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Trace Cobalt Doping and Defect Engineering of High Surface Area α-Ni(OH)2 for Electrocatalytic Urea oxidation

能源与环境材料（英文） 2024年第2期7卷 111-118页

作者： Yi Liu Zhihui Yang Yuqin Zou Shuangyin Wang Junying He School of Metallurgy and Environment Central South UniversityChangsha 410083China State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

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

关键词： defect engineering electrocatalysis small molecule oxidation

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Trace Cobalt Doping and Defect Engineering of High Surface Area a-Ni（OH）2 for Electrocatalytic Urea oxidation

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Energy & Environmental Materials 2024年第2期7卷 115-122页

作者： Yi Liu Zhihui Yang Yuqin Zou Shuangyin Wang Junying He School of Metallurgy and Environment Central South University State Key Laboratory of Chem/Bio-Sensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University

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

关键词： defect engineering electrocatalysis small molecule oxidation

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