In addition to the specific surface area, surface topography and characteristics such as the pore size, pore size distribution, and micro/mesopores ratio are factors that determine the performance of porous carbons (PCs) in the fields of energy, catalysis, and adsorption. Based on the mechanism of weight loss of polyaspartic acid at high temperatures, this study provided a new method for adjusting the surface morphology of PCs by changing the cross-linking ratio of the precursor, where cross-linked polyaspartic acid was used as precursor without additional activating agents. N₂ adsorption analysis indicated that the specific surface area of the obtained PCs was as high as 1458 m²·g⁻¹, of which 1200 m²·g⁻¹ was the contribution of the microporous area and the highest pore volume was 1.13 cm³·g⁻¹, of which the micropore volume was 0.636 cm³·g⁻¹. The thermogravimetric analysis results of the precursor, and also the scanning electron microscopy and Brunauer—Emmet—Teller analysis results of the carbonization product confirmed that the prepared PCs presented multilevel pore structure, and the diameters of most pores were 0.78 and 3.97 nm; moreover, the pore size distribution was relatively uniform. This conferred the PCs the ultrahigh hydrogen adsorption capacity of up to 4.52 wt-% at 77 K and 1.13 bar, in addition to their great energy storage and catalytic potential.

除了比表面积之外，表面形貌和特性（例如孔径，孔径分布和微孔/中孔比率）也是决定多孔碳（PCs）在能量，催化和吸附领域的性能的因素。基于高温下聚天冬氨酸失重的机理，本研究提供了一种通过改变前体的交联比来调节PC表面形态的新方法，其中交联的聚天冬氨酸用作前体而无需添加活化剂。N ₂吸附分析表明，所得PC的比表面积高达1458 m ² ·g ^-1，其中1200 m ² ·g ^-1是微孔面积的贡献，最大孔体积为1.13cm ³ ·g ^-1，其中微孔体积为0.636cm ³ ·g ^-1。前驱物的热重分析结果，碳化产物的扫描电镜和Brunauer-Emmet-Teller分析结果证实，所制备的PC呈多级孔结构，大多数孔的直径分别为0.78和3.97 nm。此外，孔径分布相对均匀。这赋予了PC极高的氢吸附能力，在77 K和1.13 bar下的吸附能力高达4.52 wt％，此外还具有强大的储能和催化潜力。