Article Synopsis
- The study addresses the challenges in maximizing the reactivity and stability of Pt catalysts for hydrogen evolution reactions (HER) by creating atomically flat Pt nanodendrites using a 2D synthesis technique.
- The research demonstrates how a well-designed heterointerface between Pt and NiFe-layered double hydroxide (LDH) improves catalytic performance by enhancing electronic interactions and binding strength.
- Findings show that this innovative approach results in a significant increase in Pt mass activity (about 11.2 times higher) and better long-term stability, emphasizing the role of Pt's shape and crystal facets in achieving effective hydrogen production.
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Article Abstract
Despite the Pt-catalyzed alkaline hydrogen evolution reaction (HER) progressing via oxophilic metal-hydroxide surface hybridization, maximizing Pt reactivity alongside operational stability is still unsatisfactory due to the lack of well-designed and optimized interface structures. Producing atomically flat two-dimensional Pt nanodendrites () through our 2D nanospace-confined synthesis strategy, this study tackles the insufficient interfacial contact effect during HER catalysis by realizing an area-maximized and firmly bound lateral heterointerface with NiFe-layered double hydroxide (LDH). The well-oriented {110} crystal surface exposure of Pt promotes electronic interplay that bestows strong LDH binding. The charge-relocated interfacial bond in accelerates the hydrogen generation steps and achieves nearly the highest reported Pt mass activity enhancement (∼11.2 times greater than 20 wt % Pt/C) and significantly improved long-term operational stability. This work uncovers the importance of the shape and facet of Pt to create heterointerfaces that provide catalytic synergy for efficient hydrogen production.
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