Stable and efficient Pt–Re/TiO2 catalysts for water-gas-shift: on the effect of Rhenium

K.G.H. Azzam; Igor V. Babych; Kulathuiyer Seshan; Barbara Mojet; Leonardus Lefferts

doi:10.1002/cctc.201200492

Stable and efficient Pt–Re/TiO2 catalysts for water-gas-shift: on the effect of Rhenium

K.G.H. Azzam, Igor V. Babych, Kulathuiyer Seshan, Barbara Mojet, Leonardus Lefferts

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

29 Citations (Scopus)

Abstract

The catalytic performance of Pt–Re/TiO2 catalysts, that is, activity and stability, in single-stage water gas shift reactions was investigated by studying the influence of preparation strategies, Pt/Re molar ratios, and metals contents. Results show that sequential impregnation of Re precursor prior to Pt precursor without intermediate pretreatment is the optimum preparation strategy. The Pt/Re ratio of unity with 0.5 wt. % Pt content resulted in the most significant effect on activity and stability. In situ characterizing of both monometallic and the optimal bimetallic Pt–Re catalysts by means of CO chemisorption, H2 temperature programmed reduction, and FTIR spectroscopy under the reaction conditions provided evidence that Re increases the activity by enhancing the activation of water. No evidence was found for any direct influence of Re on the properties of Pt in the catalyst under the reaction conditions.

Original language	English
Pages (from-to)	557-564
Journal	ChemCatChem
Volume	5
Issue number	2
DOIs	https://doi.org/10.1002/cctc.201200492
Publication status	Published - 2013

Keywords

METIS-290716
IR-82577

Access to Document

10.1002/cctc.201200492

Cite this

@article{dd0639a339e24c3ab1e1cfdcc4e8bd76,

title = "Stable and efficient Pt–Re/TiO2 catalysts for water-gas-shift: on the effect of Rhenium",

abstract = "The catalytic performance of Pt–Re/TiO2 catalysts, that is, activity and stability, in single-stage water gas shift reactions was investigated by studying the influence of preparation strategies, Pt/Re molar ratios, and metals contents. Results show that sequential impregnation of Re precursor prior to Pt precursor without intermediate pretreatment is the optimum preparation strategy. The Pt/Re ratio of unity with 0.5 wt. % Pt content resulted in the most significant effect on activity and stability. In situ characterizing of both monometallic and the optimal bimetallic Pt–Re catalysts by means of CO chemisorption, H2 temperature programmed reduction, and FTIR spectroscopy under the reaction conditions provided evidence that Re increases the activity by enhancing the activation of water. No evidence was found for any direct influence of Re on the properties of Pt in the catalyst under the reaction conditions.",

keywords = "METIS-290716, IR-82577",

author = "K.G.H. Azzam and Babych, {Igor V.} and Kulathuiyer Seshan and Barbara Mojet and Leonardus Lefferts",

year = "2013",

doi = "10.1002/cctc.201200492",

language = "English",

volume = "5",

pages = "557--564",

journal = "ChemCatChem",

issn = "1867-3880",

publisher = "Wiley-VCH Verlag",

number = "2",

}

TY - JOUR

T1 - Stable and efficient Pt–Re/TiO2 catalysts for water-gas-shift: on the effect of Rhenium

AU - Azzam, K.G.H.

AU - Babych, Igor V.

AU - Seshan, Kulathuiyer

AU - Mojet, Barbara

AU - Lefferts, Leonardus

PY - 2013

Y1 - 2013

N2 - The catalytic performance of Pt–Re/TiO2 catalysts, that is, activity and stability, in single-stage water gas shift reactions was investigated by studying the influence of preparation strategies, Pt/Re molar ratios, and metals contents. Results show that sequential impregnation of Re precursor prior to Pt precursor without intermediate pretreatment is the optimum preparation strategy. The Pt/Re ratio of unity with 0.5 wt. % Pt content resulted in the most significant effect on activity and stability. In situ characterizing of both monometallic and the optimal bimetallic Pt–Re catalysts by means of CO chemisorption, H2 temperature programmed reduction, and FTIR spectroscopy under the reaction conditions provided evidence that Re increases the activity by enhancing the activation of water. No evidence was found for any direct influence of Re on the properties of Pt in the catalyst under the reaction conditions.

AB - The catalytic performance of Pt–Re/TiO2 catalysts, that is, activity and stability, in single-stage water gas shift reactions was investigated by studying the influence of preparation strategies, Pt/Re molar ratios, and metals contents. Results show that sequential impregnation of Re precursor prior to Pt precursor without intermediate pretreatment is the optimum preparation strategy. The Pt/Re ratio of unity with 0.5 wt. % Pt content resulted in the most significant effect on activity and stability. In situ characterizing of both monometallic and the optimal bimetallic Pt–Re catalysts by means of CO chemisorption, H2 temperature programmed reduction, and FTIR spectroscopy under the reaction conditions provided evidence that Re increases the activity by enhancing the activation of water. No evidence was found for any direct influence of Re on the properties of Pt in the catalyst under the reaction conditions.

KW - METIS-290716

KW - IR-82577

U2 - 10.1002/cctc.201200492

DO - 10.1002/cctc.201200492

M3 - Article

VL - 5

SP - 557

EP - 564

JO - ChemCatChem

JF - ChemCatChem

SN - 1867-3880

IS - 2

ER -

Stable and efficient Pt–Re/TiO2 catalysts for water-gas-shift: on the effect of Rhenium

Abstract

Keywords

Access to Document

Fingerprint

Cite this