Formaldehyde oxidation on silica-supported Pt catalysts: The influence of thermal pretreatments on particle formation and on oxidation mechanism

Hung Chi Wu; Tse Ching Chen; Yan Chu Chen; Jyh Fu Lee; Ching Shiun Chen

doi:10.1016/j.jcat.2017.08.029

Formaldehyde oxidation on silica-supported Pt catalysts: The influence of thermal pretreatments on particle formation and on oxidation mechanism

Hung Chi Wu, Tse Ching Chen, Yan Chu Chen, Jyh Fu Lee, Ching Shiun Chen^*

^*Corresponding author for this work

Center for General Education

Research output: Contribution to journal › Journal Article › peer-review

55 Scopus citations

Abstract

In this work, thermal treatment of 0.2 wt.% Pt⁴⁺ deposited on SiO₂ through vacuum calcination and H₂ reduction is used to synthesize Pt particles less than 1 nm in diameter that are uniformly dispersed on the SiO₂. Traditional treatments involving air calcination/H₂ reduction on the same 0.2 wt.% Pt⁴⁺/SiO₂ result in the formation of inhomogeneous Pt particles with an average size of ∼8.4 nm. The tiny Pt particles have an improved reaction rate at ambient temperature and better catalytic stability for formaldehyde (HCHO) oxidation. The formation mechanism of tiny Pt particles and the reaction mechanism of HCHO oxidation were investigated. The CO decomposition product from HCHO could be the essential intermediate in the course of HCHO oxidation, and the oxidative reaction pathway should be HCHO → CO → CO₂. Adsorbed HCHO may bond to the Pt surface in the η² configuration and form CO through a decomposition process.

Original language	English
Pages (from-to)	87-100
Number of pages	14
Journal	Journal of Catalysis
Volume	355
DOIs	https://doi.org/10.1016/j.jcat.2017.08.029
State	Published - 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Inc.

Keywords

Formaldehyde oxidation
Pt/SiO
Vacuum calcination

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title = "Formaldehyde oxidation on silica-supported Pt catalysts: The influence of thermal pretreatments on particle formation and on oxidation mechanism",

abstract = "In this work, thermal treatment of 0.2 wt.% Pt4+ deposited on SiO2 through vacuum calcination and H2 reduction is used to synthesize Pt particles less than 1 nm in diameter that are uniformly dispersed on the SiO2. Traditional treatments involving air calcination/H2 reduction on the same 0.2 wt.% Pt4+/SiO2 result in the formation of inhomogeneous Pt particles with an average size of ∼8.4 nm. The tiny Pt particles have an improved reaction rate at ambient temperature and better catalytic stability for formaldehyde (HCHO) oxidation. The formation mechanism of tiny Pt particles and the reaction mechanism of HCHO oxidation were investigated. The CO decomposition product from HCHO could be the essential intermediate in the course of HCHO oxidation, and the oxidative reaction pathway should be HCHO → CO → CO2. Adsorbed HCHO may bond to the Pt surface in the η2 configuration and form CO through a decomposition process.",

keywords = "Formaldehyde oxidation, Pt/SiO, Vacuum calcination",

author = "Wu, {Hung Chi} and Chen, {Tse Ching} and Chen, {Yan Chu} and Lee, {Jyh Fu} and Chen, {Ching Shiun}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Inc.",

year = "2017",

doi = "10.1016/j.jcat.2017.08.029",

language = "英语",

volume = "355",

pages = "87--100",

journal = "Journal of Catalysis",

issn = "0021-9517",

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T1 - Formaldehyde oxidation on silica-supported Pt catalysts

T2 - The influence of thermal pretreatments on particle formation and on oxidation mechanism

AU - Wu, Hung Chi

AU - Chen, Tse Ching

AU - Chen, Yan Chu

AU - Lee, Jyh Fu

AU - Chen, Ching Shiun

PY - 2017

Y1 - 2017

N2 - In this work, thermal treatment of 0.2 wt.% Pt4+ deposited on SiO2 through vacuum calcination and H2 reduction is used to synthesize Pt particles less than 1 nm in diameter that are uniformly dispersed on the SiO2. Traditional treatments involving air calcination/H2 reduction on the same 0.2 wt.% Pt4+/SiO2 result in the formation of inhomogeneous Pt particles with an average size of ∼8.4 nm. The tiny Pt particles have an improved reaction rate at ambient temperature and better catalytic stability for formaldehyde (HCHO) oxidation. The formation mechanism of tiny Pt particles and the reaction mechanism of HCHO oxidation were investigated. The CO decomposition product from HCHO could be the essential intermediate in the course of HCHO oxidation, and the oxidative reaction pathway should be HCHO → CO → CO2. Adsorbed HCHO may bond to the Pt surface in the η2 configuration and form CO through a decomposition process.

AB - In this work, thermal treatment of 0.2 wt.% Pt4+ deposited on SiO2 through vacuum calcination and H2 reduction is used to synthesize Pt particles less than 1 nm in diameter that are uniformly dispersed on the SiO2. Traditional treatments involving air calcination/H2 reduction on the same 0.2 wt.% Pt4+/SiO2 result in the formation of inhomogeneous Pt particles with an average size of ∼8.4 nm. The tiny Pt particles have an improved reaction rate at ambient temperature and better catalytic stability for formaldehyde (HCHO) oxidation. The formation mechanism of tiny Pt particles and the reaction mechanism of HCHO oxidation were investigated. The CO decomposition product from HCHO could be the essential intermediate in the course of HCHO oxidation, and the oxidative reaction pathway should be HCHO → CO → CO2. Adsorbed HCHO may bond to the Pt surface in the η2 configuration and form CO through a decomposition process.

KW - Formaldehyde oxidation

KW - Pt/SiO

KW - Vacuum calcination

UR - http://www.scopus.com/inward/record.url?scp=85030149009&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2017.08.029

DO - 10.1016/j.jcat.2017.08.029

M3 - 文章

AN - SCOPUS:85030149009

SN - 0021-9517

VL - 355

SP - 87

EP - 100

JO - Journal of Catalysis

JF - Journal of Catalysis

ER -

Formaldehyde oxidation on silica-supported Pt catalysts: The influence of thermal pretreatments on particle formation and on oxidation mechanism

Abstract

Bibliographical note

Keywords

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