CoP/Co_2P/C纳米材料用于全pH值电催化析氢

在氮气下一步退火含有植酸和钴的前驱体,合成了一种新型的CoP/Co2P/C复合纳米材料作为电催化剂,该催化剂在全pH值范围下表现出优异的电催化析氢活性和稳定性.在0.5mol/L的硫酸中,电流密度为10mA/cm~2时,过电位为135mV.在1mol/L KOH溶液中,CoP/Co_2P/C催化剂需要141 mV的过电位才能使电流密度达到10 mA/cm~2,在0.1mol/L磷酸盐缓冲溶液中,需要155mV的过电位才能使电流密度达到10mA/cm~2.这种优异的析氢活性主要归因于CoP/Co_2P纳米粒子和C层之间的协同作用.

CoP/Co2P/C composite as efficient electrocatalyst for hydrogen evolution reactions over the whole pH range

Hydrogen evolution reaction (HER) based on water electrolysis is promising pathways for sustainable hydrogen production,in which an important task is developing with the advontageous of low cost,high active and stable electrocatalysts.Herein,we report a CoP/Co2P/C electrocatalyst as an efficient and stable HER electrocatalyst over the whole pH range (from 0 to 14),which has been prepared by one-step annealing the precursors containing phytic acid and cobalt salts.Such catalyst requires an overpotential of 135 mV to achieve a current density of 10 mA/cm2 in 0.5 mol/L H2SO4.In 1 mol/L KOH and 0.1 mol/L PBS,it needs 141 and 155 mV to attain the current density of 10 mA/cm2,respectively.The excellent HER performance of CoP/Co2P/C could be attributed to the synergistic effect between CoP/Co2P and graphene-like carbon.