Highly efficient and durable phosphine reduced iron-doped tungsten oxide/reduced graphene oxide nanocomposites for the hydrogen evolution reaction. (29th March 2018)

• Record Type: Journal Article
• Authors: Wondimu, Tadele Hunde; Chen, Guan-Cheng; Kabtamu, Daniel Manaye; Chen, Hsueh-Yu; Bayeh, Anteneh Wodaje; Huang, Hsin-Chih; Wang, Chen Hao
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 13(2018)
• Page Start: 6481
• Page End: 6490
• Publication Date: 2018-03-29
• Subjects: Hydrogen evolution reaction -- Tungsten oxide -- Reduced graphene oxide -- Iron-doped; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.02.080
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The design and development of inexpensive and highly efficient electrocatalysts for hydrogen production from water splitting are highly crucial for green energy and the hydrogen economy. Herein, we report phosphine reduced an iron-doped tungsten oxide nanoplate/reduced graphene oxide nanocomposite (Fe-WOxP/rGO) as an excellent electrocatalyst for the hydrogen evolution reaction. This electrocatalyst was synthesized using a hydrothermal method, followed by reduction with phosphine (PH3 ), which was generated from sodium hypophosphite. The catalyst onset potential, Tafel slope, and stability were investigated. Accordingly, Fe-WOxP/rGO exhibited impressively high electrocatalytic activity with a low overpotential of 54.60 mV, which is required to achieve a current density of 10 mAcm −2 . The Tafel slope of 41.99 mV dec −1 and the linear sweep voltammetry curve is almost the same as 2000 cycles and electrolysis under static overpotential (54.60 mV) is remain for more than 24 h in 0.5 M H2 SO4 . The catalytic activity and conductivity of Fe-WOxP/rGO were higher than WOX P, Fe-WOxP and WOxP/rGO. Such an outstanding performance of the Fe-WOxP/rGO nanocomposite is attributed to the coupled synergic effect between high oxygen vacancies formation on tungsten oxide in the nanoplate-like structure of Fe-WOxP and rGO nanosheet, making it as an excellent electrocatalyst for hydrogen evolution reaction. Graphical abstract: Highlights: Fe-WOX P/rGO was synthesized by hydrothermal followed by CVD method. Electrocatalytic activity of Fe-WOX P/rGO for HER was studied. Coupled synergistic effect of Fe-WOX P and rGO support enhances the performance. Fe-WOX P/rGO attains lower overpotential of 54.60 mV for 10 mA cm −2 and 41.99 mV dec −1 . Fe-WOX P/rGO was stable at 0.5 M H2 SO4 at 10 mA cm −2 for more than 24 h.