Dye-sensitized photocathodes for oxygen reduction: efficient H₂O₂ production and aprotic redox reactions.

ABSTRACT: Dye-sensitized photoelectrochemical cells (DSPECs) can be used to store solar energy in the form of chemical bonds. Hydrogen peroxide (H₂O₂) is a versatile energy carrier and can be produced by reduction of O₂ on a dye-sensitized photocathode, in which the design of dye molecules is crucial for the conversion efficiency and electrode stability. Herein, using a hydrophobic donor-double-acceptor dye (denoted as BH4) sensitized NiO photocathode, hydrogen peroxide (H₂O₂) can be produced efficiently by reducing O₂ with current density up to 600 μA cm^-2 under 1 sun conditions (Xe lamp as sunlight simulator, λ > 400 nm). The DSPECs maintain currents greater than 200 μA cm^-2 at low overpotential (0.42 V

SUBMITTER: Sun J 

PROVIDER: S-EPMC6544122 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature