Published online by Cambridge University Press: 09 February 2016
Development of a photoelectrochemical conversion device, operated at roomtemperature and ambient pressure with only ultraviolet radiation as an energysource is presented. We report a nanocomposite platform that combines aphotocatalyst and an electrocatalyst capable of reducing gaseous Carbon Dioxide,without using external electricity. The composite catalyst produces Methane fromCarbon Dioxide and atmospheric water vapor at an initial high conversion rate of2596 μL of CH4 per gram of catalyst per hour, which isamongst the highest reported. Our new approach offers a versatile solution toreduce the rising level of atmospheric Carbon Dioxide where a source of light isavailable.