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题名: Correlation between microstructure and performance of Pt/TiO2 catalysts for formaldehyde catalytic oxidation at ambient temperature: Effects of hydrogen pretreatment
作者: Peng, Jiaxi;  Wang, Shudong
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2007-07-12
DOI: 10.1021/jp070821r
卷: 111, 期:27, 页:9897-9904
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: As long-term exposure to indoor air containing even a few ppm of formaldehyde may cause adverse effects on human health, catalytic oxidation is one of the most important and promising processes for the removal of formaldehyde. The catalyst adsorption and transport properties greatly affect its performance, which can be influenced by hydrogen pretreatment. For catalysts pretreated at 450 degrees C, the pore size distribution profile demonstrates the narrowest pore size distribution. Except for the catalyst pretreated at 900 degrees C, all catalysts exhibit a type H2 isotherm according to the IUPAC classification, characteristic of mesoporous materials. On the basis of calculations from the Mahnke and Mogel model, increasing the pretreatment temperature from 300 to 450 degrees C increases the fractal dimension d(f) from 2.23 to 2.39. However, a further increase from 700 to 900 degrees C causes the surface fractal dimension d(f) to decrease from 2.07 to 2.02, respectively. The volcano type of fractal dimension d(f) is also confirmed by the results calculated from Neimark's model, which is coincident with the performance of the catalysts pretreated at different temperatures.
关键词[WOS]: SURFACE FRACTAL DIMENSION ;  NONINTEGER DIMENSIONS ;  PHYSICAL ADSORPTION ;  ELECTRON-MICROSCOPY ;  THERMAL-TREATMENT ;  METAL-CATALYSTS ;  CARBON ;  BEHAVIOR ;  HETEROGENEITY ;  PARTICLES
语种: 英语
WOS记录号: WOS:000247762000034
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140652
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Grad Univ, Chinese Acad Sci, Beijing 100039, Peoples R China

Recommended Citation:
Peng, Jiaxi,Wang, Shudong. Correlation between microstructure and performance of Pt/TiO2 catalysts for formaldehyde catalytic oxidation at ambient temperature: Effects of hydrogen pretreatment[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2007,111(27):9897-9904.
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