Liang Ma , Zengyan Wei , Chen Zhao , Xiangyu Meng , Honglei Zhang , Meixiu Song , Yaming Wang , Baoqiang Li , Xiaoxiao Huang , Chengyan Xu , Ming Feng , Peigang He , Dechang Jia , Yu Zhou , Xiaoming Duan
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引用次数: 7
摘要
为了实现电化学水分解过程中快速产气，需要在高电流密度下运行商用析氧反应催化剂;然而，氧气气泡很容易覆盖电极的活性表面，阻碍反应动力学。本文介绍了一种简单、低成本、简单的大规模制备策略，用于合成具有三维网络结构的三金属(Fe, Co, Ni)尖晶石/碳/镍泡沫(FeCoNiOx/C/NF)电极，并证明了具有超亲水/超疏气性能的电极表面可以快速去除氧泡。所得FeCoNiOx/C/NF电极在1 M KOH下电流密度为10 mA cm−2时，过电位为221 mV，塔菲尔斜率极低，为21 mV dec−1。在500 mA cm−2的高电流密度下，FeCoNiOx/C/NF电极的过电位为325 mV，长期稳定性为250 h。
Hierarchical superhydrophilic/superaerophobic 3D porous trimetallic (Fe, Co, Ni) spinel/carbon/nickel foam for boosting oxygen evolution reaction
Commercial oxygen evolution reaction catalysts are required operation under high current density to achieve rapid gas generation during electrochemical water splitting; however, oxygen bubbles readily cover active surfaces of electrodes, impeding reaction kinetics. Here, we introduce a facile, low-cost, and easy large-scale preparation strategy to synthesize trimetallic (Fe, Co, Ni) spinel/carbon/nickel foam (FeCoNiOx/C/NF) electrodes with 3D network structures, and demonstrate that oxygen bubbles can be rapidly removed from the surface of electrodes with superhydrophilic/superaerophobic properties. The resulting FeCoNiOx/C/NF electrodes exhibit a low overpotential of 221 mV with extremely low Tafel slope of 21 mV dec−1 at a current density of 10 mA cm−2 in 1 M KOH. At a high current density of 500 mA cm−2, FeCoNiOx/C/NF electrodes show a low overpotential of 325 mV with long-term stability for 250 h.
期刊介绍：
Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including:
1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources.
2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes.
3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts.
4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells.
5.Catalytic reactions that convert wastes into useful products.
6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts.
7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems.
8.New catalytic combustion technologies and catalysts.
9.New catalytic non-enzymatic transformations of biomass components.
The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.
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