Low temperature-high selectivity carbon monoxide methanation over yttria-stabilized zirconia-supported Pt nanoparticles

Rima J. Isaifan; Martin Couillard; Elena A. Baranova

doi:10.1016/j.ijhydene.2017.01.049

Low temperature-high selectivity carbon monoxide methanation over yttria-stabilized zirconia-supported Pt nanoparticles

Rima J. Isaifan, Martin Couillard, Elena A. Baranova^*

^*Corresponding author for this work

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

26 Citations (Scopus)

Abstract

The high purity hydrogen, free from any traces of carbon monoxide is crucial for the efficient operation of hydrogen proton exchange membrane fuel cells (PEMFCs). In this study we report the low temperature (25–120 °C) carbon monoxide methanation in hydrogen-rich streams over 1 wt. % Pt nanoparticles supported on yttria-stabilized zirconia (YSZ) support. Pt nanoparticles with four average particle sizes 1.9, 3.0, 4.4 and 6.7 nm are investigated. The turnover frequency at 30 °C of CO methanation reaction rate doubles with decreasing Pt mean particle size from 6.7 to 1.9 nm. The high activity of Pt/YSZ catalyst is due to the backspillover of ionic species O^δ− from YSZ support to Pt active sites. Under the reaction conditions, O^δ− forms an “effective” double layer at the catalyst surface that weakens CO (electron acceptor) adsorption and strengthens H₂ (electron donor) adsorption bonds and this effect becomes more pronounced as nanoparticle size decreases.

Original language	English
Pages (from-to)	13754-13762
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	42
Issue number	19
DOIs	https://doi.org/10.1016/j.ijhydene.2017.01.049
Publication status	Published - 11 May 2017

Keywords

CO methanation
Hydrogen purification
Ionic conductivity
Oxygen ion promoter
Platinum nanoparticles
Yttria-stabilized zirconia

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10.1016/j.ijhydene.2017.01.049

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title = "Low temperature-high selectivity carbon monoxide methanation over yttria-stabilized zirconia-supported Pt nanoparticles",

abstract = "The high purity hydrogen, free from any traces of carbon monoxide is crucial for the efficient operation of hydrogen proton exchange membrane fuel cells (PEMFCs). In this study we report the low temperature (25–120 °C) carbon monoxide methanation in hydrogen-rich streams over 1 wt. \% Pt nanoparticles supported on yttria-stabilized zirconia (YSZ) support. Pt nanoparticles with four average particle sizes 1.9, 3.0, 4.4 and 6.7 nm are investigated. The turnover frequency at 30 °C of CO methanation reaction rate doubles with decreasing Pt mean particle size from 6.7 to 1.9 nm. The high activity of Pt/YSZ catalyst is due to the backspillover of ionic species Oδ− from YSZ support to Pt active sites. Under the reaction conditions, Oδ− forms an “effective” double layer at the catalyst surface that weakens CO (electron acceptor) adsorption and strengthens H2 (electron donor) adsorption bonds and this effect becomes more pronounced as nanoparticle size decreases.",

keywords = "CO methanation, Hydrogen purification, Ionic conductivity, Oxygen ion promoter, Platinum nanoparticles, Yttria-stabilized zirconia",

author = "Isaifan, \{Rima J.\} and Martin Couillard and Baranova, \{Elena A.\}",

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

year = "2017",

month = may,

day = "11",

doi = "10.1016/j.ijhydene.2017.01.049",

language = "English",

volume = "42",

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T1 - Low temperature-high selectivity carbon monoxide methanation over yttria-stabilized zirconia-supported Pt nanoparticles

AU - Isaifan, Rima J.

AU - Couillard, Martin

AU - Baranova, Elena A.

PY - 2017/5/11

Y1 - 2017/5/11

N2 - The high purity hydrogen, free from any traces of carbon monoxide is crucial for the efficient operation of hydrogen proton exchange membrane fuel cells (PEMFCs). In this study we report the low temperature (25–120 °C) carbon monoxide methanation in hydrogen-rich streams over 1 wt. % Pt nanoparticles supported on yttria-stabilized zirconia (YSZ) support. Pt nanoparticles with four average particle sizes 1.9, 3.0, 4.4 and 6.7 nm are investigated. The turnover frequency at 30 °C of CO methanation reaction rate doubles with decreasing Pt mean particle size from 6.7 to 1.9 nm. The high activity of Pt/YSZ catalyst is due to the backspillover of ionic species Oδ− from YSZ support to Pt active sites. Under the reaction conditions, Oδ− forms an “effective” double layer at the catalyst surface that weakens CO (electron acceptor) adsorption and strengthens H2 (electron donor) adsorption bonds and this effect becomes more pronounced as nanoparticle size decreases.

AB - The high purity hydrogen, free from any traces of carbon monoxide is crucial for the efficient operation of hydrogen proton exchange membrane fuel cells (PEMFCs). In this study we report the low temperature (25–120 °C) carbon monoxide methanation in hydrogen-rich streams over 1 wt. % Pt nanoparticles supported on yttria-stabilized zirconia (YSZ) support. Pt nanoparticles with four average particle sizes 1.9, 3.0, 4.4 and 6.7 nm are investigated. The turnover frequency at 30 °C of CO methanation reaction rate doubles with decreasing Pt mean particle size from 6.7 to 1.9 nm. The high activity of Pt/YSZ catalyst is due to the backspillover of ionic species Oδ− from YSZ support to Pt active sites. Under the reaction conditions, Oδ− forms an “effective” double layer at the catalyst surface that weakens CO (electron acceptor) adsorption and strengthens H2 (electron donor) adsorption bonds and this effect becomes more pronounced as nanoparticle size decreases.

KW - CO methanation

KW - Hydrogen purification

KW - Ionic conductivity

KW - Oxygen ion promoter

KW - Platinum nanoparticles

KW - Yttria-stabilized zirconia

UR - https://www.scopus.com/pages/publications/85011022862

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DO - 10.1016/j.ijhydene.2017.01.049

M3 - Article

AN - SCOPUS:85011022862

SN - 0360-3199

VL - 42

SP - 13754

EP - 13762

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 19

ER -

Low temperature-high selectivity carbon monoxide methanation over yttria-stabilized zirconia-supported Pt nanoparticles

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Keywords

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