“…The papers in this Collection include methods to accelerate the fuel-forming reaction and mitigate detrimental charge recombination. − Insights from density functional theory have revealed important mechanistic information that could support future design of photocatalysts . Several papers illustrate how heterostructures combining semiconductors can enhance charge-separation and improve the performance above what can be achieved with a single material. − Several demonstrate how recent advances in emerging photovoltaic technology can be applied to enhance solar light harvesting and drive photocatalysis, which are essential to reach high photoconversion efficiencies. − …”