摘要
通过阴极电镀在钛基表面制备出镍中间层,随后在其上再进行阳极电沉积β-PbO_2涂层来制备Ti/Ni/PbO_2电极,并与无镍中间层的Ti/PbO_2电极进行对比。通过微结构分析、1 mol/LH_2SO_4溶液中的加速寿命试验、电化学性能测试和电氧化苯酚模拟废水行为研究,考察了电镀镍中间层对二氧化铅涂层电极的结构和性能的影响。结果表明,电镀镍中间层的引入不仅使活性β-PbO_2涂层的晶粒细化,增强了电极的催化活性,而且有效地改善了电极表面的导电性,降低了槽压,使得电极表面电势均匀分布,从而明显地延长了电极寿命,降低了电催化氧化降解苯酚模拟废水的能耗。
A nickel intermediate layer was firstly electrodeposited on the titanium substrate by cathodic electroplating, and then theβ-PbO2 coating was electrosynthesized by anodic oxidation. The Ti/Ni/PbO2 was compared with the Ti/PbO2 electrodes withoutintermediate layer. The effects of plating nickel intermediate layer on the structure and performance of PbO2-coated electrodes wereinvestigated by microstructure characterization, accelerated life test in 1 mol/L H2SO4 solution, electrochemical performance andelectro-oxidation behavior of simulated phenol wastewater. The results indicate that the introduction of nickel electroplating intermediatelayer leads to the grain refinement of the surface active β-PbO2 coating, thus enhancing the catalytic performance of PbO2-coatedelectrodes. Furthermore, the Ni intermediate improves the conductivity of the electrode, significantly reduces cell voltage, and enhancespotential uniform distribution of the electrode surface, thus extending the electrode lifetime and reducing the energy consumption ofelectrocatalytic oxidation of simulated phenol wastewater.
作者
唐长斌
郑超
于丽花
薛娟琴
Tang Changbin;Zheng Chao;Yu Lihua;Xue Juanqin(Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2019年第1期143-151,共9页
Rare Metal Materials and Engineering
基金
国家自然科学基金(51278407)
榆林市科技计划项目(2015cxy-14-01)
关键词
电镀镍中间层
电极寿命
电能耗
电催化
nickel intermediate layer
electrode life
energy consumption
electrocatalysis
作者简介
唐长斌,男,1973年生,博士,副教授,西安建筑科技大学冶金工程学院,陕西西安710055,电话:029-82205124,E-mailtcbtop@126.com.
