石墨烯
析氧
材料科学
氧气
化学工程
氧还原反应
纳米技术
化学
电化学
电极
工程类
物理化学
有机化学
作者
Qianyu Wang,Zi-Ye Liu,Ji‐Ming Hu
标识
DOI:10.1016/j.jpowsour.2024.234219
摘要
With the increasing demand for renewable and clean energy, highly efficient and low-cost electrocatalysts for oxygen evolution reaction (OER) have attracted great interest in the field of hydrogen energy. In this work, we report a novel strategy to prepare graphene (Gr, rather than graphene oxide)-supported highly efficient catalyst for OER. Gr-supported Co3O4 free-standing nanosheets (Gr@eCo3O4) are fabricated by electrodeposition. SiO2 is used as a template for co-electrodeposition, and is further etched by alkali. Gr provides large electrochemical surface area and abundant catalytically active sites, as well as enhances the conductivity of Co3O4. Meanwhile, the charge transfer kinetics of OER is improved on Co3O4 electrodeposited on Gr. Gr@eCo3O4 exhibits superior OER performance with a Tafel slope of 45 mV dec−1 at 10 mA cm−2.
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