He 'devoted' [='dedicated'] his life/time 'to' helping the poor. = He 'devoted himself to' helping the poor. [=he used his time, energy, etc., to help the poor]
The author's 'devoted' [='loyal, faithful'] readers have been eagerly waiting for the new book.
Some of the money they raise will be 'devoted to' repairing the church's roof.
(..) the Arctic Circle. Yeah, the entire lab, just... Gone. Where did it go? I don't care. Hmm. The lab was devoted to experiments involving PX-, a transmutation serum. What is PX-, you ask? Mmm, it's pretty bad. Look. Ah! (..)2013 Despicable Me 2