{"title":"用于增强氢气进化反应的低锌掺杂 Co3O4 纳米棒","authors":"","doi":"10.1016/j.jssc.2024.124945","DOIUrl":null,"url":null,"abstract":"<div><p>Transition metal oxides have been identified as the best potential candidates to replace Pt-based HER catalysts. But they are still limited by the high HER overpotential, due to the undesirable adsorption/desorption of surface hydrogen. In this work, Zn with low concentrations were incorporated into the tetrahedral Co<sup>2+</sup> sites of Co<sub>3</sub>O<sub>4</sub> by hydrothermal and subsequent annealing treatment. They exhibit excellent HER performance. Particularly, when the Zn content in Co<sub>3</sub>O<sub>4</sub> is 6.3 at%, an overpotential of 79.2 mV at the current density of 10 mA cm<sup>−2</sup> was obtained in alkaline medium, which significantly better than pure Co<sub>3</sub>O<sub>4</sub> catalyst (196.3 mV). Moreover, the current density of the Zn-doped Co<sub>3</sub>O<sub>4</sub> catalyst can maintained 93 % after 10 h and 80 % after 20 h. DFT calculations reveal that the Δ<em>G</em><sub><em>H*</em></sub> of Zn-doped Co<sub>3</sub>O<sub>4</sub> (0.827 eV) is smaller and closer to zero than pure Co<sub>3</sub>O<sub>4</sub> (1.023 eV). This work provides a deep insight into the rational design of low-level metal-doped cobalt oxide-based electrocatalysts.</p></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":null,"pages":null},"PeriodicalIF":3.2000,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Low Zn-doped Co3O4 nanorods for enhanced hydrogen evolution reaction\",\"authors\":\"\",\"doi\":\"10.1016/j.jssc.2024.124945\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Transition metal oxides have been identified as the best potential candidates to replace Pt-based HER catalysts. But they are still limited by the high HER overpotential, due to the undesirable adsorption/desorption of surface hydrogen. In this work, Zn with low concentrations were incorporated into the tetrahedral Co<sup>2+</sup> sites of Co<sub>3</sub>O<sub>4</sub> by hydrothermal and subsequent annealing treatment. They exhibit excellent HER performance. Particularly, when the Zn content in Co<sub>3</sub>O<sub>4</sub> is 6.3 at%, an overpotential of 79.2 mV at the current density of 10 mA cm<sup>−2</sup> was obtained in alkaline medium, which significantly better than pure Co<sub>3</sub>O<sub>4</sub> catalyst (196.3 mV). Moreover, the current density of the Zn-doped Co<sub>3</sub>O<sub>4</sub> catalyst can maintained 93 % after 10 h and 80 % after 20 h. DFT calculations reveal that the Δ<em>G</em><sub><em>H*</em></sub> of Zn-doped Co<sub>3</sub>O<sub>4</sub> (0.827 eV) is smaller and closer to zero than pure Co<sub>3</sub>O<sub>4</sub> (1.023 eV). This work provides a deep insight into the rational design of low-level metal-doped cobalt oxide-based electrocatalysts.</p></div>\",\"PeriodicalId\":378,\"journal\":{\"name\":\"Journal of Solid State Chemistry\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2024-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Solid State Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0022459624003992\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Solid State Chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022459624003992","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
Low Zn-doped Co3O4 nanorods for enhanced hydrogen evolution reaction
Transition metal oxides have been identified as the best potential candidates to replace Pt-based HER catalysts. But they are still limited by the high HER overpotential, due to the undesirable adsorption/desorption of surface hydrogen. In this work, Zn with low concentrations were incorporated into the tetrahedral Co2+ sites of Co3O4 by hydrothermal and subsequent annealing treatment. They exhibit excellent HER performance. Particularly, when the Zn content in Co3O4 is 6.3 at%, an overpotential of 79.2 mV at the current density of 10 mA cm−2 was obtained in alkaline medium, which significantly better than pure Co3O4 catalyst (196.3 mV). Moreover, the current density of the Zn-doped Co3O4 catalyst can maintained 93 % after 10 h and 80 % after 20 h. DFT calculations reveal that the ΔGH* of Zn-doped Co3O4 (0.827 eV) is smaller and closer to zero than pure Co3O4 (1.023 eV). This work provides a deep insight into the rational design of low-level metal-doped cobalt oxide-based electrocatalysts.
期刊介绍:
Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.