摘要
Using urea and alkali as precipitators,a series of carbonate pillared Ni/Al hydrotalcite were synthesized by hydrothermal methods.The crystal structure and morphology of Ni/Al hydrotalcite were characterized by XRD、FT-IR and TEM.The electrochemical properties of Ni/Al hydrotalcite modified electrode in 0.5 mol/L NaOH electrical media was investigated by cyclic voltammetry and alternating current impedance measurements.The results indicate that the obtained samples synthesized using two different precipitators have the typical layered structure ordering of hydrotalcite and nice crystal forms;Moreover,layered double hydroxides synthesized by homogeneous precipitation through urea hydrolysis have better crystallization than samples using alkali as precipitator;Furthermore,electrochemical reaction in 0.5 mol/L NaOH electrical media occurs under semi-infinite linear diffusion conditions,the stability and the cyclic capability of hydrotalcite modified electrode are related to its crystallinity,the higher the crystallinity is,the better the stability and the cyclic capability are.
Using urea and alkali as precipitators, a series of carbonate pillared Ni/Al hydrotalcite were synthesized by hydrothermal methods. The crystal structure and morphology of Ni/Al hydrotalcite were characterized by XRD. FT-IR and TEM. The electrochemical properties of Ni/Al hydrotalcite modified electrode in 0. 5 mol/L NaOH electrical media was investigated by cyclic voltammetry and alternating current impedance measurements. The results indicate that the obtained samples synthesized using two different precipitators have the typical layered structure ordering of hydrotalcite and nice crystal forms;Moreover, layered double hydroxides synthesized by homogeneous precipitation through urea hydrolysis have better crystallization than samples using alkali as precipitator; Furthermore, electrochemical reaction in 0. 5 mol/L NaOH electrical media occurs under semi-infinite linear diffusion conditions, the stability and the cyclic capability of hydrotalcite modified electrode are related to its crystallinity, the higher the crystallinity is,the better the stability and the cyclic capability are.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2010年第3期379-383,共5页
Chemical Research and Application
基金
中国博士后科学基金项目(AUGA41309003)
黑龙江省博士后基金资助项目(AUGA41100035)
黑龙江省重点科技攻关资助项目(TB06A05)
哈尔滨市科技创新人才基金资助项目(2008RFQXG028)
关键词
镍铝水滑石
水热法
尿素
水滑石修饰电极
Ni/Al hydrotaleite
Hydrothermal method
Urea
Hydrotalcite modified electrode
