Cobalt Nickel Boride Nanocomposite as High-Performance Anode Catalyst for Direct Borohydride Fuel Cell

Yu-e Duan, Sai Li*, Qiang Tan*, Yuanzhen Chen, Kunyang Zou, Xin Dai, Maryam Bayati, Ben Bin Xu, Laurent Dala, Terence Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Similar to MXene, MAB is a group of 2D ceramic/metallic boride materials which exhibits unique properties for various applications. However, these 2D sheets tend to stack and therefore lose their active surface area and functions. Herein, an amorphous cobalt nickel boride (Co–Ni–B) nanocomposite is prepared with a combination of 2D sheets and nanoparticles in the center to avoid agglomeration. This unique structure holds the 2D nano-sheets with massive surface area which contains numerous catalytic active sites. This nanocomposite is prepared as an electrocatalyst for borohydride electrooxidation reaction (BOR). It shows outstanding catalytic activity through improving the kinetic parameters of BH4− oxidation, owing to abundant ultrathin 2D structure on the surface, which provide free interspace and electroactive sites for charge/mass transport. The anode catalyst led to a 209 mW/cm2 maximum power density with high open circuit potential of 1.06 V at room temperature in a miniature direct borohydride fuel cell (DBFC). It also showed a great longevity of up to 45 h at an output power density of 64 mW/cm2, which is higher than the Co–B, Ni–B and PtRu/C. The cost reduction and prospective scale-up production of the Co–Ni–B catalyst are also addressed.
Original languageEnglish
Pages (from-to)15471-15481
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume46
Issue number29
Early online date9 Mar 2021
DOIs
Publication statusPublished - 26 Apr 2021

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