Gold nanoparticles-assisted sodium borohydride supported on titania as a catalyst for the oxidative steam reforming of methanol and CO oxidation
Issued Date
2022-12-01
Resource Type
eISSN
23524928
Scopus ID
2-s2.0-85142702467
Journal Title
Materials Today Communications
Volume
33
Rights Holder(s)
SCOPUS
Bibliographic Citation
Materials Today Communications Vol.33 (2022)
Suggested Citation
Atjayutpokin T., Eaimsumang S., Smith S.M., Boonyuen S., Luengnaruemitchai A. Gold nanoparticles-assisted sodium borohydride supported on titania as a catalyst for the oxidative steam reforming of methanol and CO oxidation. Materials Today Communications Vol.33 (2022). doi:10.1016/j.mtcomm.2022.105019 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/85068
Title
Gold nanoparticles-assisted sodium borohydride supported on titania as a catalyst for the oxidative steam reforming of methanol and CO oxidation
Other Contributor(s)
Abstract
Gold (Au) nanoparticles (NPs) and Au-copper (ii) oxide (CuO) supported on titania (TiO2) catalysts prepared by deposition-precipitation were investigated for the oxidative steam reforming of methanol (OSRM) and CO oxidation reactions. The effect of sodium borohydride (NaBH4) as a reducing agent during the Au catalyst preparation was studied. Characterization by high-resolution transmission electron microscopy established that an optimal NaBH4 quantity provided small Au NPs of less than 5 nm diameter with a uniform distribution that exhibited a higher catalytic activity than the others in the OSRM. The Au-CuO catalysts formed with different metal atomic ratios were also synthesized and compared for their catalytic activities in the OSRM and CO oxidation reactions with those from Au/TiO2 and Cu/TiO2. All Au-CuO catalysts achieved the highest methanol conversion at 400 °C, whereas the monometallic Au provided an almost five-fold higher catalytic CO oxidation activity due to the possession of smaller particles than in the other catalysts.