High-flux solar-driven thermochemical dissociation of CO2 and H2O using nonstoichiometric ceria

摘要: Because solar energy is available in large excess relative to current rates of consumption, effective conversion this renewable yet intermittent resource into a transportable and dispatchable chemical fuel may ensure the goal sustainable future. However, low conversion efficiencies, particularly with CO_2 reduction, as well utilization precious materials have limited practical generation fuels. By using cavity-receiver reactor, we combined oxygen uptake and release capacity cerium oxide facile catalysis at elevated temperatures thermochemically dissociate H_2O, yielding CO H_2, respectively. Stable rapid was demonstrated over 500 cycles. Solar-to-fuel efficiencies 0.7 0.8% were achieved shown be largely by system scale and design rather than chemistry.