TY - JOUR
T1 - Multiple-phases LaFeO3 decorated with sea-urchin-like Au nanoparticles for photoelectrochemical hydrogen generation from bio-ethanol and 1-butanol
AU - Tsai, Hsiang Wei
AU - Su, Yen Hsun
N1 - Funding Information:
This work was supported by the Ministry of Science and Technology (MOST) under Project No. 109-2221-E-006-024-MY3 . The authors would like to thank the staff of NCKU and MOST who supported this work.
Publisher Copyright:
© 2021 Hydrogen Energy Publications LLC
PY - 2022/12/12
Y1 - 2022/12/12
N2 - Narrow-band-gap LaFeO3 (approximately 2.1 eV) has good thermal stability, and applications for light-driven water splitting. Thus, heterojunction catalyst containing LaFeO3 and Au nanoparticles (NPs) are investigated for photoelectrochemical hydrogen production. The use of a citric acid or KOH modifier and calcination yields different LaFeO3 particle morphologies and phases (La(OH)3 alone or La(OH)3 and La2O3, respectively), which affect the Au NPs coverage ratio. In addition, the formation of a heterojunction, the surface-plasma resonances (SPRs) effect, and the unique nanospikes on the Au NPs, red-shift happens in the light wavelength and reduce the photonic extinction to less than 2.1 eV. Further, in ethanol and l-butanol under AM 1.5G irradiation, more hydrogen is generated in the former than the latter at all tested temperatures. In addition, the activation energy for the formation of hydrogen is lower in ethanol than in 1-butanol. Finally, an amorphous structure is beneficial for photocatalysis.
AB - Narrow-band-gap LaFeO3 (approximately 2.1 eV) has good thermal stability, and applications for light-driven water splitting. Thus, heterojunction catalyst containing LaFeO3 and Au nanoparticles (NPs) are investigated for photoelectrochemical hydrogen production. The use of a citric acid or KOH modifier and calcination yields different LaFeO3 particle morphologies and phases (La(OH)3 alone or La(OH)3 and La2O3, respectively), which affect the Au NPs coverage ratio. In addition, the formation of a heterojunction, the surface-plasma resonances (SPRs) effect, and the unique nanospikes on the Au NPs, red-shift happens in the light wavelength and reduce the photonic extinction to less than 2.1 eV. Further, in ethanol and l-butanol under AM 1.5G irradiation, more hydrogen is generated in the former than the latter at all tested temperatures. In addition, the activation energy for the formation of hydrogen is lower in ethanol than in 1-butanol. Finally, an amorphous structure is beneficial for photocatalysis.
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U2 - 10.1016/j.ijhydene.2021.10.211
DO - 10.1016/j.ijhydene.2021.10.211
M3 - Article
AN - SCOPUS:85119621391
SN - 0360-3199
VL - 47
SP - 40742
EP - 40754
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 96
ER -