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VOL. 8, ISSUE 2 (2024)
Exploring transition metal catalysts for hydrogen evolution: Advancements in electrochemical efficiency and stability
Authors
Dr. Randhir Kumar
Abstract
Hydrogen (H₂) is
considered a promising clean energy carrier due to its high energy density and
zero-emission combustion products. However, the sustainable production and
efficient storage of hydrogen present significant challenges. This paper
investigates the role of inorganic compounds in overcoming these challenges, with
a specific focus on transition-metal catalysts, metal hydrides, and chemical
hydrides for hydrogen production and storage. The methodology involves
experimental analysis using water electrolysis for hydrogen production, where
various transition metal-based catalysts (Ni, Co, Fe) were tested for hydrogen
evolution efficiency, and metal hydrides (MgH₂, NaAlH₄) and chemical hydrides
(NaBH₄, NH₃BH₃) were examined for hydrogen storage capacity, desorption
temperature, and reversibility. The experimental results show that Ni-based
catalysts exhibited the highest hydrogen production rate (0.55 m³/kg·hr) with
the lowest overpotential (0.09 V), making them the most efficient for hydrogen
production. For hydrogen storage, MgH₂ exhibited the highest storage capacity
(6.4 wt%) but required a high desorption temperature (400°C). At the same time,
NaBH₄ and NH₃BH₃ exhibited good storage capacities (5.5 wt% and 6.0 wt%,
respectively) with lower desorption temperatures (200°C and 180°C) and higher
reversibility (15 and 18 cycles, respectively). The results highlight the
strengths and limitations of each material for hydrogen production and storage,
underscoring the need for further optimisation of material design to enable
scalable, sustainable hydrogen systems.
Pages:97-102
How to cite this article:
Dr. Randhir Kumar "Exploring transition metal catalysts for hydrogen evolution: Advancements in electrochemical efficiency and stability". International Journal of Chemistry Studies, Vol 8, Issue 2, 2024, Pages 97-102
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