Pt/Fe-NF electrode with high double-layer capacitance for efficient hydrogen evolution reaction in alkaline media. (13th April 2017)

• Record Type: Journal Article
• Authors: Huang, Lirong; Hou, Yanping; Yu, Zebin; Peng, Zhenbo; Wang, Li; Huang, Jun; Zhang, Boge; Qian, Lun; Wu, Leidan; Li, Zongchen
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 15(2017)
• Page Start: 9458
• Page End: 9466
• Publication Date: 2017-04-13
• Subjects: Pt particles -- Electrocatalytic activity -- Double-layer capacitance -- Hydrogen evolution reaction -- Alkaline media; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.02.055
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The electrode with high catalytic activity, low hydrogen overpotential and low cost is desired for hydrogen evolution reaction (HER) via electrocatalytic water splitting. In this study, Pt/Fe-Ni foam (Pt/Fe-NF) electrode was synthesized via cathodic electrodeposition followed by impregnation deposition. Physical and electrochemical properties of Pt/Fe-NF, NF and Pt/NF electrodes were characterized by various techniques. The Pt/Fe-NF electrode exhibited better electrochemical activity for HER under alkaline condition than those of Pt/NF and NF electrodes, owing to the introduction of zero valences Pt and Fe onto the NF, and synergetic effect resulted from the formation of Fe-Ni alloy. Furthermore, Pt/Fe-NF electrode showed extremely high double-layer capacitance (69.1 mFcm −2 ), suggesting high active sites for the Pt/Fe-NF. Tafel slope of Pt/Fe-NF was 59.9 mV dec −1, indicating that the Volmer-Heyrovsky HER mechanism was the rate-limiting step. The Pt/Fe-NF electrode with great electrocatalytic activity is a promising electro-catalyst for industrial hydrogen production from alkaline electrolyte. Graphical abstract: Image 1 Highlights: Pt/Fe-NF electrode exhibited high electrochemical activity for HER in alkaline media. The synergistic effect of Pt, Fe and Ni resulted in high catalytic activity. A small Tafel slope of 59.9 mV per decade was observed for HER of Pt/Fe-NF. Pt/Fe-NF electrode showed high double-layer capacitance about 69.1 mF cm −2 . The addition of Fe is beneficial to the Pt loading on NF electrode.