Electrochemical study of nickel-cobalt deposited on boron-doped diamond as working electrodes for urea fuel cells

摘要

Urea as one of the most abundant compounds that can be used as a fuel in fuel cells.It contains a nitrogen-hydrogen bond that can easily be broken by electrochemical processes to produce two molecules of hydrogen.The hydrogen released can generate electricity as in a fuel cell.In this research,boron-doped diamond(BDD)was modified using nickel and/or cobalt electrodeposition to provide Ni-Co-BDD,Ni-BDD,and Co-BDD working electrodes for enhanced urea electro-oxidation.The highest power density and potential was achieved using Ni-Co-BDD(96.4 mW cm~(-2)and 0.92 V,respectively),while the highest current density was achieved using Co-BDD(165.34 mA cm~(-1)).Overall,the results indicate that the best and most stable electrode for fuel cells is that based on Ni-Co-BDD.