Boosting the performance of Ni/Al2O3 for the reverse water gas shift reaction through formation of CuNi nanoalloys

dc.contributor.authorGioria, Esteban
dc.contributor.authorIngale, Piyush
dc.contributor.authorPohl, Felix
dc.contributor.authorNaumann d'Alnoncourt, Raoul
dc.contributor.authorThomas, Arne
dc.contributor.authorRosowski, Frank
dc.date.accessioned2022-04-11T06:50:12Z
dc.date.available2022-04-11T06:50:12Z
dc.date.issued2021-11-06
dc.description.abstractNi supported on alumina is extensively employed as a catalyst for the reverse water gas shift reaction. However, the formation of inactive Ni aluminates and the high selectivity to methane affects the performance of these catalysts, especially at low reaction temperatures. In this study, Cu is employed as an effective enhancer of the catalytic performance, promoting the reducibility of Ni, and suppressing methane production through the formation of stable CuNi nanoalloys. The synergy between both metals suppresses consecutive hydrogenation, reaching conversions close to equilibrium and 100% selectivity to carbon monoxide. At 500 °C, the CO yield of the Cu25Ni75/Al2O3 catalyst was twice that of Ni/Al2O3, with only half the hydrogen consumption. The formation of CuNi nanoalloys was confirmed by HAADF STEM–EDS, without segregation in monometallic phases even after 30 h time on stream. Similarly, Cu50Ni50/Al2O3 remained alloyed after the reaction. However, the catalytic activity decreased due to sintering, in agreement with a higher Cu content. This effect was significantly more pronounced for Cu75Ni25/Al2O3 and Cu/Al2O3, with formation of large particles and consequent loss of active surface area.en
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2021en
dc.description.sponsorshipDFG, 390540038, EXC 2008: Unifying Systems in Catalysis "UniSysCat"en
dc.identifier.eissn2044-4761
dc.identifier.issn2044-4753
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16696
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15474
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-16042en
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/en
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.subject.otherCuNi nanoalloysen
dc.subject.otherNi/Al2O3en
dc.subject.otherreverse water gas shiften
dc.subject.otherreactionsen
dc.subject.otherNien
dc.titleBoosting the performance of Ni/Al2O3 for the reverse water gas shift reaction through formation of CuNi nanoalloysen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/D1CY01585Ken
dcterms.bibliographicCitation.issue2en
dcterms.bibliographicCitation.journaltitleCatalysis Science and Technologyen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryen
dcterms.bibliographicCitation.originalpublisherplaceLondonen
dcterms.bibliographicCitation.pageend487en
dcterms.bibliographicCitation.pagestart474en
dcterms.bibliographicCitation.volume12en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften>Inst. Chemie>FG Funktionsmaterialiende
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Funktionsmaterialiende
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlinen
Files
Original bundle
Now showing 1 - 1 of 1
Loading…
Thumbnail Image
Name:
Gioria_etal_Boosting_2022.pdf
Size:
19.09 MB
Format:
Adobe Portable Document Format
Description:
Collections