碱性介质中硼掺杂的α-Ni(OH)_2电催化氧化尿素（英文）

Boron-doped α-Ni(OH)_2 for electro-catalytic oxidation of ureain in alkaline medium

以P123（EO20PO70EO20）为模板剂,NaBH4为碱及硼源,采用液相法合成了硼掺杂的α-Ni（OH）2纳米花.该纳米花平均尺寸在200~500nm之间,呈多孔状.研究结果表明,该B-α-Ni（OH）2电极具有良好的电催化作用,活性高,稳定性好,在电极上对尿酸的氧化动力学过程为扩散控制过程.与Ni（OH）2相比,其在碱性介质中电催化氧化尿素的电流密度提高了10倍以上.B-α-Ni（OH）2纳米花在富含尿素的废水处理、制氢和燃料电池上具有潜在的应用前景.

Boron-dopedα-Ni（OH）2nanoflowers（B-α-Ni（OH）2）were synthesized by a liquidphase method using P123（EO20PO70EO20）as a template and NaBH4 as alkali and boron sources.The average size of these B-α-Ni（OH）2nanoflowers is in a range of 200-500 nm with many porous.The B-α-Ni（OH）2nanoflowers were developed as electrocatalysts for urea electro-oxidation in alkaline media with more than 10 times enhancement in current density compared to bulk nickel hydroxide powders.Results demonstrated that the obtained B-α-Ni（OH）2electrode exhibited high activity and good stability.The positive correlation between the scan rates and the anodic currents implied a single diffusion-controlled kinetic process.The enhanced electro-catalytic oxidation of urea using B-α-Ni（OH）2 nanoflowers has promising applications in urea-rich wastewater remediation,hydrogen production,and fuel cells.