Hydrogen Spillover and Storage on Graphene with Single-Site Ti Catalysts

Hydrogen spillover and storage for single-site metal catalysts, including single-atom catalysts (SACs) single nanocluster have been elucidated various supports but remain poorly understood inert carbon supports. Here, we use synchrotron radiation-based methods to investigate the role of Ti on graphene hydrogen storage. Our in-situ angle-resolved photoemission spectra results demonstrate a bandgap opening X-ray absorption reveal formation C-H bonds, both indicating partial hydrogenation. With increasing deposition H2 exposure, atoms tend aggregate form yield 13.5% sp3-hybridized corresponding hydrogen-storage capacity 1.11 wt% (excluding weight nanoclusters [1]). how simple process at SACs can lead covalent bonding graphene, thereby providing strategy rational design carbon-supported catalysts.