Novel scandium-doped cobalt chromate: Dopamine sensing and superior supercapacitor performance

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: B Pub Date : 2025-04-09 DOI:10.1016/j.mseb.2025.118306

Nandini Robin Nadar , J. Deepak , S.C. Sharma , B.R. Radha Krushna , Chitathoor Sridhar , Subhashree Ray , R. Vini , H. Nagabhushana , R. Sowjanya , Puneeth B

{"title":"Novel scandium-doped cobalt chromate: Dopamine sensing and superior supercapacitor performance","authors":"Nandini Robin Nadar , J. Deepak , S.C. Sharma , B.R. Radha Krushna , Chitathoor Sridhar , Subhashree Ray , R. Vini , H. Nagabhushana , R. Sowjanya , Puneeth B","doi":"10.1016/j.mseb.2025.118306","DOIUrl":null,"url":null,"abstract":"<div><div>This study explores the electrochemical properties of scandium-doped cobalt chromate (SCC) for use in supercapacitors and dopamine sensors. The SCC-modified carbon paste electrode (MCPE) demonstrated a significantly enhanced electrochemically active surface area. Additionally, the SCC MCPE showed superior selectivity for dopamine (DA) detection, with a limit of detection (LOD) of 0.329 µM and an exceptional linear response (R<sup>2</sup> = 0.998) distinguishing DA from uric acid (UA), alongside a stability of approximately 91 % over 20 cycles. Cyclic voltammetry (CV) indicated enhanced redox behavior due to the incorporation of scandium. For supercapacitor applications, SCC nanocomposites were evaluated using CV and galvanostatic charge/discharge techniques, showing a specific capacitance of 250.53F g<sup>−1</sup> at 2 mV s<sup>−1</sup>, excellent stability over 5000 cycles with an 83.33 % retention rate, and notable energy storage and power delivery capabilities as illustrated by the Ragone plot. These findings underscore the potential of SCC nanocomposites for advanced electrochemical applications.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering: B","volume":"318 ","pages":"Article 118306"},"PeriodicalIF":4.6000,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Science and Engineering: B","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921510725003290","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

This study explores the electrochemical properties of scandium-doped cobalt chromate (SCC) for use in supercapacitors and dopamine sensors. The SCC-modified carbon paste electrode (MCPE) demonstrated a significantly enhanced electrochemically active surface area. Additionally, the SCC MCPE showed superior selectivity for dopamine (DA) detection, with a limit of detection (LOD) of 0.329 µM and an exceptional linear response (R² = 0.998) distinguishing DA from uric acid (UA), alongside a stability of approximately 91 % over 20 cycles. Cyclic voltammetry (CV) indicated enhanced redox behavior due to the incorporation of scandium. For supercapacitor applications, SCC nanocomposites were evaluated using CV and galvanostatic charge/discharge techniques, showing a specific capacitance of 250.53F g⁻¹ at 2 mV s⁻¹, excellent stability over 5000 cycles with an 83.33 % retention rate, and notable energy storage and power delivery capabilities as illustrated by the Ragone plot. These findings underscore the potential of SCC nanocomposites for advanced electrochemical applications.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

新型钪掺杂钴铬酸盐：多巴胺传感和优越的超级电容器性能

本研究探讨了用于超级电容器和多巴胺传感器的钪掺杂钴铬酸盐（SCC）的电化学性能。scc修饰的碳糊电极（MCPE）的电化学活性表面积显著增强。此外，SCC MCPE在多巴胺（DA）检测方面表现出优越的选择性，检测限（LOD）为0.329µM，区分DA和尿酸（UA）的异常线性响应（R2 = 0.998），在20个周期内稳定性约为91%。循环伏安法（CV）表明钪的掺入增强了氧化还原行为。对于超级电容器的应用，采用CV和恒流充放电技术对SCC纳米复合材料进行了评估，结果表明，SCC纳米复合材料在2 mV s−1下的比电容为250.53F g−1，在5000次循环中具有优异的稳定性，保持率为83.33%，并且具有显著的能量存储和电力输送能力，如图所示。这些发现强调了SCC纳米复合材料在高级电化学应用方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.