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Showing 1–8 of 8 results
Advanced filters: Author: Hen Dotan Clear advanced filters

  • Conventionally, the two half reactions involved in water electrolysis occur simultaneously, presenting materials and process challenges. Here, the authors decouple these to split water efficiently in two steps: electrochemical hydrogen evolution, followed by spontaneous oxygen evolution at elevated temperature.

    • Hen Dotan
    • Avigail Landman
    • Gideon S. Grader
    Research
    Nature Energy
    Volume: 4, P: 786-795

  • Although the photogeneration yield spectrum is a key property for photoabsorbers in photovoltaic and photoelectrochemical cells, its characterization remains challenging. An empirical method to extract this parameter through quantum efficiency measurements of ultrathin films is proposed.

    • Daniel A. Grave
    • David S. Ellis
    • Avner Rothschild
    Research
    Nature Materials
    Volume: 20, P: 833-840

  • Solar water splitting is promising for hydrogen production and solar energy storage, but for large-scale utilization cost must be reduced. A membrane-free approach in separate oxygen and hydrogen cells brings water splitting closer to applications.

    • Avigail Landman
    • Hen Dotan
    • Avner Rothschild
    Research
    Nature Materials
    Volume: 16, P: 646-651

  • Assessing the effect of nanometre-scale structure on charge transport across micrometre-scale distances remains a fundamental challenge for many energy-conversion technologies. By correlating the structure and the charge transport with nanometre resolution across micrometre-scale distances, nanoparticle aggregates responsible for the high photoelectrochemical water-splitting activity of α-Fe2O3 electrodes are identified.

    • Scott C. Warren
    • Kislon Voïtchovsky
    • Michael Grätzel
    Research
    Nature Materials
    Volume: 12, P: 842-849

  • Photoelectrochemical water splitting uses solar power to decompose water to hydrogen and oxygen. Here, the authors integrate thylakoid membranes extracted from spinach into a bio-photo-electro-chemical cell capable of overall water splitting without the need for any sacrificial reagents.

    • Roy I. Pinhassi
    • Dan Kallmann
    • Avner Rothschild
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-10

  • Semiconductor photoelectrodes for solar hydrogen production by water photoelectrolysis require stable and abundant visible-light absorbers such as iron oxide. Although this material suffers from poor transport properties for efficient charge-carrier generation and collection, these drawbacks can now be addressed by using resonant light trapping in ultrathin films designed as optical cavities.

    • Hen Dotan
    • Ofer Kfir
    • Avner Rothschild
    Research
    Nature Materials
    Volume: 12, P: 158-164

  • Understanding fundamental processes that occur using solar-to-fuel conversion materials is crucial for constructing effective renewable energy collection. Here, authors find the hydrogen peroxide light-driven hole-scavenging mechanism over haematite to proceed with two active sites rather than one

    • Yotam Y. Avital
    • Hen Dotan
    • Arik Yochelis
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-10