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

Duan, Yu-e, Li, Sai, Tan, Qiang, YuChen, Yuanzhen, Zou, Kunyang, Dai, Xin, Bayati, Maryam, Xu, Bin, Dala, Laurent and Liu, Xiaoteng (2021) Cobalt Nickel Boride Nanocomposite as High-Performance Anode Catalyst for Direct Borohydride Fuel Cell. International Journal of Hydrogen Energy, 46 (29). pp. 15471-15481. ISSN 0360-3199

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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.

Item Type: Article
Additional Information: Funding information: We gratefully acknowledge the financial support provided by the Natural Science Basic Research Program of Shaanxi, P. R. China (No.2018JQ2054) and the Engineering and Physical Sciences Research Council, United Kingdom (EP/S032886/1).
Uncontrolled Keywords: Direct borohydride fuel cell, Borohydride electrooxidation, Cobalt 44 Nickel Boride, Electrocatalyst
Subjects: F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 09 Feb 2021 11:17
Last Modified: 09 Mar 2022 03:30

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