Solution-Processed CoFe2O4 Nanoparticles on 3D Carbon Fiber Papers for Durable Oxygen Evolution Reaction

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• 作者：Alireza Kargar ; Serdar Yavuz ; Tae Kyoung Kim ; Chin-Hung Liu ; Cihan Kuru ; Cyrus S. Rustomji ; Sungho Jin ; Prabhakar R. Bandaru
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：August 19, 2015
• 年：2015
• 卷：7
• 期：32
• 页码：17851-17856
• 全文大小：427K
• ISSN：1944-8252

文摘

We report CoFe₂O₄ nanoparticles (NPs) synthesized using a facile hydrothermal growth and their attachment on 3D carbon fiber papers (CFPs) for efficient and durable oxygen evolution reaction (OER). The CFPs covered with CoFe₂O₄ NPs show orders of magnitude higher OER performance than bare CFP due to high activity of CoFe₂O₄ NPs, leading to a small overpotential of 378 mV to get a current density of 10 mA/cm². Significantly, the CoFe₂O₄ NPs-on-CFP electrodes exhibit remarkably long stability evaluated by continuous cycling (over 15 h) and operation with a high current density at a fixed potential (over 40 h) without any morphological change and with preservation of all materials within the electrode. Furthermore, the CoFe₂O₄ NPs-on-CFP electrodes also exhibit hydrogen evolution reaction (HER) performance, which is considerably higher than that of bare CFP, acting as a bifunctional electrocatalyst. The achieved results show promising potential for efficient, cost-effective, and durable hydrogen generation at large scales using earth-abundant materials and cheap fabrication processes.