Catalyst

code

Catalyst

composition

Precursor

ALH 28

HfO₂

HfCl₄

ALH 29

${\text{HfO}}_{\text{2}}/{\text{SO}}_4^{2-}$ (0.5 M)

HfCl₄

ALH 30

${\text{HfO}}_{\text{2}}/{\text{SO}}_4^{2-}$ (1 M)

HfCl₄

ALH 31

HfO₂/Nb (3%)

HfCl₄

ALH 32

HfO₂/Nb (5%)

HfCl₄