We apply these to three different systems: Pt 13 , Pt 13 H 2 , and Pt 13 H 4 . We subdivide the hydrogenated systems between those generated using the in-sphere methodology, denoted from here as Pt 13 H 2 and Pt 13 H 4 , and those generated using the on-surface methodology, denoted from here as Pt 13 + H 2 and Pt 13 + 2 H 2 (c.f. section 2.3 for differences). Each structure was run for 10000 pyGlobOpt iterations using 10 bees. The GM found during the Pt 13 run was used as the base structure for the on-surface methodologies.