{"title":"Polyoxometalate-mediated growth of O-SnS@Cu2S heteronanosheets for high-performance oxygen and hydrogen evolution reactions","authors":"","doi":"10.1007/s13204-023-02994-0","DOIUrl":null,"url":null,"abstract":"<h3>Abstract</h3> <p>To properly exploit undepleted sources of energy through energy conversion devices using water splitting reactions, there is a need for cost-effective, easily accessible, and long-lasting materials that are capable of performing bifunctional activity like hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this study, oxygen incorporation into SnS@Cu<sub>2</sub>S (O-SnS@Cu<sub>2</sub>S) heteronanosheets was architecture on Nickel foam utilizing polyoxometalate as bimetal precursors, and then this material exhibited superior activity, requiring only a small overpotential to generate high current densities compared to individual O-SnS and O-Cu<sub>2</sub>S arrays for the electrocatalytic HER activity. The Tafel slopes (26 mV dec<sup>−1</sup>) and electrochemical impedance spectroscopy (EIS) (<em>R</em><sub>ct</sub> = 1.2 Ω), further confirmed the favorable kinetics and conductivity of the O-SnS@Cu<sub>2</sub>S array. When compared to the O-Cu<sub>2</sub>S and O-SnS nanosheet arrays, the bimetal sulphides O-SnS@Cu<sub>2</sub>S array had much lower overpotentials, requiring only 170 mV and 232 mV, respectively, to achieve a current density of 10 mA cm<sup>−2</sup> in an alkaline solution for HER and OER. The O-SnS@Cu<sub>2</sub>S nanosheet array outperformed SnS and Cu<sub>2</sub>S, requiring lower overpotentials to achieve high current densities. The smaller value of Tafel slopes (23 mV dec<sup>−1</sup> for O-SnS@Cu<sub>2</sub>S) indicated improved kinetics, and EIS demonstrated a lower polarization resistance (<em>R</em><sub>ct</sub> = 0.2 Ω) for the O-SnS@Cu<sub>2</sub>S array. Importantly, the O-SnS@Cu<sub>2</sub>S array exhibited remarkable stability in alkaline electrolyte cycling experiments, making it an outstanding material for practical applications in energy conversion devices. This research proposes a feasible technique for the development of efficient and stable bifunctional bimetal-sulfide electrocatalysts with enormous potential for use in renewable energy.</p>","PeriodicalId":471,"journal":{"name":"Applied Nanoscience","volume":null,"pages":null},"PeriodicalIF":3.6740,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Nanoscience","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1007/s13204-023-02994-0","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 0
Abstract
To properly exploit undepleted sources of energy through energy conversion devices using water splitting reactions, there is a need for cost-effective, easily accessible, and long-lasting materials that are capable of performing bifunctional activity like hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). In this study, oxygen incorporation into SnS@Cu2S (O-SnS@Cu2S) heteronanosheets was architecture on Nickel foam utilizing polyoxometalate as bimetal precursors, and then this material exhibited superior activity, requiring only a small overpotential to generate high current densities compared to individual O-SnS and O-Cu2S arrays for the electrocatalytic HER activity. The Tafel slopes (26 mV dec−1) and electrochemical impedance spectroscopy (EIS) (Rct = 1.2 Ω), further confirmed the favorable kinetics and conductivity of the O-SnS@Cu2S array. When compared to the O-Cu2S and O-SnS nanosheet arrays, the bimetal sulphides O-SnS@Cu2S array had much lower overpotentials, requiring only 170 mV and 232 mV, respectively, to achieve a current density of 10 mA cm−2 in an alkaline solution for HER and OER. The O-SnS@Cu2S nanosheet array outperformed SnS and Cu2S, requiring lower overpotentials to achieve high current densities. The smaller value of Tafel slopes (23 mV dec−1 for O-SnS@Cu2S) indicated improved kinetics, and EIS demonstrated a lower polarization resistance (Rct = 0.2 Ω) for the O-SnS@Cu2S array. Importantly, the O-SnS@Cu2S array exhibited remarkable stability in alkaline electrolyte cycling experiments, making it an outstanding material for practical applications in energy conversion devices. This research proposes a feasible technique for the development of efficient and stable bifunctional bimetal-sulfide electrocatalysts with enormous potential for use in renewable energy.
期刊介绍：
Applied Nanoscience is a hybrid journal that publishes original articles about state of the art nanoscience and the application of emerging nanotechnologies to areas fundamental to building technologically advanced and sustainable civilization, including areas as diverse as water science, advanced materials, energy, electronics, environmental science and medicine. The journal accepts original and review articles as well as book reviews for publication. All the manuscripts are single-blind peer-reviewed for scientific quality and acceptance.
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