Modulated amorphous Fe–Ni–P nanosphere chains anchored on graphene aerogel grafted nickel foam: High-performance electrocatalyst for oxygen evolution reaction. (12th February 2023)

• Record Type: Journal Article
• Authors: Yang, Peilin; Wang, Lei; Xiong, Yi; Xiao, Feng; Wang, Yuan; Zhao, Maojie; Wang, Shuangshuang; Tang, Weishan; He, Ping; Jia, Bin
• Is Part Of: International journal of hydrogen energy. Volume 48:Number 13(2023)
• Page Start: 5042
• Page End: 5052
• Publication Date: 2023-02-12
• Subjects: Water splitting -- Oxygen evolution reaction -- Electrocatalyst -- Bimetal phosphide -- Graphene aerogel; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.11.084
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Substrate materials with large special surface area and high conductibility play a crucial role in preparing promising oxygen evolution reaction (OER) catalysts. Herein, binder-free Fe–Ni–P nanospheres anchored on graphene aerogel grafted nickel foam (FNP/GA@NF) are assembled with different molar ratios of Fe/Ni. GA@NF with prominent conductivity supplies ample accessible sites to amorphous Fe–Ni–P nanospheres to attach and offers a strong skeleton guaranteeing long-term stability during OER process. As revealed via spectroscopic measurement, tremella-like nanospheres arranged in a nanochain structure have been observed on the surface of GA@NF. Such a nanochain provides abundant paths for freely electronic transformation leading to faster kinetics. Besides, FNP/GA@NF possesses distinguished electrocatalytic activities in 1.0 M KOH solution. Especially, when the molar ratio is 3:2, FNP/GA@NF catalyst requires overpotentials of only 320 and 413 mV to arrive current density of 50 and 100 mA cm −2 . Furthermore, by the reason of robust framework, it shows superior durability even up to 24 h chronoamperometry test. This work opens an evolutive direction to construct binderless substrates to improve conductivity and catalytic activity of non-noble catalysts for OER. Graphical abstract: Binder-free Fe–Ni–P/GA@NF catalysts are prepared by anchoring Fe–Ni–P nanospheres on graphene aerogel grafted nickel foam (GA@NF), which not only offer abundant electron transport pathways, but also exhibit outstanding OER catalytic performance. Image 1 Highlights: Fe–Ni–P nanospheres growing on graphene aerogel grafted nickel foam (FNP/GA@NF). FNP/GA@NF is prepared by electroless deposition, after GA assembling on NF. Tremella-like Fe–Ni–P nanospheres arrange tightly and compose plentiful nanochains. FNP/GA@NF catalyst shows exceedingly low overpotential of 320 mV at 50 mA cm −2 . FNP/GA@NF catalyst with 3D network shows extremely stability during 24 h OER.