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Theoretical efficiency limits of photoelectrochemical CO2 reduction: A route‐dependent thermodynamic analysis
journal contributionposted on 2020-05-04, 11:05 authored by Evangelos Kalamaras, Huizhi Wang, M Mercedes Maroto‐Valer, John M Andresen, Jin Xuan
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Solar-fuel formation via photoelectrochemical (PEC) routes using water and CO2 as feedstock has attracted much attention. Most PEC CO2 reduction studies have been focused on the development of novel photoactive materials; however, there is still a lack of understanding of the key limiting factors of this process. In this study, the theoretical limits of Solar-to-Fuel (STF) efficiencies of single- and dual-junction photo-absorbing materials are illustrated for single-step multi-electron CO2 reduction into fuels including HCOO−, CO, CH3OH and C2H5OH. It is also highlighted that STF efficiency depends on the route of two-step PEC CO2 reduction process using CH3OH as a model fuel. Finally, it is illustrated the beneficial role of alternative strategies such as dual-junction photo-absorbing electrodes, externally applied bias and subsequent reactor chambers on the maximum theoretical efficiencies of PEC CO2 reduction.
Engineering and Physical Sciences Research Council (EPSRC). Grant Numbers: EP/K021796/1, EP/N009924/1, EP/R012164/2
- Aeronautical, Automotive, Chemical and Materials Engineering
- Chemical Engineering
Pages232 - 239
CitationKalamaras, E. ... et al., 2020. Theoretical Efficiency Limits of Photoelectrochemical CO2 Reduction: A Route-Dependent Thermodynamic Analysis. ChemPhysChem, 21(3), pp. 232-239.
- AM (Accepted Manuscript)
Rights holder© Wiley
Publisher statementThis is the peer reviewed version of the following article: Kalamaras, E. ... et al., 2020. Theoretical Efficiency Limits of Photoelectrochemical CO2 Reduction: A Route-Dependent Thermodynamic Analysis. ChemPhysChem, 21(3), pp. 232-239, which has been published in final form at https://doi.org/10.1002/cphc.201901041. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions
DepositorProf Jin Xuan . Deposit date: 4 May 2020
CategoriesNo categories selected
CO2 reductionenergy conversionphotoelectrochemistrysemiconductorssolar fuelsScience & TechnologyPhysical SciencesChemistry, PhysicalPhysics, Atomic, Molecular & ChemicalChemistryPhysicsCARBON-DIOXIDESOLAR FUELSPERFORMANCE LIMITSCURRENT STATEWATERCONVERSIONCELLSTIO2PHOTOCATALYSTSSIMULATIONSChemical PhysicsPhysical Chemistry (incl. Structural)Atomic, Molecular, Nuclear, Particle and Plasma PhysicsTheoretical and Computational Chemistry