nominate someone as something
to suggest someone to be the candidate to serve as something. I would like to nominate Karen as our representative. She nominated herself as the one most likely to do the job.
nominate someone for something
to suggest someone as a candidate for a particular office. I will nominate Carolyn for president. You cannot nominate yourself for this office.
nominate someone to something
to suggest someone to become a member of a group. I am the one who nominated her to the board. The president nominated herself to the position of chairman of the board.