Porous carbon has been constructed in various strategies for hydrogen storage. In this work, a simple-effective strategy was proposed to transform sustainable biomass into porous carbon by degrade partial lignin and hemicellulose with Na₂SO₃ and NaOH aqueous mixture. This method collapses the biomass structure to provide more active sites, and also avoid the generation and accumulation of non-porous carbon nanosheets. As a result, the as-prepared sample possesses high specific surface area (2849 m² g⁻¹) and large pore volume (1.08 cm³ g⁻¹) concentrating almost completely on micropore. Benefit to these characteristics, the as-prepared sample exhibits appealing hydrogen storage capacity of 3.01 wt% at 77 K, 1 bar and 0.85 wt% at 298 K, 50 bar. The isosteric heat of hydrogen adsorption is as high as 8.0 kJ mol⁻¹, which is superior to the most biochars. This strategy is of great significance to the conversion of biomass and the preparation of high-performance hydrogen storage materials.

多孔碳已经以各种氢存储策略构建。在这项工作中，提出了一种简单有效的策略，即通过用Na ₂ SO ₃和NaOH混合水溶液降解部分木质素和半纤维素，将可持续的生物质转化为多孔碳。该方法破坏了生物质结构以提供更多的活性位点，并且还避免了无孔碳纳米片的产生和积累。结果，所制备的样品具有高的比表面积（2849 m ²  g ^-1）和大的孔体积（1.08 cm ³  g ^-1））几乎完全集中在微孔上。得益于这些特性，所制备的样品在77 K（1巴）下具有3.01 wt％的吸引力储氢容量，在298 K（50 bar）下具有0.85 wt％的吸引力储氢量。氢吸附的等排热高达8.0 kJ mol ^-1，优于大多数生物炭。该策略对生物质转化和高性能储氢材料的制备具有重要意义。