Cu2O–Cu Hybrid Foams as High-Performance Electrocatalysts for Oxygen Evolution Reaction in Alkaline Media

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• 作者：Han Xu ; Jin-Xian Feng ; Ye-Xiang Tong ; Gao-Ren Li
• 刊名：ACS Catalysis
• 出版年：2017
• 出版时间：February 3, 2017
• 年：2017
• 卷：7
• 期：2
• 页码：986-991
• 全文大小：498K
• ISSN：2155-5435

文摘

Here 3D Cu₂O–Cu hybrid foams are developed as high-performance electrocatalysts for OER in alkaline solution. The hybrid foams are composed of Cu₂O–Cu dendrites with high surface area and high-speed electronic transmission networks, and they can provide fast transportation and short diffusion path for electrolyte and evolved O₂ bubbles. As the special surface and structure effects, the Cu₂O–Cu hybrid foams exhibit low onset overpotential of ∼250 mV, small Tafel slope of 67.52 mV dec^–1, and high durability over 50 h at a current density of 10 mA cm^–2 for OER in alkaline solution. The results of this study may be particularly beneficial for the development of a type of hybrid porous foam electrocatalysts for the electrochemical process in which at least one gas-phase is involved, such as H₂ or O₂ evolution reaction and O₂ or CO₂ electroreduction reaction.