(a)
(b)
Figure 12:
DOS of
𝑑
𝑥
2
𝑦
2
and
𝑝
𝑦
of the metals for Au-GSW;
𝑑
𝑧
2
and
𝑝
𝑦
for Pt-GSW with and without H.
𝑝
𝑦
of the metals is empty in the absence of hydrogen, and becomes occupied when hydrogen adsorbs.