Hierarchical porous carbon supported CoP derived from CoZn-MOF and its hydrogen evolution properties
Under the background of"double carbon",efficient and clean hydrogen energy has become an important alternative to traditional fossil energy,and electrolysis of water to produce hydrogen is a key technology to be conquered.At present,the catalysts with high catalytic activity for efficient hydrogen evolution are mainly precious metals.However,the high cost and scarcity of precious metals seriously hinder their large-scale application in clean energy technology.Therefore,the development of efficient,durable,cheap and earth-rich electrocatalysts is of good importance to realize these technologies.In this work,a novel ZnCo-MOF with unique polyhedral morphology was synthesized by using ZnCo-MOF-74 NPs as precursor under the treatment of acid solution.Then,CoP-doped hierarchical porous carbon with regular morphology(H-CoP/C)was obtained through a stepwise calcination and phosphorylation process.The results showed that hierarchical porous carbon as a carrier could not only support more active sites,but also facilitate the exposure of active sites,the conductivity of materials and the mass transfer in the catalytic process.With favorable structural characteristics and sufficient active sites,the obtained electrocatalyst H-CoP/C had excellent HER performance in alkaline media.Only 168mV overpotential was required to drive the current density of 10mA/cm2,which was superior to most non-precious metal electrocatalysts.
electrolysis of waterhydrogen evolution reactionCoPmetal-organic frameworkhierarchical porous carbon
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