Catalytic hydrogen production via NaBH4 hydrolysis: Role of WO3 nanopellets

Shobharajsinh Rathod, Devanshu Gajjar, Kinjal K. Joshi, Pratik Pataniya, C.K. Sumesh and Sanni Kapatel

Renewable Energy, 2025, vol. 248, issue C

Abstract: Hydrogen is a promising alternative energy source due to its high energy capacity and emission-free characteristics, fulfilling the future energy needs from non-fossil sources. This study demonstrates a rapid, in situ, and cost-effective method for hydrogen production through the hydrolysis of sodium borohydride (NaBH4) supported by tungsten trioxide (WO3) nanopellets (NPs) synthesized via microwave-assisted co-precipitation method. The WO3 NPs exhibit excellent catalytic activity, achieving a hydrogen generation rate (HGR) of 339.1 mL min−1 g−1 at 25 °C, surged to 485.8 mL min−1 g−1 at increasing NaBH4 solution. At an optimal pH of 8, an HGR of 340.8 mL min−1 g−1 is achieved, and the lowest activation energy of 27.8 kJ mol−1 allows efficient catalysis, reaching an HGR of 935.4 mL min−1 g−1 at 70 °C. The stability of the catalyst was tested for over five cycles and a step reaction was also introduced to control the H2 production. These results highlight the potential of WO3 NPs as a robust and economical catalyst for sustainable hydrogen production, offering significant advantages in scalability and efficiency for clean energy applications.

Keywords: Hydrogen generation; Sodium borohydride hydrolysis (NaBH4) hydrolysis; WO3 NPs; Sustainable energy applications; And activation energy (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:248:y:2025:i:c:s0960148125008183

DOI: 10.1016/j.renene.2025.123156

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