ANSWER:

You can recite these duas in all your prayers (Fard, sunnah, nafil etc) in sujood and in the last tashahhud, before making salam. 

QUESTION: Sheikh can I recite dua’s like : rabbi zidni ilma, rabbana aatina fidunya hassanatun wafilakhirati hassantun wakina azabannaar, allahumma inni asaluka ilman nafian wa rizqan tayyiban wa amalan mutaqabalan, ya muqallibal qulub thabbit qalbi aladinik, allahumma innaka afuwwun tuhibbul afwa fafu anni. In my fard and voluntary prayers ?