ИСТИНА

A known efficient adsorbent AX-21 was produced by oxidation of carbon containing materials – coals and cokes by nitric acid, mixing of formed aromatic acids with hydroxides of metals of Groups Ia and IIa of the Periodic Table and pyrolysis of the mixture in the inert atmosphere at 700-900C [1, 2]. We have developed a different method of the adsorbent preparation [3], in which, instead of oxidation with nitric acid, sulfurization of the precursor with concentrated sulfuric acid was used. The obtained material has similar characteristics and in accordance with the present day terminology is regarded as a nanoporous carbon material. It was established that this nanoporous carbon material, depending on the duration or temperature of the carbonization, had either one-dimensional or three-dimensional hopping conductivity with variable hop length, described by the Mott law. Possibility of low temperature (400-900C) graphitization of the material with one-dimensional conductivity was shown. The use of the nanoporous material for stabilization of nanoparicles of 3d metals of iron group was demonstrated. The magnetometric measurements showed that the metal particles were in the ferromagnetic state and were characterized by a high field of the local magnetic anisotropy. High potential of the use of this nanoporous carbon material as the support for PEMFC cathode catalysts was demonstrated. 1. US Patent No 3624004. 2. US Patent No 4082694. 3. RU Patent No 2206394.