Carbon fibers (CFs) with unique physicochemical properties have been considered as a sustainable material for use as a catalytic support for hydrogen evolution reaction (HER). Porous carbon microfibers (PCFs) were generated by utilizing the needle less electrospinning technology (NLE). The first approach involved the formation of porosity in precursor polyacrylonitrile/polyvinylpirolidone (PAN/PVP) fibers by washing out PVP and carbonization of remaining PAN. Although the sufficient porosity was achieved with increasing PVP content, the total bulk porosity was lost. The second approach was simple removal of PVP, based on different polymer degradation process at high temperatures. The most efficient way was utilization of sodium dodecyl sulphate (SDS) as an anionic surfactant. Binding SDS on PVP polymer chain caused the formation of micelles, which formed regular porous structures in the fibrous carbon matrix after carbonization. The formation of porosity and electrocatalytic activity of CFs after carbonization in Ar and H2 reduction atmosphere were studied. The electrocatalytic results have pointed out that the composition of precursor fibers PAN/PVP/SDS heat treated without previous preoxidation process, carbonized in Ar atmosphere and followed in H2 atmosphere can be efficiently used as a porous material platform for different modification and further application as a potential electrocatalysts for HER.

中文翻译：

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多孔碳纤维可有效析氢


具有独特物理化学性质的碳纤维（CF）被认为是一种可持续材料，可用作析氢反应（HER）的催化载体。利用无针静电纺丝技术（NLE）生成多孔碳微纤维（PCF）。第一种方法涉及通过洗掉 PVP 并碳化剩余的 PAN，在前体聚丙烯腈/聚乙烯吡咯烷酮 (PAN/PVP) 纤维中形成孔隙。尽管随着 PVP 含量的增加获得了足够的孔隙率，但总体孔隙率却损失了。第二种方法是基于不同的聚合物在高温下的降解过程，简单去除 PVP。最有效的方法是使用十二烷基硫酸钠（SDS）作为阴离子表面活性剂。 SDS与PVP聚合物链结合引起胶束的形成，胶束在碳化后在纤维碳基质中形成规则的多孔结构。研究了CFs在Ar和H2还原气氛中碳化后的孔隙率形成和电催化活性。电催化结果表明，前体纤维PAN/PVP/SDS未经预氧化过程热处理、在Ar气氛中碳化、然后在H2气氛中的组合物可以有效地用作多孔材料平台，用于不同的改性和进一步作为多孔材料的应用。 HER 的潜在电催化剂。