Solar fuel production from CO2 reduction in a self-biased hybrid solar-microbial device

Abstract Solar-driven carbon-based fuels production is a promising way to store solar energy and alleviate the greenhouse effect. However, current approaches face a lot of challenges, such as poor selectivity, high overpotential, and the requirement of external electrical bias. In this study, based on the photoelectrochemical and bioelectrochemical technologies, we reported a novel self-biased hybrid solar-microbial device, which was capable of converting solar energy into methane without external electrical bias. Owing to the self-generated bias (~0.47 V) from the bioanode and the low overpotential (