Yiwen Li , Zhengju Zhu , Yu Lin Zhong , Yifan Jin , Petr Saha , Qiling Cheng
{"title":"用于高效整体水分离的掺杂铬的异质 Co3S4/NiMoS4 双功能电催化剂","authors":"Yiwen Li , Zhengju Zhu , Yu Lin Zhong , Yifan Jin , Petr Saha , Qiling Cheng","doi":"10.1016/j.jpowsour.2024.234969","DOIUrl":null,"url":null,"abstract":"<div><p>Exploration of efficient and robust catalysts for electrocatalytic water splitting is paramount yet challenging for economical hydrogen production. Here, nanoforest-like heterostructures composed of inner NiMoS<sub>4</sub> nanowires and outer Cr-doped Co<sub>3</sub>S<sub>4</sub> nanosheets were grown on nickel foams (Cr–Co<sub>3</sub>S<sub>4</sub>/NiMoS<sub>4</sub>) as highly efficient bifunctional electrocatalysts. As a result, Cr–Co<sub>3</sub>S<sub>4</sub>/NiMoS<sub>4</sub> heterostructures exhibit low overpotentials of 72 mV and 243 mV for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at 10 mA cm<sup>−2</sup>, respectively. Moreover, the water electrolyzer assembled by Cr–Co<sub>3</sub>S<sub>4</sub>/NiMoS<sub>4</sub> as bifunctional electrodes reaches 10 mA cm<sup>−2</sup> at 1.587 V and maintains exceptional stability over 200 h. The experimental and theoretical characterizations collectively unveil that the charge redistribution occurs at the heterointerface between Cr-doped Co<sub>3</sub>S<sub>4</sub> and NiMoS<sub>4</sub>, resulting in the regulation of both their electronic structures, which optimizes the adsorption of HER intermediates and decreases the energy barrier of determining step for OER. Additionally, the Cr doping and nanoforest-like morphology increase the intrinsic conductivity and the exposure of active sites, collectively improving the water electrolysis efficiency. This finding presents a promising way to construct and adjust the heterojunction engineering for bifunctional electrocatalysts toward water electrolysis.</p></div>","PeriodicalId":377,"journal":{"name":"Journal of Power Sources","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Heterogeneous Cr-doped Co3S4/NiMoS4 bifunctional electrocatalyst for efficient overall water splitting\",\"authors\":\"Yiwen Li , Zhengju Zhu , Yu Lin Zhong , Yifan Jin , Petr Saha , Qiling Cheng\",\"doi\":\"10.1016/j.jpowsour.2024.234969\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Exploration of efficient and robust catalysts for electrocatalytic water splitting is paramount yet challenging for economical hydrogen production. Here, nanoforest-like heterostructures composed of inner NiMoS<sub>4</sub> nanowires and outer Cr-doped Co<sub>3</sub>S<sub>4</sub> nanosheets were grown on nickel foams (Cr–Co<sub>3</sub>S<sub>4</sub>/NiMoS<sub>4</sub>) as highly efficient bifunctional electrocatalysts. As a result, Cr–Co<sub>3</sub>S<sub>4</sub>/NiMoS<sub>4</sub> heterostructures exhibit low overpotentials of 72 mV and 243 mV for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at 10 mA cm<sup>−2</sup>, respectively. Moreover, the water electrolyzer assembled by Cr–Co<sub>3</sub>S<sub>4</sub>/NiMoS<sub>4</sub> as bifunctional electrodes reaches 10 mA cm<sup>−2</sup> at 1.587 V and maintains exceptional stability over 200 h. The experimental and theoretical characterizations collectively unveil that the charge redistribution occurs at the heterointerface between Cr-doped Co<sub>3</sub>S<sub>4</sub> and NiMoS<sub>4</sub>, resulting in the regulation of both their electronic structures, which optimizes the adsorption of HER intermediates and decreases the energy barrier of determining step for OER. Additionally, the Cr doping and nanoforest-like morphology increase the intrinsic conductivity and the exposure of active sites, collectively improving the water electrolysis efficiency. This finding presents a promising way to construct and adjust the heterojunction engineering for bifunctional electrocatalysts toward water electrolysis.</p></div>\",\"PeriodicalId\":377,\"journal\":{\"name\":\"Journal of Power Sources\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-06-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Power Sources\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0378775324009212\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Power Sources","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378775324009212","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Heterogeneous Cr-doped Co3S4/NiMoS4 bifunctional electrocatalyst for efficient overall water splitting
Exploration of efficient and robust catalysts for electrocatalytic water splitting is paramount yet challenging for economical hydrogen production. Here, nanoforest-like heterostructures composed of inner NiMoS4 nanowires and outer Cr-doped Co3S4 nanosheets were grown on nickel foams (Cr–Co3S4/NiMoS4) as highly efficient bifunctional electrocatalysts. As a result, Cr–Co3S4/NiMoS4 heterostructures exhibit low overpotentials of 72 mV and 243 mV for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) at 10 mA cm−2, respectively. Moreover, the water electrolyzer assembled by Cr–Co3S4/NiMoS4 as bifunctional electrodes reaches 10 mA cm−2 at 1.587 V and maintains exceptional stability over 200 h. The experimental and theoretical characterizations collectively unveil that the charge redistribution occurs at the heterointerface between Cr-doped Co3S4 and NiMoS4, resulting in the regulation of both their electronic structures, which optimizes the adsorption of HER intermediates and decreases the energy barrier of determining step for OER. Additionally, the Cr doping and nanoforest-like morphology increase the intrinsic conductivity and the exposure of active sites, collectively improving the water electrolysis efficiency. This finding presents a promising way to construct and adjust the heterojunction engineering for bifunctional electrocatalysts toward water electrolysis.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems