PHOTOELECTROCHEMICAL METHODS FOR CONVERTING CARBON DIOXIDE INTO CARBON-CONTAINING REACTION PRODUCT

摘要

A method comprising: irradiating ultraviolet light on at least one solid composite electrode comprising at least one semiconductor material which is in contact with at least one liquid solution comprising carbon dioxide; switching the state of the solid composite electrode between an open circuit mode and a closed circuit mode during the irradiating step; wherein the carbon dioxide is reduced to form an elemental carbon-containing reaction product. Carbon dioxide is photoelectrochemically converted to an elemental carbon-containing reaction product including a carbon rich material which is at least 90 wt.% carbon. The form of the carbon material can be controlled by the time period in the switching step.