Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen Evolution
Efforts to develop high-performance electrocatalysts for the hydrogen evolution reaction (HER) are of utmost importance in ensuring sustainable hydrogen production. The controllable fabrication of inexpensive, durable, and high-efficient HER catalysts still remains a great challenge. Herein, we intr...
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MDPI AG
2024-03-01
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| author | Jingjing Zhang Wei Deng Yun Weng Jingxian Jiang Haifang Mao Wenqian Zhang Tiandong Lu Dewu Long Fei Jiang |
| author_facet | Jingjing Zhang Wei Deng Yun Weng Jingxian Jiang Haifang Mao Wenqian Zhang Tiandong Lu Dewu Long Fei Jiang |
| author_sort | Jingjing Zhang |
| collection | DOAJ |
| description | Efforts to develop high-performance electrocatalysts for the hydrogen evolution reaction (HER) are of utmost importance in ensuring sustainable hydrogen production. The controllable fabrication of inexpensive, durable, and high-efficient HER catalysts still remains a great challenge. Herein, we introduce a universal strategy aiming to achieve rapid synthesis of highly active hydrogen evolution catalysts using a controllable hydrogen insertion method and solvothermal process. Hydrogen vanadium bronze H<sub>x</sub>V<sub>2</sub>O<sub>5</sub> was obtained through controlling the ethanol reaction rate in the oxidization process of hydrogen peroxide. Subsequently, the intermetallic PtCoVO supported on two-dimensional graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) nanosheets was prepared by a solvothermal method at the oil/water interface. In terms of HER performance, PtCoVO/g-C<sub>3</sub>N<sub>4</sub> demonstrates superior characteristics compared to PtCo/g-C<sub>3</sub>N<sub>4</sub> and PtCoV/g-C<sub>3</sub>N<sub>4</sub>. This superiority can be attributed to the notable influence of oxygen vacancies in H<sub>x</sub>V<sub>2</sub>O<sub>5</sub> on the electrical properties of the catalyst. By adjusting the relative proportions of metal atoms in the PtCoVO/g-C<sub>3</sub>N<sub>4</sub> nanomaterials, the PtCoVO/g-C<sub>3</sub>N<sub>4</sub> nanocomposites show significant HER overpotential of η<sub>10</sub> = 92 mV, a Tafel slope of 65.21 mV dec<sup>−1</sup>, and outstanding stability (a continuous test lasting 48 h). The nanoarchitecture of a g-C<sub>3</sub>N<sub>4</sub>-supported PtCoVO nanoalloy catalyst exhibits exceptional resistance to nanoparticle migration and corrosion, owing to the strong interaction between the metal nanoparticles and the g-C<sub>3</sub>N<sub>4</sub> support. Pt, Co, and V simultaneous doping has been shown by Density Functional Theory (DFT) calculations to enhance the density of states (DOS) at the Fermi level. This augmentation leads to a higher charge density and a reduction in the adsorption energy of intermediates. |
| first_indexed | 2024-04-24T10:39:40Z |
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| id | doaj.art-f6dd69192a524824bf6a89a6df733d6f |
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| spelling | doaj.art-f6dd69192a524824bf6a89a6df733d6f2024-04-12T13:23:17ZengMDPI AGMolecules1420-30492024-03-01297151810.3390/molecules29071518Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen EvolutionJingjing Zhang0Wei Deng1Yun Weng2Jingxian Jiang3Haifang Mao4Wenqian Zhang5Tiandong Lu6Dewu Long7Fei Jiang8School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaSchool of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaState Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Textile, Donghua University, Shanghai 201620, ChinaSchool of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaSchool of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaSchool of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaSchool of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaKey Laboratory in Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, ChinaSchool of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, ChinaEfforts to develop high-performance electrocatalysts for the hydrogen evolution reaction (HER) are of utmost importance in ensuring sustainable hydrogen production. The controllable fabrication of inexpensive, durable, and high-efficient HER catalysts still remains a great challenge. Herein, we introduce a universal strategy aiming to achieve rapid synthesis of highly active hydrogen evolution catalysts using a controllable hydrogen insertion method and solvothermal process. Hydrogen vanadium bronze H<sub>x</sub>V<sub>2</sub>O<sub>5</sub> was obtained through controlling the ethanol reaction rate in the oxidization process of hydrogen peroxide. Subsequently, the intermetallic PtCoVO supported on two-dimensional graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) nanosheets was prepared by a solvothermal method at the oil/water interface. In terms of HER performance, PtCoVO/g-C<sub>3</sub>N<sub>4</sub> demonstrates superior characteristics compared to PtCo/g-C<sub>3</sub>N<sub>4</sub> and PtCoV/g-C<sub>3</sub>N<sub>4</sub>. This superiority can be attributed to the notable influence of oxygen vacancies in H<sub>x</sub>V<sub>2</sub>O<sub>5</sub> on the electrical properties of the catalyst. By adjusting the relative proportions of metal atoms in the PtCoVO/g-C<sub>3</sub>N<sub>4</sub> nanomaterials, the PtCoVO/g-C<sub>3</sub>N<sub>4</sub> nanocomposites show significant HER overpotential of η<sub>10</sub> = 92 mV, a Tafel slope of 65.21 mV dec<sup>−1</sup>, and outstanding stability (a continuous test lasting 48 h). The nanoarchitecture of a g-C<sub>3</sub>N<sub>4</sub>-supported PtCoVO nanoalloy catalyst exhibits exceptional resistance to nanoparticle migration and corrosion, owing to the strong interaction between the metal nanoparticles and the g-C<sub>3</sub>N<sub>4</sub> support. Pt, Co, and V simultaneous doping has been shown by Density Functional Theory (DFT) calculations to enhance the density of states (DOS) at the Fermi level. This augmentation leads to a higher charge density and a reduction in the adsorption energy of intermediates.https://www.mdpi.com/1420-3049/29/7/1518hydrogen evolution reactionelectrocatalystspolymetallic compoundshydrogen metal oxide bronzes |
| spellingShingle | Jingjing Zhang Wei Deng Yun Weng Jingxian Jiang Haifang Mao Wenqian Zhang Tiandong Lu Dewu Long Fei Jiang Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen Evolution Molecules hydrogen evolution reaction electrocatalysts polymetallic compounds hydrogen metal oxide bronzes |
| title | Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen Evolution |
| title_full | Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen Evolution |
| title_fullStr | Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen Evolution |
| title_full_unstemmed | Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen Evolution |
| title_short | Intercalated PtCo Electrocatalyst of Vanadium Metal Oxide Increases Charge Density to Facilitate Hydrogen Evolution |
| title_sort | intercalated ptco electrocatalyst of vanadium metal oxide increases charge density to facilitate hydrogen evolution |
| topic | hydrogen evolution reaction electrocatalysts polymetallic compounds hydrogen metal oxide bronzes |
| url | https://www.mdpi.com/1420-3049/29/7/1518 |
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