The PhD thesis "Lignocellulose based nanoporous carbon materials for fuel cells" is devoted to the synthesis of nitrogen-doped nanoporous carbon materials from wood and its processing residues using a three-stage obtaining process (carbonisation, chemical activation, nitrogen doping) and to study structure and properties of the obtained carbon materials for use as oxygen reduction catalysts in fuel cells. The thesis contains an Introduction, Literature Review, Experimental part, Discussion of Results, Conclusions, List of References, and Appendices. The literature review summarises the literature on the methods of obtaining and analysing nitrogen-doped activated carbon, their structure and properties, as well as the structure and operating principles of fuel cells. The second part describes raw materials, chosen methods and procedures of nitrogen-doped activated carbon synthesis, and methods of testing used to achieve the goals and tasks of the thesis. The third chapter analyses and summarises the experimental results. The influence of carbonisation environment on the formation of carbon material structure, the porous structure properties of activated carbon depending on the thermochemical activation conditions (temperature, alkali content) and starting material, as well as changes in nitrogen content and form depending on starting materials and their processing methods have been studied. The relationship between the parameters of the porous structure, the nitrogen content and its form, as well as the oxygen reduction reaction on the catalyst surface, was shown in the work. The basics of original technology for obtaining nitrogen-doped activated carbon from activated carbon produced in Latvia have been developed. The Doctoral Thesis has been written in Latvian. It consists of an Introduction; 4 Chapters; Conclusion; 41 figures; 20 tables; the total number of pages is 92, not including appendices. The Bibliography contains 183 titles.