paper Direct photo-curing 3D printing of nickel-based electrocatalysts for highly-efficient hydrogen evolution
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作者
Han, Zhaojing; Wang, Gang; Zhang, Jie; Tang, Zhiyong
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刊物名称
NANO ENERGY
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年、卷、文献号
2022, 102, 2211-2855
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关键词
Han, Zhaojing; Wang, Gang; Zhang, Jie; Tang, Zhiyong
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摘要
It is of great significance to develop cost-effective electrocatalysts for efficient and durable hydrogen evolution reaction (HER) in alkaline media to meet the increasing demand of hydrogen. Here, we report a photo-curing 3D printing method for manufacturing directly the structured nickel-based electrocatalysts with unique gluten-like cubic structure and strong catalyst-substrate interaction. With incorporation of amorphous titanium, the tailored Ti-Ni NS electrode exhibits excellent durability, a Tafel slop of 74 mV dec(-1) of the HER, and a remarkable low overpotential of 34 mV at a current density of 10 mA cm(-2), surpassing the commercial Pt/C catalyst and most of the state-of-the-art electrocatalysts. Density functional theory calculations further confirm that the Ti doping decreases significantly the energy barriers in the Volmer and Heyrovsky steps, thus favoring the HER. This work opens a new window of precisely preparing the structured noble-metal-free catalysts with enhanced activity in alkaline water electrolysis (AWE).
