p-아미노페놀 전기촉매 반응을 위한 인듐 주석 산화물과 덴드리머에 고정된 페로센의 전기접목
Electrografting of Dendrimer-Modified Ferrocene with Indium Tin Oxide for Electrocatalytic Reaction of p-aminophenol
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초록
본 연구에서는 페로세닐 덴드리머(ferrocenyl dendrimer, Fc-DEN)가 부분적으로 결합된 인듐 주석 산화물(ITO)을 이용하여 p-아미노페놀(AP)의 효율적인 산화-환원 반응을 개발하였다. Amineterminated polyamidoamine (PAMAM) 덴드리머는 말단 아민(amine) 그룹의 전기 산화적 접목을 통해 ITO 표면에 고정될 수 있으며, 전기화학적 측정을 통해 이를 확인하였다. 기존 ITO 표면과 비교했을 때, Fc-DEN로 변형된 ITO는 낮은 전위에서도 AP의 전기화학적 산화 전류가현저히 증가하였으며, 동시에 배경 산화 전류는 거의 나타나지 않았다. 이러한 결과는 전자 전달매개체로서 페로센(ferrocene)을 통한 촉매 활성이 크게 기여했음을 시사한다.
Abstract
In this work, we studied indium tin oxide (ITO) modified with partially tethered ferrocenyl dendrimer (Fc-DEN) to develop efficient p-aminophenol (AP) redox reaction. The amine-terminated polyamidoamine(PAMAM) dendrimers can be immobilized onto the ITO surfaces via the electro-oxidative grafting of the terminal amine groups. The electrochemical measurements confirmed the electrochemical immobilization of the amine-terminated dendrimers onto the ITO surfaces. Compared to conventional ITO surfaces, the Fc-DEN modified ITO showed highly enhanced electrochemical oxidation current of AP even at low potentials with no significant background oxidation current due to the catalytic activity of ferrocene as electron transfer mediator.
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