Molecular Z-Scheme for Solar Fuel Production via Dual Photocatalytic Cycles.
J Am Chem Soc
; 144(47): 21568-21575, 2022 11 30.
Article
in En
| MEDLINE
| ID: mdl-36394978
ABSTRACT
Natural photosynthesis uses an array of molecular structures in a multiphoton Z-scheme for the conversion of light energy into chemical bonds (i.e., solar fuels). Here, we show that upon excitation of both a molecular photocatalyst (PC) and a substituted naphthol (ROH) in the presence of a sacrificial electron donor and proton source, we achieve photocatalytic synthesis of H2. Data support a multiphoton mechanism that is catalytic with respect to both PC and ROH. The use of a naphthol molecule as both a light absorber and H2 producing catalyst is a unique motif for Z-scheme systems. This molecular Z-scheme can drive a reaction that is uphill by 511 kJ mol-1 and circumvents the high-energy constraints associated with the reduction of weak acids in their ground state, thus offering a new paradigm for the production of solar fuels.
Full text:
1
Database:
MEDLINE
Main subject:
Photosynthesis
/
Naphthols
Language:
En
Year:
2022
Type:
Article