< Terug naar vorige pagina
Publicatie
Sunlight-Fueled, Low-Temperature Ru Catalyzed Conversion of CO2 and H2 to CH4 with a High Photon to Methane Efficiency
Tijdschriftbijdrage - Tijdschriftartikel
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 H2
with CO2. Methane production with standard transition metal catalysts requires high
temperature activation (300-500 °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 °C using sunlight as energy source. Whilst at low solar
intensity (1 sun) the activity of the Ru catalyst is mainly attributed to thermal effects, we
identified a large non-thermal contribution at slightly elevated intensities (5.7 and 8.5 sun)
resulting in a high photon to methane efficiency 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 H2 to
methane is a promising technology to simultaneously accelerate the energy transition and
reduce CO2 emissions.
Tijdschrift: ACS Omega
ISSN: 2470-1343
Issue: 4
Volume: 4
Pagina's: 7369 - 7377
Jaar van publicatie:2019
Trefwoorden:Catalysts, Light, Nanoparticles, Physical and chemical processes, Plasmons