TY - JOUR
T1 - Enhanced oxygen reduction reaction stability on platinum nanoparticles photo-deposited onto oxide-carbon composites
AU - Estudillo-Wong, Luis Alberto
AU - Luo, Yun
AU - Díaz-Real, Jesús Adrián
AU - Alonso-Vante, Nicolas
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/6/15
Y1 - 2016/6/15
N2 - Oxide-Carbon composites (TiO2-C) and yttrium-doped TiO2-C (Y:TiO2-C), synthesized via sol-gel route, were used as supports to photo-deposit platinum nanoparticles (Pt NPs). The physical-chemical properties of these materials were investigated by Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD). The TEM images showed that Pt NPs were agglomerated and deposited onto oxide sites of the composites. Pt face-centered cubic, and TiO2 Anatase phases were identified on both Pt/TiO2-C and Pt/Y:TiO2-C samples. The particle size, stacking fault and micro-strain of Pt NPs were estimated by Williamson-Hall method. Compared with Pt/TiO2-C, similar stacking faults as well as increased crystallite sizes and micro-strain values could be observed for Pt/Y:TiO2-C sample, indicating a minimum impact of the rare earth element on Pt. Pt/C was prepared by the same method, and used as a reference catalyst. The strong-metal/support interaction (SMSI) effect induced by the photo-deposition method, in Pt/TiO2-C and Pt/Y:TiO2-C samples, was probed by CO-stripping, and associated to the enhanced stability toward the oxygen reduction reaction (ORR) in acid medium.
AB - Oxide-Carbon composites (TiO2-C) and yttrium-doped TiO2-C (Y:TiO2-C), synthesized via sol-gel route, were used as supports to photo-deposit platinum nanoparticles (Pt NPs). The physical-chemical properties of these materials were investigated by Transmission Electron Microscopy (TEM) and X-ray diffraction (XRD). The TEM images showed that Pt NPs were agglomerated and deposited onto oxide sites of the composites. Pt face-centered cubic, and TiO2 Anatase phases were identified on both Pt/TiO2-C and Pt/Y:TiO2-C samples. The particle size, stacking fault and micro-strain of Pt NPs were estimated by Williamson-Hall method. Compared with Pt/TiO2-C, similar stacking faults as well as increased crystallite sizes and micro-strain values could be observed for Pt/Y:TiO2-C sample, indicating a minimum impact of the rare earth element on Pt. Pt/C was prepared by the same method, and used as a reference catalyst. The strong-metal/support interaction (SMSI) effect induced by the photo-deposition method, in Pt/TiO2-C and Pt/Y:TiO2-C samples, was probed by CO-stripping, and associated to the enhanced stability toward the oxygen reduction reaction (ORR) in acid medium.
KW - Oxide-carbon composite
KW - Oxygen reduction reaction
KW - Platinum nanoparticles
KW - Strong metal-support interaction
UR - http://www.scopus.com/inward/record.url?scp=84955578926&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2016.01.030
DO - 10.1016/j.apcatb.2016.01.030
M3 - Artículo
SN - 0926-3373
VL - 187
SP - 291
EP - 300
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -