(97%), glyceraldehyde (90%), methyl glycolate (98%), methyl lactate
(98%), pyruvic aldehyde (40 wt % in H2O), tartronic acid
(97%), gold(III) chloride hydrate (99.999%), poly(vinyl alcohol) (PVA,
MW 9000–10000, 80% hydrolyzed), sodium borohydride (99%), cetyltrimethylammonium
bromide (CTAB, 99%), tetraethyl orthosilicate (TEOS, 98%), tin chloride
pentahydrate (SnCl4·5H2O, 98%), urea (99.5%),
copper oxide, zinc oxide, zirconium oxide, titanium oxide (P25), and
niobium oxide were purchased from Sigma-Aldrich. Hydrotalcite (HT,
Mg/Al = 2) was kindly provided by Kisuma Chemicals BV. USY zeolite
(CBV600, Si/Al = 2.6) was purchased from Zeolyst. 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.