Back to Search
Start Over
Can Half-a-Monolayer of Pt Simulate Activity Like That of Bulk Pt? Solar Hydrogen Activity Demonstration with Quasi-artificial Leaf Device.
- Source :
-
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2020 Jul 08; Vol. 12 (27), pp. 30420-30430. Date of Electronic Publication: 2020 Jun 25. - Publication Year :
- 2020
-
Abstract
- Pt is the best cocatalyst for hydrogen production. It is also well-known that the surface atomic layer is critical for catalysis. To minimize the Pt content as cocatalyst, herein we report on half-a-monolayer of Pt (0.5θ <subscript>Pt</subscript> ) decorated on earth-abundant Ni-Cu cocatalyst, which is integrated with a quasi-artificial leaf (QuAL) device (TiO <subscript>2</subscript> /ZnS/CdS) and demonstrated for efficient solar hydrogen production. For the QuAL, TiO <subscript>2</subscript> is sensitized with ZnS and CdS quantum dots by the SILAR method. The 0.5θ <subscript>Pt</subscript> -decorated Ni-Cu shows an onset potential of 0.05 V vs reversible hydrogen electrode for the hydrogen evolution reaction, which is almost similar to that of commercial Pt/C. Photoactivity of the present QuAL device with either bulk Pt or 0.5θ <subscript>Pt</subscript> -coated Ni-Cu cocatalyst is, surprisingly, equal. Our findings underscore that a fraction of a monolayer of Pt can enhance the activity of the cocatalyst, and it is worth exploring further for the high activity associated with atomic Pt and other noble metals.
Details
- Language :
- English
- ISSN :
- 1944-8252
- Volume :
- 12
- Issue :
- 27
- Database :
- MEDLINE
- Journal :
- ACS applied materials & interfaces
- Publication Type :
- Academic Journal
- Accession number :
- 32531153
- Full Text :
- https://doi.org/10.1021/acsami.0c07431