Krzysztof Stolarczyk obtained M.Sc. in chemistry in 2000 at Faculty of Chemistry, University of Warsaw, Poland. In 2006 defended doctoral thesis at Faculty of Chemistry, University of Warsaw, Poland (Ph.D.). In 2019, received a postdoctoral degree (habilitation) at Faculty of Chemistry, University of Warsaw, Poland. Ph.D., D.Sc. Krzysztof Stolarczyk has over 20 years of professional experience in: - construction of bioelectrochemical, enzyme-based oxygen detection systems, - designing new bioelectrochemical systems containing enzymes for applications in biofuel cells and sensors, - design and use of self-powered measuring systems, such as a potentiostat with a sensor, for monitoring chemical compounds in the environment or living organisms, - application of enzymes in fuel cell technology, design of hybrid systems, enzymatic fuel cells and supercapacitors, - use of gold nanoparticles as drug carriers, - studies of the catalytic activity of enzymes adsorbed on particles, - design and application of diffusion electrodes for gases, - studies of electron transfer mechanisms, - synthesis and study of the properties of metal nanoparticles, mainly gold and platinum nanoparticles used as catalysts and in the construction of fuel cells and sensors.