1-Ethyl-3-methylimidazolium chloride-TaCl5 이온성 액체 기반 전해질에서 탄탈륨 이온의 전기화학적 환원 거동 관찰 연구

• Published in: 한국표면공학회지, 58(4) pp. 204 - 210
• Main Authors: 권태윤, 이준영, 권예리, 김세일, 이주열, 이규환, 최승회, 김승현, 박영배, 유병욱
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 01.08.2025
• Subjects: 기계공학
• ISSN: 1225-8024; 2288-8403

Electrochemical reduction behavior of tantalum ions was explored in a chloride-based ionic liquid electrolyte comprising 1-ethyl-3-methylimidazolium chloride (EMIC) and tantalum pentachloride (TaCl5). cyclic voltammetry (CV) was employed to assess reduction potentials, electrochemical reversibility under varying scan rates, and thermal effects on reaction characteristics. Two distinct reduction stages were identified at -0.56 V and -1.07 V, indicating a multistep mechanism. The redox behavior was found to be diffusion-controlled, with ipa/ipc ratios below unity confirming quasi-reversible characteristics. The electron transfer number calculated via the Laviron equation was approximately two, suggesting a transition from Ta(V) to Ta(III). Furthermore, the reduction peak potential shifted nonlinearly toward more positive values with increasing temperature, implying dynamic changes in tantalum ion speciation within the electrolyte. These insights provide a valuable foundation for designing low-temperature electrodeposition processes in EMIC-based ionic liquid systems. KCI Citation Count: 0