The diode looks more than adequate, however the Rds(on) of the mosfet at Vgs=4.5v is quoted for Id=5A. Also the Rds(on) is on the high side, given that you want the mosfet to pass 10A. Look for a mosfet with Rds(on) as low as possible (certainly below 50 milliohms), quoted at Vgs=4.5v and Id >= 10A.