(97%), glyceraldehyde (90%), glycolic acid (99%), lactic acid (98%),
pyruvic aldehyde (40 wt % in H2O), cyclohexene (99%), cyclohexane
(99.5%), sodium hydroxide (98%), benzene (99.9%), hexachloroplatinic
acid (H2PtCl6·xH2O, 99.9%), zirconium oxide (nanopowder, <100 nm), cerium oxide
(nanopowder), and titanium oxide (P25) were purchased from Sigma-Aldrich.
Glyceric acid (20 wt % in H2O) was purchased from TCI Chemicals.
The H2O used in this work was always of Milli-Q grade.
All chemicals were used without further purification.