Enhanced catalytic activity of monodispersed AgPd alloy nanoparticles assembled on mesoporous graphitic carbon nitride for the hydrolytic dehydrogenation of ammonia borane under sunlight
NANO RESEARCH, cilt.10, sa.5, ss.1627-1640, 2017 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 10 Sayı: 5
- Basım Tarihi: 2017
- Doi Numarası: 10.1007/s12274-016-1345-x
- Dergi Adı: NANO RESEARCH
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.1627-1640
- Anahtar Kelimeler: silver, palladium, alloy nanoparticles, graphitic carbon nitride, ammonia borane, dehydrogenation, REDUCED GRAPHENE OXIDE, HYDROGEN GENERATION SYSTEM, CROSS-COUPLING REACTIONS, FORMIC-ACID, PALLADIUM NANOPARTICLES, PHOTOCATALYTIC ACTIVITY, METAL NANOPARTICLES, EFFICIENT CATALYSTS, AG/PD NANOPARTICLES, STORAGE MATERIALS
- Atatürk Üniversitesi Adresli: Evet
Özet
We address the composition-controlled synthesis of monodispersed AgPd alloy nanoparticles (NPs), their assembly for the first time on mesoporous graphitic carbon nitride (mpg-C3N4), and the unprecedented catalysis of mpg-C3N4@AgPd in the hydrolytic dehydrogenation of ammonia borane (AB) at room temperature. Monodispersed AgPd alloy NPs were synthesized using a high-temperature organic-phase surfactant-assisted protocol comprising the co-reduction of silver(I) acetate and palladium(II) acetylacetonate in the presence of oleylamine, oleic acid, and 1-octadecene. This protocol allowed the synthesis of four different compositions of AgPd alloy NPs. The AgPd alloy NPs were then assembled on mpg-C3N4, reduced graphene oxide, and Ketjenblack using a liquid-phase self-assembly method. Among the three supports tested, the mpg-C3N4@AgPd catalysts provided the best activity because of the Mott-Schottky effect, which was driven by the favorable work function difference between mpg-C3N4 and the metal NPs. Moreover, the activity of the mpg-C3N4@AgPd catalyst was further enhanced by an acetic acid treatment (AAt), and a record initial turnover frequency of 94.1 mol((hydrogen)).mol((catalyst))(-1).min(-1) was obtained. Furthermore, the mpg-C3N4@Ag42Pd58-AAt catalyst also showed moderate durability for the hydrolysis of AB. This study also includes a wealth of kinetic data for the mpg-C3N4@AgPd-catalyzed hydrolysis of AB.