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Title: Sunlight-Fueled, Low-Temperature Ru-Catalyzed Conversion of CO2 and H-2 to CH4 with a High Photon-to-Methane Efficiency
Authors: Sastre, Francesc
Versluis, Caroline
Meulendijks, Nicole
Rodriguez-Fernandez, Jessica
Sweelssen, Jorgen
Elen, Ken 
Van Bael, Marlies K. 
den Hartog, Tim
Verheijen, Marcel A.
Buskens, Pascal 
Issue Date: 2019
Source: ACS OMEGA, 4(4), p. 7369-7377
Abstract: Methane, which has a high energy storage density and is safely stored and transported in our existing infrastructure, can be produced through conversion of the undesired energy carrier H-2 with CO2. Methane production with standard transition-metal catalysts requires high-temperature activation (300-500 degrees C). Alternatively, semiconductor metal oxide photocatalysts can be used, but they require high-intensity UV light. Here, we report a Ru metal catalyst that facilitates methanation below 250 degrees C using sunlight as an energy source. Although at low solar intensity (1 sun) the activity of the Ru catalyst is mainly attributed to thermal effects, we identified a large nonthermal contribution at slightly elevated intensities (5.7 and 8.5 sun) resulting in a high photon-to-methane efficiency of up to 55% over the whole solar spectrum. We attribute the excellent sunlight-harvesting ability of the catalyst and the high photon-to-methane efficiency to its UV-vis-NIR plasmonic absorption. Our highly efficient conversion of H-2 to methane is a promising technology to simultaneously accelerate the energy transition and reduce CO2 emissions.
Notes: [Sastre, Francesc; Versluis, Caroline; Meulendijks, Nicole; Rodriguez-Fernandez, Jessica; Sweelssen, Jorgen; den Hartog, Tim; Buskens, Pascal] Netherlands Org Appl Sci Res TNO, High Tech Campus 25, NL-5656 AE Eindhoven, Netherlands. [Elen, Ken; Van Bael, Marlies K.; Buskens, Pascal] Hasselt Univ, Inst Mat Res Inorgan & Phys Chem, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium. [Elen, Ken; Van Bael, Marlies K.] IMEC Vzw, IMOMEC Associated Lab, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. [den Hartog, Tim; Buskens, Pascal] Zuyd Univ Appl Sci, Nieuw Eyckholt 300, NL-6400 AN Heerlen, Netherlands. [Verheijen, Marcel A.] Philips Innovat Labs, High Tech Campus 11, NL-5656 AE Eindhoven, Netherlands. [Verheijen, Marcel A.] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands.
Keywords: Photocatalytic Conversion;Room-Temperature;Reduction;Hydrogenation;Future
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ISSN: 2470-1343
e-ISSN: 2470-1343
DOI: 10.1021/acsomega.9b00581
ISI #: 000466552500138
Category: A1
Type: Journal Contribution
Validations: ecoom 2020
Appears in Collections:Research publications

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