“…Syngas compositing of H 2 and CO, as an important feedstock in industry, is mainly derived from coal or natural gas, which are non-renewable resources. [97][98][99] CO 2 R potentially provided a more energy-efficient method to produce syngas with different ratios by adjusting the reaction environment, including the electrolyte and catalyst. [100][101][102][103][104][105][106] Among them, H 2 /CO with a ratio of 1 : 1, i.e., H 2 /CO (1 : 1) is suitable for the Fischer-Tropsch hydrocarbon synthesis, while H 2 /CO (2 : 1) can be used to synthesize formaldehyde via hydroformylation.…”