摘要
采用化学镀法在Nafion膜上直接沉积制备了PbO2/SPE复合膜电极,结合XRD、SEM分析了复合膜电极上沉积层的晶相结构和形貌特征。结果表明,膜上沉积层为单一的四方结构β型PbO2,且其在Nafion膜上沉积致密,颗粒均匀,尺寸范围为300～500nm。通过恒电流电解实验研究了β-PbO2/SPE复合膜电极电解发生臭氧的性能。结果表明,β-PbO2/SPE复合膜电极相比于其它两种膜电极更适合作为电解发生臭氧的阳极材料,在所测试的电流密度范围内,当i=1.5A/cm2时,臭氧产量达到最高为49.64mg/h,电流效率14.1%,槽压4.33V,能耗102.7W·h/(gO3)。
PbO2/SPE composite membrane electrode was prepared by electroless plating directly deposited on Nafion membrane.The crystalline structure and morphology were analyzed by XRD and SEM.Results showed that the deposited layer on the membrane has a single tetragonal β-PbO2 with homogenous and dense structure and particle size of about 300-500 nm.The anodic oxygen evolution characteristic and electrolytic ozone properties of the prepared β-PbO2/SPE composite membrane electrode was investigated by using Galvanostat experiments.Compared to the other two membrane electrodes,the β-PbO2/SPE membrane electrode is more suitable as anode material for electrolytic ozone generation.Under i= 1.5 A/cm2,ozone production reached to 49.64 mg/h with current efficiency of 14.1%,bath voltage of 4.33 V and power consumption of 102.7 W·h/（g O3）.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第5期914-917,967,共5页
Chemical Industry and Engineering Progress
关键词
二氧化铅
复合膜电极
臭氧
电解
PbO2
composite membrane electrode
ozone
electrolysis
