Particle size effect on catalytic activity of carbon-supported Pt nanoparticles for complete ethylene oxidation

Rima J. Isaifan; Spyridon Ntais; Elena A. Baranova

doi:10.1016/j.apcata.2013.05.027

Particle size effect on catalytic activity of carbon-supported Pt nanoparticles for complete ethylene oxidation

Rima J. Isaifan, Spyridon Ntais, Elena A. Baranova^*

^*Corresponding author for this work

University of Ottawa

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

107 Citations (Scopus)

Abstract

Effect of Pt particle size on the catalytic activity of complete ethylene oxidation in the temperature range of 25-220 C in fuel-lean conditions is investigated. Carbon black is used as a support for platinum nanoparticles of well-defined average sizes between 1.5 and 6.3 nm. The results demonstrate that ethylene oxidation on Pt/C is strongly size sensitive reaction. Thus, the smallest Pt/C-4 nanoparticles (1.5 ± 0.5 nm) exhibit much higher catalytic activity toward ethylene oxidation reaching 50% conversion at 88 C compared to 164 C for the largest Pt/C-1 (6.3 ± 0.5 nm) nanocatalysts. XPS shows that particle size decrease results in noticeable binding energy increase and Pt4f peak broadenings. This indicates that the electronic effect induced by small Pt nanoparticles might play a role in the observed increase in their activity toward C₂H₄ oxidation.

Original language	English
Pages (from-to)	87-94
Number of pages	8
Journal	Applied Catalysis A: General
Volume	464-465
DOIs	https://doi.org/10.1016/j.apcata.2013.05.027
Publication status	Published - 2013
Externally published	Yes

Keywords

Carbon black
Dispersion
Ethylene oxidation
Particle size effect
Platinum nanoparticles
X-ray photoelectron spectroscopy

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10.1016/j.apcata.2013.05.027

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title = "Particle size effect on catalytic activity of carbon-supported Pt nanoparticles for complete ethylene oxidation",

abstract = "Effect of Pt particle size on the catalytic activity of complete ethylene oxidation in the temperature range of 25-220 C in fuel-lean conditions is investigated. Carbon black is used as a support for platinum nanoparticles of well-defined average sizes between 1.5 and 6.3 nm. The results demonstrate that ethylene oxidation on Pt/C is strongly size sensitive reaction. Thus, the smallest Pt/C-4 nanoparticles (1.5 ± 0.5 nm) exhibit much higher catalytic activity toward ethylene oxidation reaching 50% conversion at 88 C compared to 164 C for the largest Pt/C-1 (6.3 ± 0.5 nm) nanocatalysts. XPS shows that particle size decrease results in noticeable binding energy increase and Pt4f peak broadenings. This indicates that the electronic effect induced by small Pt nanoparticles might play a role in the observed increase in their activity toward C2H4 oxidation.",

keywords = "Carbon black, Dispersion, Ethylene oxidation, Particle size effect, Platinum nanoparticles, X-ray photoelectron spectroscopy",

author = "Isaifan, {Rima J.} and Spyridon Ntais and Baranova, {Elena A.}",

year = "2013",

doi = "10.1016/j.apcata.2013.05.027",

language = "English",

volume = "464-465",

pages = "87--94",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Particle size effect on catalytic activity of carbon-supported Pt nanoparticles for complete ethylene oxidation

AU - Isaifan, Rima J.

AU - Ntais, Spyridon

AU - Baranova, Elena A.

PY - 2013

Y1 - 2013

N2 - Effect of Pt particle size on the catalytic activity of complete ethylene oxidation in the temperature range of 25-220 C in fuel-lean conditions is investigated. Carbon black is used as a support for platinum nanoparticles of well-defined average sizes between 1.5 and 6.3 nm. The results demonstrate that ethylene oxidation on Pt/C is strongly size sensitive reaction. Thus, the smallest Pt/C-4 nanoparticles (1.5 ± 0.5 nm) exhibit much higher catalytic activity toward ethylene oxidation reaching 50% conversion at 88 C compared to 164 C for the largest Pt/C-1 (6.3 ± 0.5 nm) nanocatalysts. XPS shows that particle size decrease results in noticeable binding energy increase and Pt4f peak broadenings. This indicates that the electronic effect induced by small Pt nanoparticles might play a role in the observed increase in their activity toward C2H4 oxidation.

AB - Effect of Pt particle size on the catalytic activity of complete ethylene oxidation in the temperature range of 25-220 C in fuel-lean conditions is investigated. Carbon black is used as a support for platinum nanoparticles of well-defined average sizes between 1.5 and 6.3 nm. The results demonstrate that ethylene oxidation on Pt/C is strongly size sensitive reaction. Thus, the smallest Pt/C-4 nanoparticles (1.5 ± 0.5 nm) exhibit much higher catalytic activity toward ethylene oxidation reaching 50% conversion at 88 C compared to 164 C for the largest Pt/C-1 (6.3 ± 0.5 nm) nanocatalysts. XPS shows that particle size decrease results in noticeable binding energy increase and Pt4f peak broadenings. This indicates that the electronic effect induced by small Pt nanoparticles might play a role in the observed increase in their activity toward C2H4 oxidation.

KW - Carbon black

KW - Dispersion

KW - Ethylene oxidation

KW - Particle size effect

KW - Platinum nanoparticles

KW - X-ray photoelectron spectroscopy

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U2 - 10.1016/j.apcata.2013.05.027

DO - 10.1016/j.apcata.2013.05.027

M3 - Article

AN - SCOPUS:84879036495

SN - 0926-860X

VL - 464-465

SP - 87

EP - 94

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

ER -

Particle size effect on catalytic activity of carbon-supported Pt nanoparticles for complete ethylene oxidation

Abstract

Keywords

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