“…However, the salts applied to carbonation have different roles, for example, KOH, H 3 PO 4 , NaOH, and K 2 CO 3 are often used as chemical activators, salts such as KCl, ZnCl 2 , and LiCl tend to provide liquid reaction environments for biomass carbonation processes, while iron salts such as FeCl 3 , FeCl 2 , K 4 [Fe(CN) 6 ] and K 2 FeO 4 are considered as high-quality biomass preparation 2D-like graphene materials as a good template or catalyst. 108,109 The activation process of biomass is an effective way to increase the pore and specific surface area of carbon materials, and among the many activators, KOH has been widely studied for its ability to produce a great high specific surface area (B3000 m 2 g À1 ). The activation mechanism includes (1) first, a series of redox reactions of potassiumcontaining reagents (such as KOH, K 2 CO 3 , K 2 O) etching the carbon.…”