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K-Modulated Co Nanoparticles Trapped in La-Ga-O as Superior Catalysts for Higher Alcohols Synthesis from Syngas
Tianjin Univ, Sch Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Tianjin 300350, Peoples R China.;Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China..
Luoyang Normal Univ, Coll Chem & Chem Engn, Luoyang 471934, Peoples R China.;Luoyang Normal Univ, Key Lab Funct Oriented Porous Mat Henan Prov, Luoyang 471934, Peoples R China..
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
Tianjin Univ, Sch Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Tianjin 300350, Peoples R China.;Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China..
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2019 (English)In: CATALYSTS, ISSN 2073-4344, Vol. 9, no 3, article id 218Article in journal (Refereed) Published
Abstract [en]

Owing to the outstanding catalytic performance for higher alcohol synthesis, Ga-Co catalysts have attracted much attention. In view of their unsatisfactory stability and alcohol selectivity, herein, K-modulated Co nanoparticles trapped in La-Ga-O catalysts were prepared by the reduction of La1-xKxCo0.65Ga0.35O3 perovskite precursor. Benefiting from the atomic dispersion of all the elements in the precursor, during the reduction of La1-xKxCo0.65Ga0.35O3, Co nanoparticles could be confined into the K-modified La-Ga-O composite oxides, and the confinement of La-Ga-O could improve the anti-sintering performance of Co nanoparticles. In addition, the addition of K modulated parts of La-Ga-O into La2O3, which ameliorated the anti-carbon deposition performance. Finally, the addition of K increased the dispersion of cobalt and provided more electron donors to metallic Co, resulting in a high activity and superior selectivity to higher alcohols. Benefiting from the above characteristics, the catalyst possesses excellent activity, good selectivity, and superior stability.

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 9, no 3, article id 218
Keywords [en]
perovskite-type oxide (PTO), cobalt, gallium, potassium, higher alcohols, syngas
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-251356DOI: 10.3390/catal9030218ISI: 000465012800012Scopus ID: 2-s2.0-85063446257OAI: oai:DiVA.org:kth-251356DiVA, id: diva2:1316123
Note

QC 20190516

Available from: 2019-05-16 Created: 2019-05-16 Last updated: 2019-05-23Bibliographically approved

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