Zero-emission multivalorization of light alcohols with self-separable pure H2 fuel

• Self-separable H 2 fuel without forming CO x over 2D SnS/g-C 3 N 4 heterojunction. Selective redox-reactions enabled higher value-added liquid chemicals. Ultra-stable new-record efficiency in producing with low-cost catalyst. Sustainable constructive utilization of elements from alcohols. To reach Paris Agreement’s target 1.5 °C global temperature increase by 2100, low emission strategies are crucial. In synthetic chemistry, the phototransformation light alcohols (methanol, ethanol and iso-propanol) into hydrogen chemicals promises high potential utility value for industry. However, this process is often practiced using promoters (i.e. water, acid or base), several issues remained unsolved, e.g. water promoter induce emission; acid/base restrict catalyst selection, lead to complicated product purification cost increase. work, we report solar-driven promoter-free multivalorization self-separable gas/fuel based on two-dimensional (2D) The production reaches 1.27 mmol.g −1 . h ∼ 95 % recoverability. reduction occurs via a sequence redox reactions, combination disproportionation, as confirmed experimental analysis. This work demonstrates effectiveness heterojunctions promoter-free, zero-emission alcohol phototransformations.