121st General Meeting of the KCS

Type Poster Presentation
Area Analytical Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code ANAL.P-261
Subject Study on the Electrocatalytic amplification of Single Silver Nanoparticle Collided on Copper Ultramicroelectrode in Alkaline Solution
Authors ki jun kim, Seong Jung Kwon*
Department of Chemistry, Konkuk University, Korea
Abstract Silver nanoparticle (Ag NP)’s electrochemical characteristic for hydrazine oxidation is analyzed by transient current change of a single Ag NP collided on ultramicroelectrode(UME). When a copper (Cu) whose electrochemical activity for hydrazine oxidation is worse than Ag is used as UME, increased staircase signal was observed instead of the decreased signal of the normally blocking strategy. And the collided Ag NP was stabilized for the self-oxidation by alkaline electrolyte solution. The collisional signal of Ag NP didn’t be observed when -0.2 V ~ 0.4 V was applied to the UME even the potential is enough for the electrocatalytic hydrazine oxidation by Ag UME. But when 0.5 V to 0.7 V was applied to the Cu UME, depending on applied potential, blip or staircase shaped signal was observed by the Ag NP’s collision on Cu UME. The different mechanism of hydrazine oxidation based on the various oxidation states of Ag were suggested depending on the transient current changing shapes. Through the analysis of current changing shape, proper experiment condition was identified when using Ag NP for electrocatalyst for hydrazine oxidation.
E-mail kim573252@naver.com