Table 1 Acidity of aqueous carbon solutions: f = pH - pOH

From: Nanoconfinement facilitates reactions of carbon dioxide in supercritical water

T

Confinement

f

1000 K

Graphene

−1.24 ± 0.02

Stishovite

−1.46 ± 0.02

1400 K

Graphene

−0.94 ± 0.05

Stishovite

−1.13 ± 0.03

  1. The initial mole fraction of CO2(aq) is 0.185, and the pressure is ~10 GPa. Uncertainties are obtained using the blocking method68.