본 연구에서는 다양한 분야에서 광범위하게 사용할 수 있는 저가의 일회용 전기화학센서 개발을 위해 샤프심 전

극(PGE)을 기반으로 2종의 금속 산화물 CuO와 NiO 나노구조체를 도입하여 PGE/CuO/NiO 전극을 제작하고, 비

효소적 H2O2 검출용 전기화학센서에 적용하였다. PGE/CuO/NiO 전극은 PGE의 전처리 공정과 CuO 및 NiO 나노

구조체의 전기화학적 합성 공정을 통해 제작되었으며, 시간대전류법(CA)과 순환전압 전류법(CV), 전기화학 임피던

스(EIS) 분석법을 이용하여 분석되었다. PGE 전극에 2종의 금속 산화물의 접목은 전극과 산화-환원 화학종 간의

직접적이고 효율적인 전자전달과 전극의 전도도 및 유효면적 증가 등 전기화학적 특성 향상을 가져왔다. 이는 NiO

와 CuO의 접목을 통해 NiO에서의 Ni3+ 이온 생성 증가와 함께 전하 캐리어 농도 증가에 기인한 것으로, 결과적으

로 NiO NPs와 CuO NPs의 시너지 효과 덕분에 전기화학적 센싱 성능도 향상되었다. 본 연구의 결과를 기반으로

다양한 나노구조체 도입 및 표면 개질을 통해 저가의 고성능 일회용 전극 소재 및 센서 개발에 응용될 수 있을 것

으로 기대된다.

We developed the PGE/CuO/NiO electrode as low-cost, disposable electrode material and it was applied to

non-enzymatic electrochemical sensor for H2O2 detection. The PGE/CuO/NiO electrode was based on pencil lead

using CuO and NiO nanostructures. This electrode was fabricated through the pretreatment processes of PGE and

electrochemical deposition of CuO and NiO nanostructures. And it was analyzed using chronoamperometry (CA), cyclic

voltammetry (CV), and electrochemical impedance spectroscopy (EIS) techniques. The integration of two metal oxides

onto the PGE electrode improved its electrochemical properties, including direct and efficient electron transfer between

the electrode and redox species, as well as enhanced conductivity and effective surface area of the electrode. It is attributed to

the increased generation of Ni3+ in NiO and the resulting increase in charge carrier concentration through the integration

of NiO and CuO. As a result, its electrochemical sensing performance was enhanced due to the synergistic effect of NiO

NPs and CuO NPs. Based on the results of this study, it is expected that it can be applied to the development of low-cost,

high-performance disposable electrode materials and electrochemical sensors through the introduction of various

nanomaterials and surface modification.

Pencil graphite electrode, Copper oxide, Nickel oxide, Non-enzymatic sensor, Hydrogen peroxide

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