文献类型：期刊文献

中文题名：Na改性Pt/AlOOH对甲醛催化氧化反应活性的影响

英文题名：Effects of sodium-modified Pt/AlOOH catalyst on activity of formaldehyde oxidation

作者：赵国冰[1];张琪[1];程飞[1];王天宇[1]

机构：[1]化学工程联合国家重点实验室,华东理工大学,上海200237

年份：2018

卷号：69

期号：11

起止页码：4722

中文期刊名：化工学报

外文期刊名：CIESC Journal

收录：CSTPCD;;EI(收录号：20191006589298);Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2017_2018】；

基金：上海自然科学基金项目(16ZR1408200);中央高校基本科研业务科研专项资金项目(222201817013)

语种：中文

中文关键词：阳极氧化铝;甲醛分解;金属钠;铂分散度;纳米结构催化剂

外文关键词：anodic alumina;HCHO decomposition;Na-modified;Pt dispersion;nanoparticle catalyst

摘要：具有晶面取向的阳极氧化Al OOH因其低温甲醛催化性能而被用于催化氧化甲醛体系。为丰富Al OOH表面羟基含量,采用Na_(2)CO_(3)为Na前体浸渍法改性载体,制备不同Na含量(0.13%、0.19%、0.30%、0.41%,质量分数)的Pt/Na_(x)/Al OOH催化剂。通过BET、FTIR、XPS、HRTEM等表征分析,发现加入Na后,Na/Al OOH的表面羟基更加丰富,Pt/Na_(x)/AlOOH催化剂的比表面积增大,拥有更小的Pt颗粒尺寸,表面Pt颗粒分散度提高,Pt0元素价态含量增加。当Na含量为0.41%时,催化剂Pt/0.41Na/AlOOH的Pt分散度高达56%。实验结果证明,Pt/0.41Na/AlOOH展现出最优的HCHO催化活性,60℃时HCHO转化率达100%。
Structured anodic AlOOH with dominant facets has catalytic characteristics of formaldehyde at low temperature,which were developed and investigated in terms of the catalytic performance in formaldehyde oxidation.To enrich the surface hydroxyl content of AlOOH,Pt/Nax/AlOOH catalysts with different Na contents(0.13%,0.19%,0.30%,0.41%)were prepared by Na_(2)CO_(3) as Na precursor impregnation method.The results given by BET,FTIR and XPS indicate that the soidum-modified Na/AlOOH has much more surface hydroxyls groups,the specific surface area of Pt/Nax/AlOOH and the catalysts have higher Pt dispersion and smaller Pt NPs.When Na content was 0.41%,the Pt dispersion of Pt/0.41Na/AlOOH reached to 56%.The results testified that HCHO was completely diminished at 60℃over Pt/0.41Na/AlOOH,which has the highest catalytic activity of formaldehyde.