Trace Cobalt Doping and Defect Engineering of High Surface Area <scp>α‐Ni</scp>(<scp>OH</scp>)₂ for Electrocatalytic Urea Oxidation

Owing to the intrinsically sluggish kinetics of urea oxidation reaction (UOR) involving a six-electron transfer process, developing efficient UOR electrocatalyst is great challenge remained be overwhelmed. Herein, by taking advantage 2-Methylimidazole, which kind alkali in water and owns strong coordination ability Co2+ methanol, trace Co (1.0 mol%) addition was found induce defect engineering on α-Ni(OH)2 dual-solvent system methanol. Physical characterization results revealed that synthesized (WM-Ni0.99Co0.01(OH)2) defective nanosheet with thickness around 5–6 nm, attributing synergistic effect doping engineering, its electron structure finely altered, specific surface area tremendously enlarged from 68 172.3 m2 g−1. With all these merits, overpotential drive 10 mA cm−2 reduced 110 mV. Besides, interfacial behavior also well deciphered operando electrochemical impedance spectroscopy.