Recently, Xiao et al. reported an enhanced methane hydrate formation in "active ice". Here, "active ice" was referred to the powdered ice particles whose surfaces were impurified by surfactants such as sodium dodecyl sulfate (SDS). The "active ice" was found to exhibit a superior capability of encapsulating methane compared to pristine ice under similar experimental conditions. The authors explained the accelerated methane encapsulation in active ice based on the classical concept of surfaceactive function of surfactants, following the well-known promoting effect of surfactants on gas hydrate formation in aqueous solutions. Nevertheless, this classical point of view on the solution chemistry of surfactants cannot elucidate the above-discussed promoting effects of antifreezers on gas encapsulation in ice. Those antifreezers (e.g., methanol, ammonia, HClO 4 ) are not surfactants yet those could exhibit promoting effects on gas encapsulation in ice. Hence, the available literature on the one hand informs the beneficial role of dopants (in either ice or the gas phase) as an enabler of fast gas enclathration in ice; on the other hand, ascertains the unexplored microscopic origin behind such peculiar beneficial effects of dopants.