiaElectrochemical hydrogen evolution reaction (HER) using non-precious compounds has gained substantial interest in the development of water electrolyzers. Herein, we report the synthesis of Copper sulfide (Cu2S) micro-hexagons via a hydrothermal method, followed by some of the important physiochemical characterizations and electrochemical measurements towards the HER. Cu2S micro-hexagons could catalyze the HER in both basic (1 M KOH) and acidic solutions (0.5 M H2SO4), corresponding to the extreme pH values of 14 and 0, respectively. As manifested from the polarization curve, Cu2S micro-hexagons required an overpotential of −330 mV and −312 mV to deliver a benchmark catalytic current density of 10 mA cm−2 in basic and acidic solutions, respectively. Furthermore, lower overpotentials are complemented with the prominent long-term stability of 24 h, as evident from chronopotentiometric analysis. The superior electrochemical performance of these Cu2S micro-hexagons demonstrates their promising suitability for water-splitting applications.http://www.sciencedirect.com/science/article/pii/S2468217920300526Copper chalcogenidesSulfidesHydrogen evolution reaction |
| spellingShingle | Karthik S. Bhat H.S. Nagaraja Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons Journal of Science: Advanced Materials and Devices Copper chalcogenides Sulfides Hydrogen evolution reaction |
| title | Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons |
| title_full | Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons |
| title_fullStr | Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons |
| title_full_unstemmed | Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons |
| title_short | Hydrogen evolution reaction at extreme pH conditions of copper sulfide micro-hexagons |
| title_sort | hydrogen evolution reaction at extreme ph conditions of copper sulfide micro hexagons |
| topic | Copper chalcogenides Sulfides Hydrogen evolution reaction |
| url | http://www.sciencedirect.com/science/article/pii/S2468217920300526 |
| work_keys_str_mv | AT karthiksbhat hydrogenevolutionreactionatextremephconditionsofcoppersulfidemicrohexagons AT hsnagaraja hydrogenevolutionreactionatextremephconditionsofcoppersulfidemicrohexagons |