Naturally Occurring Laver‐Derived Alkali Metal‐Doped Carbon Material Enabled Efficient Transesterification of Biomass‐Derived Alcohols and Diethyl Carbonate

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ABSTRACT Transesterification of symmetrical organic carbonates and alcohols has garnered significant interest because this strategy is eco‐friendly to access asymmetric organic carbonates (AOCs) widely applied in diverse fields. Environmental‐benign, and cost‐effective catalytic materials with high activity are highly desirable for promoting this transformation. Herein, several carbon materials (denoted as LC‐T, where T represented the pyrolysis temperature) doped with alkali metal (K + or Na + ) were fabricated by the pyrolysis of naturally occurring laver. Interestingly, the synthesized LC‐900 exhibited excellent catalytic activity for the transesterification of diethyl carbonate (DEC) with various biomass‐derived alcohols (except for menthol with high steric hindrance) to synthesize the corresponding AOCs with high selectivities (>98%) at 130°C. Systematic investigation revealed that alkali metal (K + and Na + ) phenolates probably acted as the catalytically active sites, and the synergistic effect between strong basic sites and high surface area contributed to the excellent catalytic activity of the LC‐900 material. Importantly, this work combined utilization of naturally occurring raw materials to fabricate functional catalytic materials with upgrading of biomass‐derived alcohols, enabling it to be highly promising in practical applications.

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