摘要
以四水合钼酸铵、六水合硝酸钴和硫脲为原料,采用一步水热法在钛网(TM)上原位构筑了不同阵列结构Co_(9)S_(8)/MoS_(2)@TM催化电极。通过改变原料中钴、钼、硫的物质的量之比来调控Co_(9)S_(8)/MoS_(2)@TM电极的结构。采用SEM、XRD和XPS对Co_(9)S_(8)/MoS_(2)@TM进行物相分析和形貌表征,并在1 mol/L KOH电解液中对Co_(9)S_(8)/MoS_(2)@TM的电催化析氧性能进行了研究。结果表明,钴、钼、硫的物质的量之比为10∶14∶600时,制备的Co_(9)S_(8)/MoS_(2)@TM为3D花瓣状阵列结构,且在10 m A/cm^(2)电流密度下过电势为271 m V,塔菲尔斜率为88.5 m V/dec,具有良好的析氧稳定性和耐久性,展现了优异的电化学性能。
Co_(9)S_(8)/MoS_(2)@TM electrodes with different array structures were fabricated in situ on titanium mesh(TM)by one-step hydrothermal method using ammonium molybdate tetrahydrate,cobalt nitrate hexahydrate and thiourea as raw materials.The structure of Co_(9)S_(8)/MoS_(2)@TM was regulated by changing the molar ratio of cobalt,molybdenum and sulfur in the raw materials.The phase analysis and morphology characterization of Co_(9)S_(8)/MoS_(2)@TM were carried out by SEM,XRD and XPS.The electrocatalytic oxygen evolution performance of Co_(9)S_(8)/MoS_(2)@TM was evaluated in 1 mol/L KOH electrolyte.The results showed that Co_(9)S_(8)/MoS_(2)@TM with 3D flower-like structure was prepared when the molar ratio of cobalt,molybdenum and sulfur was 10∶14∶600.The overpotential was 271 m V at a current density of10 m A/cm^(2) and the Tafel slope was 88.5 m V/dec,exhibiting good oxygen evolution stability and durability and excellent electrochemical performance.
作者
卫学玲
包维维
蒋鹏
艾桃桃
李文虎
邹祥宇
WEI Xueling;BAO Weiwei;JIANG Peng;AI Taotao;LI Wenhu;ZOU Xiangyu(School of Material Science and Engineering,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2022年第1期164-170,211,共8页
Fine Chemicals
基金
国家自然科学基金青年科学基金项目(51504147)
陕西理工大学校级项目(SLGKY2007)。
