Na改性Pt/AlOOH对甲醛催化氧化反应活性的影响

doi:10.11949/j.issn.0438-1157.20180531

化工学报 ›› 2018, Vol. 69 ›› Issue (11): 4722-4727.DOI: 10.11949/j.issn.0438-1157.20180531

• 催化、动力学与反应器 • 上一篇下一篇

Na改性Pt/AlOOH对甲醛催化氧化反应活性的影响

赵国冰, 张琪, 程飞, 王天宇

化学工程联合国家重点实验室, 华东理工大学, 上海 200237

收稿日期:2018-05-22 修回日期:2018-08-26 出版日期:2018-11-05 发布日期:2018-11-05
通讯作者: 张琪
基金资助:
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）。

Effects of sodium-modified Pt/AlOOH catalyst on activity of formaldehyde oxidation

ZHAO Guobing, ZHANG Qi, CHENG Fei, WANG Tianyu

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2018-05-22 Revised:2018-08-26 Online:2018-11-05 Published:2018-11-05
Supported by:
supported by the Natural Science Foundation of Shanghai (16ZR1408200) and the Fundamental Research Funds for the Central Universities (222201817013).

摘要/Abstract

摘要：

具有晶面取向的阳极氧化AlOOH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AlOOH表面羟基含量，采用Na₂CO₃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/AlOOH催化剂。通过BET、FTIR、XPS、HRTEM等表征分析，发现加入Na后，Na/AlOOH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%。

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

Abstract:

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/Na_x/AlOOH catalysts with different Na contents (0.13%, 0.19%, 0.30%, 0.41%) were prepared by Na₂CO₃ 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/Na_x/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.

Key words: anodic alumina, HCHO decomposition, Na-modified, Pt dispersion, nanoparticle catalyst

中图分类号:

TQ032
O643

赵国冰, 张琪, 程飞, 王天宇. Na改性Pt/AlOOH对甲醛催化氧化反应活性的影响[J]. 化工学报, 2018, 69(11): 4722-4727.

ZHAO Guobing, ZHANG Qi, CHENG Fei, WANG Tianyu. Effects of sodium-modified Pt/AlOOH catalyst on activity of formaldehyde oxidation[J]. CIESC Journal, 2018, 69(11): 4722-4727.

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Na改性Pt/AlOOH对甲醛催化氧化反应活性的影响

Effects of sodium-modified Pt/AlOOH catalyst on activity of formaldehyde oxidation

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