“…In the past 170 years, human activities have been responsible for almost all of the rapid increase in CO 2 emissions, which has been linked to global climate change and ocean acidification (Figure 1A). 1,2 Strategies such as CO 2 capture and catalytic conversion have been proposed to mitigate CO 2 emissions. Among the latter strategy, thermocatalytic CO 2 hydrogenation 3,4 provides a wide variety of products, such as CO, methane, methanol, olefins, ethers, and aromatics, whereas the CO 2 mitigation efficiency depends on the source of H 2 ; electrocatalytic CO 2 reduction using water-derived protons is the subject of many recent studies due to its promise in the production of value-added chemicals, [5][6][7] such as syngas (CO and H 2 ), formate, alkanes, olefins, and alcohols, although it is still far from competing with conventional processes.…”