Hydronium model compatible with TIP4P

GROMACS version:
GROMACS modification: Yes/No
Here post your question

Hi,

I am looking for a hydronium force field which ideally would be compatible with the TIP4P model.
I don’t mind that the model overlooks Grotthuss mechanism, and I am not modelling PH. These ions will be used to neutralize a surface.

Thanks!
-Di