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129th General Meeting of Korean Chemical Society & Exposition Study on Gradually Oxidizing Phenomena of Single Nickel nanoparticle for Urea Oxidation by Electrocatalytic Amplification Method

Submission Date :
2 / 28 / 2022 , 16 : 43 : 31
Abstract Number :
Presenting Type:
Poster Presentation
Presenting Area :
Authors :
Ki jun Kim, Seong Jung Kwon*, Seungyoung Park
Department of Chemistry, Konkuk University, Korea
Assigned Code :
ELEC.P-716 Assigend Code Guideline
Presenting Time :
April 15 (FRI) 11:00~13:00
Nickel (Ni) showed electrocatalytic character for urea oxidation when Ni is oxidized. Electrocatalytic amplification method was used to investigate single Ni nanoparticle (NP)’s electrochemical behavior about urea oxidation. Platinum (Pt) is not good catalyst for urea oxidation, so Pt is appropriate for working electrode. According to Cyclicvoltammetry (CV) results, oxidized Ni showed catalytic current at 0.4 V region. So Ni nanoparticle (NP) collided on Pt electrode surface applied 0.4 V, the transient current signals were showed depending on Ni NP’s oxidation states. To control Ni NP’s oxidation state, Ni NP stock solution was bubbled with Oxygen. At first Ni NP didn’t showed current signal. But as time goes by, the surface of the nickel was oxidized so transient current signals were showed. This amplified signal was observed as staircase signal. The signal's peak height and frequency increase over time after oxygen exposing to Ni NP solution. Through this results, we detected Ni NP's gradually oxidizng affect on urea oxidation via electrocatalytic amplification method.