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Influence of the rare earth (R) element in Ru-supported RScSi electride-like intermetallic catalysts for ammonia synthesis at low pressure: insight into NH3 formation mechanism

hal.structure.identifierInstitut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
dc.contributor.authorCROISÉ, Charlotte
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorALABD, Khaled
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTENCÉ, Sophie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDIN, Etienne
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorVILLESUZANNE, Antoine
hal.structure.identifierInstitut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
dc.contributor.authorCOURTOIS, Xavier
hal.structure.identifierInstitut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
dc.contributor.authorBION, Nicolas
hal.structure.identifierInstitut de chimie des milieux et matériaux de Poitiers [UMR 7285] [IC2MP [Poitiers]]
dc.contributor.authorCAN, Fabien
dc.date.issued2023
dc.identifier.issn1867-3899
dc.description.abstractEnThis study investigates the influence of the rare-earth (R) element in Ru/RScSi electride-like intermetallic catalysts for ammonia synthesis under mild conditions (300–450 °C; 1–5 bar). All materials present poor specific surface area and the grain size impacts the ammonia yield. The catalytic performances follow the La to Gd lanthanides series (Ru1.7/LaScSi=Ru1.7/CeScSi=Ru1.7/PrScSi>Ru1.7/NdScSi>Ru1.5/SmScSi>Ru1.3/GdScSi) and appear correlated with the formation of the hydride phase. Ru1.7/CeScSi shows remarkable catalytic activity under moderate condition (0.58 mmolNH3/h/g at 300 °C, 1 bar) associated with its reversible hydrogen storage–release properties. It is evidenced that RScSi materials assist the N2 dissociation in agreement with their electride character and that the hydrogen for NH3 formation mainly comes from gaseous hydrogen and not primarily from the hydride phase. It is suggested that NHX formation could be the rate determining step rather than the N2 cleavage over these catalysts.
dc.description.sponsorshipElectrures intermétalliques : De nouveaux matériaux pour la synthèse catalytique de l'ammoniac - ANR-19-CE07-0023
dc.language.isoen
dc.publisherWiley
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.subject.enhydride
dc.subject.enintermetallic
dc.subject.enNH3
dc.subject.enruthenium
dc.subject.entransient experiments
dc.title.enInfluence of the rare earth (R) element in Ru-supported RScSi electride-like intermetallic catalysts for ammonia synthesis at low pressure: insight into NH3 formation mechanism
dc.typeArticle de revue
dc.identifier.doi10.1002/cctc.202201172
dc.subject.halChimie/Catalyse
bordeaux.journalChemCatChem
bordeaux.pagee202201172 (12 p.)
bordeaux.volume15
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-03992609
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03992609v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ChemCatChem&rft.date=2023&rft.volume=15&rft.issue=3&rft.spage=e202201172%20(12%20p.)&rft.epage=e202201172%20(12%20p.)&rft.eissn=1867-3899&rft.issn=1867-3899&rft.au=CROIS%C3%89,%20Charlotte&ALABD,%20Khaled&TENC%C3%89,%20Sophie&GAUDIN,%20Etienne&VILLESUZANNE,%20Antoine&rft.genre=article


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