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Zinc ion induced three-dimensional Co9S8 nano-neuron network for efficient hydrogen evolution
یون روی باعث ایجاد سه بعدی شبکه نانو سلول های عصبی Co9S8 Co9S8 برای تکامل هیدروژن کارآمد می شود-2020 As the cost-effective and nontoxic alternative for hydrogen evolution reaction (HER), Co9S8 has attracted
much attention. This paper explores the regulation of Zn doping impacted the unique nanostructure and
electrocatalytic performance on Co9S8. Herein, utilizing copper foam (CF) as substrate, a series of
different nanostructure of (Zn-)Co9S8@CF has been synthesized by accurately varying the ratio of Zn2þ to
Co2þ. Compared with aggregated pure Co9S8 and other different ratios contrast samples, ZneCo9S8@CF-
(1-1) with a zinc to cobalt ratio of 1 possesses highly dispersity which can be attributed to the novel
nano-neuron network structure. The electrochemical measurements for HER demonstrate that Zn
eCo9S8@CF-(1-1) not only reveals superior activity with small overpotentials to achieve a current density
of 10 mA cm2 in acidic (278 mV) and alkaline (273 mV) media, but also exhibits long-time durability in
the solution with a wide range of pH. The excellent performance of ZneCo9S8@CF-(1-1) can be attributed
to the unique reticular structure which can facilitate exposure of numerous active sites and favorable
long-term stability. The substrate of three-dimensional CF can provide the remarkable conductivity. This
work provides a precise and effective approach to regulate three-dimensional nanostructure of Zn-doped
electrocatalysts for HER. Keywords: Zn-doping | Co9S8 | Nano-neuron network | Hydrogen evolution reaction | Electrocatalyst |
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