Mandal, Pritam and Rana, Utkarsh and Sarkar, Probir Kumar and Sinhamahapatra, Apurba (2026) Rate enhancement of NaBH4 hydrolysis using light over graphitic carbon nitride-based catalyst. International Journal of Hydrogen Energy (155193).

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Abstract

The catalytic hydrolysis of sodium borohydride (NaBH4) is a promising approach for on-demand hydrogen production. In this study, a bimetallic Ni–Co catalyst supported on graphitic carbon nitride (GCN) is synthesized in situ and evaluated for NaBH4 hydrolysis. Spectroscopic and structural analyses confirmed the uniform atomic dispersion of Ni–Co species on GCN, stabilized by M–Nx coordination. The optimal catalyst, containing 3 wt% Ni/Co with a ratio of 2:1, exhibited a hydrogen generation rate of 227.9 mmol g−1 h−1, which is significantly higher than those of 3 wt% Ni–GCN and 3 wt% Co–GCN. The catalytic activity increased with temperature, and the apparent activation energy for NaBH4 hydrolysis is 14.35 kJ mol−1. The enhanced charge separation and improved light absorption make Ni–Co–GCN the most efficient photocatalyst among the studied samples. Under visible-light illumination, the hydrogen generation rate increased substantially to 361.8 mmol g−1 h−1, demonstrating the combined effects of photocatalytic activity and bimetallic alloying.

Item Type:	Article
Uncontrolled Keywords:	Sodium borohydride Hydrogen generation Ni–Co bimetallic catalyst Graphitic carbon nitride Photocatalysis
Subjects:	Coal Characterisation
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	29 Apr 2026 06:14
Last Modified:	29 Apr 2026 06:14
URI:	https://cimfr.csircentral.net/id/eprint/2991

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