Platinum single-atom catalyst coupled with transition metal/metal oxide heterostructure for accelerating alkaline hydrogen evolution reaction

Abstract Single-atom catalysts provide an effective approach to reduce the amount of precious metals meanwhile maintain their catalytic activity. A further enhancement is achieved by constructing Pt SA -NiO/Ni nanosheets on Ag nanowires to form a hierarchical three-dimensional morphology.

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• 1 However, the sluggish activity of the catalysts for alkaline water dissociation has hampered advances in highly efficient hydrogen production.
• 2 Herein, we develop a single-atom platinum immobilized NiO/Ni heterostructure (Pt SA -NiO/Ni) as an alkaline hydrogen evolution catalyst.
• 3 It is found that Pt single atom coupled with NiO/Ni heterostructure enables the tunable binding abilities of hydroxyl ions (OH*) and hydrogen (H*), which efficiently tailors the water dissociation energy and promotes the H* conversion for accelerating alkaline hydrogen evolution reaction.

These innovations can translate to real-world improvements in technology, infrastructure, and everyday tools.

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