Hydrogen spillover is the dynamic motion of surface-adsorbed hydrogen species from hydrogen-abundant areas to hydrogen-weak areas. It has a significant position to play in quite a few hydrogen-involved response processes.
Schematic of high-pressure scanning tunneling microscopy (HP-STM) utilizing an STM tip to probe the hydrogen spillover on MnO and Mn3O4 surfaces within the H2 environment. Picture Credit score: Rentao Mu and Yijing Liu.
To enhance the catalytic efficiency of hydrogen-involving reactions, it’s essential to understand the total mechanism of hydrogen spillover and expose how hydrogen strikes and what facets regulate hydrogen conductivity on strong surfaces.
Lately, a workforce of researchers headed by Prof. Rentao Mu and Prof. Qiang Fu from the Dalian Institute of Chemical Physics (DICP) of the Chinese language Academy of Sciences (CAS) straight witnessed the rushing up of hydrogen spillover via the surface-lattice-confinement impact. This research was revealed within the journal Nature Communications on February 4th, 2023.
The scientists constructed stripe-like MnO(001) and grid-like Mn3O4(001) monolayers on a Pt(111) substrate and examined their hydrogen spillover. They discovered that hydrogen species from Pt unfold unidirectionally alongside the stripes on MnO(001), whereas it displayed an isotropic pathway on Mn3O4(001).
Moreover, by using dynamic floor imaging within the H2 environment, they uncovered that hydrogen unfold 4 occasions extra shortly on MnO than within the case on Mn3O4, which was stimulated by the one-dimension surface-lattice-confinement impact.
Theoretical calculations confirmed that a fair and medium O-O distance was splendid for hydrogen diffusion whereas low-coordinate floor O atom blocked it.
Our research illustrates the surface-lattice-confinement impact of oxide catalysts on hydrogen spillover and offers a promising route to enhance the hydrogen spillover effectivity.
Qiang Fu, Professor, Dalian Institute of Chemical Physics, Chinese language Academy of Sciences
Journal Reference
Liu, Y., et al. (2023) Direct statement of accelerating hydrogen spillover through surface-lattice-confinement impact. Nature Communications. doi.org/10.1038/s41467-023-36044-8.
Supply: http://english.dicp.cas.cn/
