Abstract: Using hydrothermal synthesis,cobalt-molybdenum oxide materials were uniformly loaded on the surface of carbon cloth,and the resulting materials were subjected to N and P chemistry to investigate the electrocatalytic hydrolysis performance of different composites and further investigate the effect of the introduction of different heteroatoms on the electrocatalytic performance of the materials.Meanwhile,CoMoOx was doped with Keggin-type polymetallic oxides(H3O40PW12·xH2O)to investigate the effect of the introduction of polymetallic oxygen clusters on the electrocatalytic performance of the composites.It was found that the P-doped nanocomposites exhibited excellent electrochemical activity,with an overpotential of 313 mV at a current density of 10 mA·cm-2 for the oxygen precipitation reaction and 197 mV at a current density of 10 mA·cm-2 for the hydrogen precipitation reaction.the excellent electrocatalytic performance was attributed to the introduction of P elements The excellent electrocatalytic performance was attributed to the introduction of P elements,which improved the electronic structure of the composites and promoted the adsorption of active intermediates on the active sites,thus facilitating the electrocatalytic hydrolysis process.This study explores the optimized conditions for the composites and provides an effective strategy for the modification of electrocatalysts.