How do I figure out which Schottky diode to use?
A 'feature' of Schottky diodes is high reverse leakage (when compared to ordinary diodes).

The part you have chosen has 20mA of reverse leakage (max) at 100C ambient



In reverse, if you had that amount of leakage at that temperature, there would be up to 276mW of power dissipation in the device nd this would lead to a further 11 degrees of temperature rise. This would cause increased leakage.

In this particular case, the part does indeed look suitable provided you can live with a few mA of leakage.

You can see the exponential nature of leakage current vs. temperature for these devices in the graph from the datasheet:



Always check for the reverse performance for a Schottky device; under some reverse bias conditions, they can go into thermal runaway.