[논문]중공 ZIF를 이용한 RuO2/h-Co3O4 촉매의 합성 및 산소 발생 반응으로의 활용

구윤모; 이영빈; 임경민; 김진수

doi:10.14478/ace.2023.1017

중공 ZIF를 이용한 RuO2/h-Co3O4 촉매의 합성 및 산소 발생 반응으로의 활용
Synthesis of RuO2/h-Co3O4 Electrocatalysts Derived from Hollow ZIF and Their Applications for Oxygen Evolution Reaction 원문보기

공업화학 = Applied chemistry for engineering, v.34 no.2, 2023년, pp.180 - 185

구윤모 (경희대학교 화학공학과) , 이영빈 (경희대학교 화학공학과) , 임경민 (경희대학교 화학공학과) , 김진수 (경희대학교 화학공학과)

초록
AI-Helper

물의 전기 분해 효율을 향상시키기 위해 산소발생반응(OER)의 반응 속도를 가속화하며 고성능과 장기 안정성을 가진 OER 전기촉매 개발이 필수적이다. 본 연구에서는 고효율의 OER 전기촉매를 합성하기 위해 중공 금속-유기골격체 (MOF)로부터 유도된 루테늄-코발트 산화물 촉매를 개발하였다. 합성된 촉매는 루테늄의 표면 노출을 증대시킴으로 낮은 Tafel 기울기와 10 mA/cm²의 전류밀도에서 386 mV의 낮은 과전위가 관찰되었다. 또한 상용 RuO₂ 촉매 대비 높은 질량 활성과 안정성을 보여, 귀금속 촉매를 대체할 수 있을 것으로 기대된다.

Abstract ▼ AI-Helper

To improve the efficiency of water electrolysis, it is essential to develop an oxygen evolution reaction (OER) electrocatalyst with high performance and long-term stability, accelerating the reaction rate of OER. In this study, a hollow metal-organic framework (MOF)-derived ruthenium-cobalt oxide catalyst was developed to synthesize an efficient OER electrocatalyst. As the synthesized catalyst increases the surface exposure of ruthenium, a low overpotential (386 mV) was observed at a current density of 10 mA/cm2 with a low Tafel slope. It is expected to be able to replace noble metal catalysts by showing higher mass activity and stability than commercial RuO2 catalysts.

주제어

표/그림 (8)

그림 Figure 1. Schematic illustration of RuO2/h-Co3O4 nano particles.
그림 Figure 2. FE-SEM images of (a) ZIF-67, (b) hollow ZIF, (c) h-Co-NC, and (d) RuO₂/h-Co₃O₄.
그림 Figure 3. (a) XRD patterns and (b) Raman spectra of RuO₂/h-Co₃O₄ at different temperatures.
그림 Figure 4. N₂ isotherms and pore distributions of RuO₂/h-Co₃O₄ and RuO₂/Co₃O₄.
그림 Figure 5. (a) OER-LSV curves and tafel plots (inset figure) of RuO₂/h-Co₃O₄, RuO₂/Co₃O₄, commercial RuO₂ and h-Co3O4 in 1M KOH. (b) OER-LSV curves of RuO₂/h-Co₃O₄ at different annealing temperature. (c) OER-LSV curves of RuO₂/h-Co₃O₄ after 10,000 cycling test. (d) Mass activity of RuO₂/h-Co₃O₄, RuO₂/Co₃O₄ and commercial RuO₂ at 1.6 V.
표 Table 1. BET surface area and pore volume of RuO₂/h-Co₃O₄ and RuO₂/Co₃O₄
표 Table 2. Elemental analysis of RuO₂/h-Co₃O₄ and RuO₂/Co₃O₄
표 Table 3. Overpotential and mass activity of RuO₂/h-Co₃O₄, RuO2/Co3O4 and commercial RuO₂

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