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

Single-atom catalysts provide an effective approach to reduce the amount of precious metals meanwhile maintain their catalytic activity. However, the sluggish activity of the catalysts for alkaline water dissociation has hampered advances in highly efficient hydrogen production. Herein, we develop a...

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Bibliographic Details
Published in:	Nature communications 2021-06, Vol.12 (1), p.3783-3783, Article 3783
Main Authors:	Zhou, Kai Ling, Wang, Zelin, Han, Chang Bao, Ke, Xiaoxing, Wang, Changhao, Jin, Yuhong, Zhang, Qianqian, Liu, Jingbing, Wang, Hao, Yan, Hui
Format:	Article
Language:	eng
Subjects:	Alkaline water Catalysts Catalytic activity Electrocatalysts Energy of dissociation Energy sources Evolution Free energy Heat of formation Heavy metals Heterostructures Hydrogen Hydrogen evolution Hydrogen production Hydroxyl ions Metal oxides Morphology Nanotechnology Nanowires Nickel Nickel oxides Platinum Renewable energy Transition metals
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Summary:	Single-atom catalysts provide an effective approach to reduce the amount of precious metals meanwhile maintain their catalytic activity. However, the sluggish activity of the catalysts for alkaline water dissociation has hampered advances in highly efficient hydrogen production. Herein, we develop a single-atom platinum immobilized NiO/Ni heterostructure (Pt -NiO/Ni) as an alkaline hydrogen evolution catalyst. 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. A further enhancement is achieved by constructing Pt -NiO/Ni nanosheets on Ag nanowires to form a hierarchical three-dimensional morphology. Consequently, the fabricated Pt -NiO/Ni catalyst displays high alkaline hydrogen evolution performances with a quite high mass activity of 20.6 A mg for Pt at the overpotential of 100 mV, significantly outperforming the reported catalysts.
ISSN:	2041-1723 2041-1723