Investigating the properties of perovskite oxide based electrocatalysts for oxygen evolution reaction (OER)

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2024-11-24 DOI:10.1007/s10971-024-06616-1

Areej S. Alqarni, Arooj Fatima, Abhinav Kumar, A. Dahshan

{"title":"Investigating the properties of perovskite oxide based electrocatalysts for oxygen evolution reaction (OER)","authors":"Areej S. Alqarni, Arooj Fatima, Abhinav Kumar, A. Dahshan","doi":"10.1007/s10971-024-06616-1","DOIUrl":null,"url":null,"abstract":"<div><p>Developing an efficient electrocatalyst for water splitting is imperative to improve the slow OER and store electrical energy as H<sub>2</sub> fuel. Creating an inexpensive development process for an effective OER electrocatalyst with features like a lot of active sites, a huge surface area (SA) and remarkable stability is vital for producing more H<sub>2</sub> and making it more widely available. We created the CoTiO<sub>3</sub>/rGO nanocomposite using hydrothermal method in basic solution to improve OER kinetics. The morphological structure of the CoTiO<sub>3</sub>/rGO was varied, showing CoTiO<sub>3</sub> nanoparticles anchored on rGO nanosheets to increase the electrolyte ions’ SA for adsorption. The CoTiO<sub>3</sub>/rGO electrocatalyst performs better than CoTiO<sub>3</sub>, as shown by its remarkable 38 h durability and overpotential (185 mV) at 10 mA/cm<sup>2</sup>. Additionally, compared to CoTiO<sub>3</sub> (56 mV/dec), the CoTiO<sub>3</sub>/rGO nanocomposite has a decreased Tafel slope (35 mV/dec). The larger SA and active site of the nanocomposite enhaned electrochemical characteristics of CoTiO<sub>3</sub>/rGO nanocomposite. The combination of a metal oxide with material produced from carbon offers a promising first step toward making an exceptional electrocatalyst for use in water electrochemistry.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"113 2","pages":"386 - 398"},"PeriodicalIF":2.3000,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-024-06616-1","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}

引用次数: 0

Abstract

Developing an efficient electrocatalyst for water splitting is imperative to improve the slow OER and store electrical energy as H₂ fuel. Creating an inexpensive development process for an effective OER electrocatalyst with features like a lot of active sites, a huge surface area (SA) and remarkable stability is vital for producing more H₂ and making it more widely available. We created the CoTiO₃/rGO nanocomposite using hydrothermal method in basic solution to improve OER kinetics. The morphological structure of the CoTiO₃/rGO was varied, showing CoTiO₃ nanoparticles anchored on rGO nanosheets to increase the electrolyte ions’ SA for adsorption. The CoTiO₃/rGO electrocatalyst performs better than CoTiO₃, as shown by its remarkable 38 h durability and overpotential (185 mV) at 10 mA/cm². Additionally, compared to CoTiO₃ (56 mV/dec), the CoTiO₃/rGO nanocomposite has a decreased Tafel slope (35 mV/dec). The larger SA and active site of the nanocomposite enhaned electrochemical characteristics of CoTiO₃/rGO nanocomposite. The combination of a metal oxide with material produced from carbon offers a promising first step toward making an exceptional electrocatalyst for use in water electrochemistry.

Graphical Abstract

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.