Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution
The electrocatalytic hydrogen evolution activity of transition metal sulfide heterojunctions are significantly increased when compared with that of a single component, but the mechanism behind the performance enhancement and the preparation of catalysts with specific morphologies still need to be ex...
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MDPI AG
2023-03-01
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| Series: | Biomimetics |
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| Online Access: | https://www.mdpi.com/2313-7673/8/1/104 |
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| author | Lili Zhang Jitang Zhang Aijiao Xu Zhiping Lin Zongpeng Wang Wenwu Zhong Shijie Shen Guangfeng Wu |
| author_facet | Lili Zhang Jitang Zhang Aijiao Xu Zhiping Lin Zongpeng Wang Wenwu Zhong Shijie Shen Guangfeng Wu |
| author_sort | Lili Zhang |
| collection | DOAJ |
| description | The electrocatalytic hydrogen evolution activity of transition metal sulfide heterojunctions are significantly increased when compared with that of a single component, but the mechanism behind the performance enhancement and the preparation of catalysts with specific morphologies still need to be explored. Here, we prepared a Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> heterojunction with microsphere morphology consisting of thin nanosheets using a facile two-step method. There is electron transfer between the Co<sub>9</sub>S<sub>8</sub> and MoS<sub>2</sub> of the heterojunction, thus realizing the redistribution of charge. After the formation of the heterojunction, the density of states near the Fermi surface increases, the <i>d</i>-band center of the transition metal moves downward, and the adsorption of both water molecules and hydrogen by the catalyst are optimized. As a result, the overpotential of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> is superior to that of most relevant electrocatalysts reported in the literature. This work provides insight into the synergistic mechanisms of heterojunctions and their morphological regulation. |
| first_indexed | 2024-03-11T06:52:53Z |
| format | Article |
| id | doaj.art-bc425761932b466ea9a298bc7859c399 |
| institution | Directory Open Access Journal |
| issn | 2313-7673 |
| language | English |
| last_indexed | 2024-03-11T06:52:53Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
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| series | Biomimetics |
| spelling | doaj.art-bc425761932b466ea9a298bc7859c3992023-11-17T09:50:22ZengMDPI AGBiomimetics2313-76732023-03-018110410.3390/biomimetics8010104Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen EvolutionLili Zhang0Jitang Zhang1Aijiao Xu2Zhiping Lin3Zongpeng Wang4Wenwu Zhong5Shijie Shen6Guangfeng Wu7College of Material Science and Engineering, Changchun University of Technology, Changchun 130051, ChinaZhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Jiaojiang 318000, ChinaZhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Jiaojiang 318000, ChinaZhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Jiaojiang 318000, ChinaZhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Jiaojiang 318000, ChinaZhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Jiaojiang 318000, ChinaZhejiang Provincial Key Laboratory for Cutting Tools, Taizhou University, Jiaojiang 318000, ChinaCollege of Material Science and Engineering, Changchun University of Technology, Changchun 130051, ChinaThe electrocatalytic hydrogen evolution activity of transition metal sulfide heterojunctions are significantly increased when compared with that of a single component, but the mechanism behind the performance enhancement and the preparation of catalysts with specific morphologies still need to be explored. Here, we prepared a Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> heterojunction with microsphere morphology consisting of thin nanosheets using a facile two-step method. There is electron transfer between the Co<sub>9</sub>S<sub>8</sub> and MoS<sub>2</sub> of the heterojunction, thus realizing the redistribution of charge. After the formation of the heterojunction, the density of states near the Fermi surface increases, the <i>d</i>-band center of the transition metal moves downward, and the adsorption of both water molecules and hydrogen by the catalyst are optimized. As a result, the overpotential of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> is superior to that of most relevant electrocatalysts reported in the literature. This work provides insight into the synergistic mechanisms of heterojunctions and their morphological regulation.https://www.mdpi.com/2313-7673/8/1/104heterojunctionthin nanosheetsCo<sub>9</sub>S<sub>8</sub>MoS<sub>2</sub>electrocatalysthydrogen evolution reaction |
| spellingShingle | Lili Zhang Jitang Zhang Aijiao Xu Zhiping Lin Zongpeng Wang Wenwu Zhong Shijie Shen Guangfeng Wu Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution Biomimetics heterojunction thin nanosheets Co<sub>9</sub>S<sub>8</sub> MoS<sub>2</sub> electrocatalyst hydrogen evolution reaction |
| title | Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution |
| title_full | Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution |
| title_fullStr | Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution |
| title_full_unstemmed | Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution |
| title_short | Charge Redistribution of Co<sub>9</sub>S<sub>8</sub>/MoS<sub>2</sub> Heterojunction Microsphere Enhances Electrocatalytic Hydrogen Evolution |
| title_sort | charge redistribution of co sub 9 sub s sub 8 sub mos sub 2 sub heterojunction microsphere enhances electrocatalytic hydrogen evolution |
| topic | heterojunction thin nanosheets Co<sub>9</sub>S<sub>8</sub> MoS<sub>2</sub> electrocatalyst hydrogen evolution reaction |
| url | https://www.mdpi.com/2313-7673/8/1/104 |
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