高结晶度镍铝水滑石的制备及其电化学行为研究  

Studies on the preparation and electrochemical performance of Ni/Al hydrotalcite with high crystallinty

作　　者：王君 刘岩峰[2] 刘琦[2] 张光春[2] 张艳[2] 姜兆华[1] 景晓燕[2] 张密林[2] 

机构地区：[1]哈尔滨工业大学化工学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学材料科学与化学工程学院,黑龙江哈尔滨150001

出　　处：《化学研究与应用》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)

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.

关 键 词：镍铝水滑石 水热法 尿素 水滑石修饰电极 

分 类 号：O614.8[理学—无机化学]