TY - JOUR
T1 - Fabrication of Transparent Pt-TiO2 Sol and Its Photocatalytic Activity for Hydrogen Evolution
AU - Nishiyama, Naoto
AU - Oono, Kyouhei
AU - Takeuchi, Hiroto
AU - Yukimoto, Mariko
AU - Takaguchi, Yutaka
N1 - Publisher Copyright:
© 2024 The Authors. Published by American Chemical Society.
PY - 2024/9/10
Y1 - 2024/9/10
N2 - Titanium dioxide doped with Pt(IV) ions was synthesized via a sol-gel method, incorporating a sol purification process through dialysis. The doped Pt(IV) ions were reduced by UV light irradiation to obtain a transparent Pt-TiO2 sol, with Pt(0) acting as a cocatalyst for hydrogen evolution. The hydrogen evolution activity of Pt-TiO2 sol was evaluated under UV light irradiation using methanol as a sacrificial reagent. 0.05 atom % Pt-TiO2 sol remained in the sol state without precipitation after 10 h of UV light irradiation. The amount of hydrogen produced after 10 h of light irradiation was 1195 μmol, with a turnover number (TON) of 664.1, a turnover frequency (TOF) of 66.4 h-1, and an apparent quantum yield (AQY) of 0.86%. The sol-gel synthesis from the molecular level is thought to result in Pt ions being doped inside the TiO2 particles, maintaining high dispersibility by suppressing particle growth due to the aggregation of Pt(0) during the UV reduction of Pt(IV) ions. These results show that the Pt-TiO2 photocatalyst has a high renewable energy factor because it can be synthesized at room temperature, and the aggregation of Pt-TiO2 particles is suppressed by making full use of a sol-gel method.
AB - Titanium dioxide doped with Pt(IV) ions was synthesized via a sol-gel method, incorporating a sol purification process through dialysis. The doped Pt(IV) ions were reduced by UV light irradiation to obtain a transparent Pt-TiO2 sol, with Pt(0) acting as a cocatalyst for hydrogen evolution. The hydrogen evolution activity of Pt-TiO2 sol was evaluated under UV light irradiation using methanol as a sacrificial reagent. 0.05 atom % Pt-TiO2 sol remained in the sol state without precipitation after 10 h of UV light irradiation. The amount of hydrogen produced after 10 h of light irradiation was 1195 μmol, with a turnover number (TON) of 664.1, a turnover frequency (TOF) of 66.4 h-1, and an apparent quantum yield (AQY) of 0.86%. The sol-gel synthesis from the molecular level is thought to result in Pt ions being doped inside the TiO2 particles, maintaining high dispersibility by suppressing particle growth due to the aggregation of Pt(0) during the UV reduction of Pt(IV) ions. These results show that the Pt-TiO2 photocatalyst has a high renewable energy factor because it can be synthesized at room temperature, and the aggregation of Pt-TiO2 particles is suppressed by making full use of a sol-gel method.
UR - http://www.scopus.com/inward/record.url?scp=85202704742&partnerID=8YFLogxK
U2 - 10.1021/acsomega.4c05671
DO - 10.1021/acsomega.4c05671
M3 - 学術論文
C2 - 39281926
AN - SCOPUS:85202704742
SN - 2470-1343
VL - 9
SP - 38180
EP - 38185
JO - ACS Omega
JF - ACS Omega
IS - 36
ER -