Innovative Cobalt Phosphide-Doped Carbon Catalyst for Efficient Water Splitting
A new cobalt phosphide-doped porous carbon electrocatalyst (CoP/CoP/C) shows promise for hydrogen and oxygen evolution reactions, achieving a current density of 10 mA/cm². This development addresses the challenges of high overpotentials associated with water splitting, enhancing efficiency in hydrogen production.
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The cobalt phosphide-doped porous carbon electrocatalyst (CoP/CoP/C) was synthesized through pyrolysis of a composite precursor, which consists of cobalt/zinc phosphate (Co/Zn-PO) layered with a Co-based metal-organic framework. This method eliminates the use of traditional phosphorus sources that produce toxic gases.
The catalyst exhibits a significant performance, achieving a low overpotential of 204 mV for hydrogen evolution reaction (HER) and 339 mV for oxygen evolution reaction (OER) with a current density of 10 mA/cm². The role of nickel in the composite was crucial for coordination and modulation of the CoP ratio. The carbonization temperature was also vital for the conversion efficiency of the catalyst.
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