Using Protection Layers for a 2-Photon Water Splitting Device

Brian Seger, Bastian Timo Mei, Rasmus Frydendal, Anastatia Permyakova, Dowon Bae, Thomas Pedersen, Ivano Eligio Castelli, Paolo Malacrida, Peter Christian Kjærgaard Vesborg, Ifan E. L. Stephens, Ole Hansen, Karsten Wedel Jacobsen, Ib Chorkendorff

Research output: Contribution to journalConference abstract in journalResearchpeer-review

Abstract

The 2-photon tandem device for photocatalytic water splitting has been theoretically shown to provide a higher efficiency than a single photon device(1). This increased efficiency can be achieved by having one material optimized to absorb high energy photons (large bandgap) and another material optimized to absorb low energy photons (small bandgap). To a large degree this approach has been hindered by corrosion issues. In this talk I will first discuss how our computational screening of 2,400 materials showed that very few materials can efficiently absorb light without corroding in water splitting conditions.(2) I will follow this up by discussing how protection layers bypass the corrosion issue by creating a buffer layer.(3) Finally I will show how we integrated a photocatalyst/protection layer/(co-catalyst) scheme to produce highly efficient H2 evolution photocathodes and O2 evolution photoanodes.(3, 4) 1. A. B. Laursen, S. Kegnaes, S. Dahl and I. Chorkendorff, Energy & Environmental Science, 5 (2012). 2. B. Seger, I. E. Castelli, P. C. K. Vesborg, K. W. Jacobsen, O. Hansen and I. Chorkendorff, Energy & Environmental Science, 7, 2397 (2014). 3. B. Seger, T. Pedersen, A. B. Laursen, P. C. K. Vesborg, O. Hansen and I. Chorkendorff, Journal of the American Chemical Society, 135, 1057 (2013). 4. B. Mei, A. A. Permyakova, R. Frydendal, D. Bae, T. Pedersen, P. Malacrida, O. Hansen, I. E. L. Stephens, P. C. K. Vesborg, B. Seger and I. Chorkendorff, The Journal of Physical Chemistry Letters, 5, 3456 (2014). [Figure]
Original languageEnglish
Article number2016
JournalElectrochemical Society. Meeting Abstracts (Online)
VolumeMA2015-01
Issue number37
Number of pages1
ISSN2151-2043
Publication statusPublished - 2015
Event227th ECS Meeting - Chicago, IL, United States
Duration: 24 May 201528 May 2015

Conference

Conference227th ECS Meeting
CountryUnited States
CityChicago, IL
Period24/05/201528/05/2015

Keywords

  • Exploratory Approaches for Solar Fuel Generation - May 27 2015 10:00AM

Fingerprint Dive into the research topics of 'Using Protection Layers for a 2-Photon Water Splitting Device'. Together they form a unique fingerprint.

Cite this