MOF derived cobalt-phospho-boride for rapid hydrogen generation via NaBH4 hydrolysis

Title

MOF derived cobalt-phospho-boride for rapid hydrogen generation via NaBH4 hydrolysis

Creator

Abraham A.; Silviya R.; Patel R.; Patel N.; Fernandes R.

Description

Developing effective transition metal catalysts that can replace precious metal-based catalysts for hydrogen generation from the hydrolysis of chemical hydride has attracted extensive interest. This study focuses on synthesizing cobalt phospho-boride (CoPB) within a metal-organic framework (MOF) framework using hydrothermal and chemical reduction methodologies. Incorporating boron and phosphorous into Co-MOF enhances the hydrogen generation rate, reaching 1.8 L/min/g and 3.6 L/min/g for CoB-MOF and CoPB-MOF, respectively, during NaBH4 hydrolysis. Along with the nanostructured morphology of MOF, the electron modulation around Co-sites due to the presence of P and B creates a synergic effect to produce this high H2 generation rate and very low activation energy of 20.7 kJ/mol. The kinetic studies on NaBH4 hydrolysis reaction revealed zero-order kinetics with respect to NaBH4 concentration for CoPB-MOF, where porous morphology renders facile movement of BH4? ions to the active sites. The heat treatment at 773 K in the N2 atmosphere did not show any significant fall in the activity of CoPB-MOF, thus showcasing its robust nature. Moreover, the present catalyst also displayed recycling behavior with no signs of deactivation. 2024 Hydrogen Energy Publications LLC

Source

International Journal of Hydrogen Energy, Vol-77, pp. 1245-1253.

Date

2024-01-01

Publisher

Elsevier Ltd

Subject

Hydrogen generation; Hydrolysis of NaBH₄; Metal-organic framework; Transition metal phospho-borides

Coverage

Abraham A., Department of Physics and Electronics, CHRIST University, Bengaluru, 560029, India; Silviya R., Department of Physics and Electronics, CHRIST University, Bengaluru, 560029, India; Patel R., Department of Physics and Electronics, CHRIST University, Bengaluru, 560029, India; Patel N., Department of Physics and Electronics, CHRIST University, Bengaluru, 560029, India; Fernandes R., Department of Physics and Electronics, CHRIST University, Bengaluru, 560029, India

Rights

Restricted Access

Relation

ISSN: 3603199; CODEN: IJHED

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1016/j.ijhydene.2024.06.247

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