Bias-free solar hydrogen production at 19.8 mA cm<sup>-2</sup> using perovskite photocathode and lignocellulosic biomass.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 36192405.
- Also identified by DOI 10.1038/s41467-022-33435-1 and PMC identifier 9529942.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Solar hydrogen production is one of the ultimate technologies needed to realize a carbon-neutral, sustainable society. However, an energy-intensive water oxidation half-reaction together with the poor performance of conventional inorganic photocatalysts have been big hurdles for practical solar hydrogen production. Here we present a photoelectrochemical cell with a record high photocurrent density of 19.8 mA cm<sup>-2</sup> for hydrogen production by utilizing a high-performance organic-inorganic halide perovskite as a panchromatic absorber and lignocellulosic biomass as an alternative source of electrons working at lower potentials. In addition, value-added chemicals such as vanillin and acetovanillone are produced via the selective depolymerization of lignin in lignocellulosic biomass while cellulose remains close to intact for further utilization. This study paves the way to improve solar hydrogen productivity and simultaneously realize the effective use of lignocellulosic biomass.
Medical subject headings
- Cellulose
- Lignin