Program and book of abstracts 1st conference

October 17 th – 20 th , 2022, Congress Centre of Slovak Academy of Sciences, Smolenice castle, Slovakia

Matolin Vladimir

He graduated from the Faculty of Mathematics and Physics of the Charles University (CU) in Prague, he received PhD degree at the Univ. Aix-Marseille in 1987. He completed his habilitation at CU in 1991, in 1995 he received the rank of Doctor of Sciences and in 1997, he was appointed professor at CU. He is professionally focused on the physics of surfaces and nanotechnology. He is the author or co-author of 424 articles according to WoS. 8300 citations have been recorded for his works. He is the author of 7 patents. In the years 1997-2007, he held the position of head of the Department of Surface and Plasma Physics of CU, since 2002 he has been the head of the materials Science Beamline of

the Elettra synchrotron in Trieste. He was often invited to important stays abroad, e.g. assistant professor at the Univ. Aix Marseille (1983-1987, 1990-1992), Professor at the Univ. Blaise Pascal in France 1993 2001, scientific advisor at NIMS in Tsukuba, Japan (8 months in 2004). In 2002 he was awarded an honorary doctorate by the University of Blaise Pascal in France, and in the same year he was awarded the "Chevalier dans l'Ordre des Palmes Academiques" by the French government. In 2019, he was awarded an honorary doctorate from the National University in Uzhgorod. HYDROGEN INHALERS: PRINCIPLE, DESIGN AND SAFETY FEATURES Vladimír Matolín 1,2 The most of hydrogen generators produce hydrogen with a purity of 99.999% by decomposing water with a PEMWE type electrolyzer based on a proton exchange membrane. PEMWE based hydrogen generators use a platinum and iridium catalyst and PEM membrane technology. PEMWE electrolysis splits pure deionized water (H 2 O) into its components, hydrogen (H 2 ) and oxygen (O 2 ), on both sides of the membrane. When DC voltage is applied to the electrolyzer, protons (H+ ions) pass through the PEM to the cathode, or hydrogen electrode, where they meet electrons from the other side of the circuit and are reduced to hydrogen gas. The two reactions that take place in the cell are as follows: 1. 2H 2 O → 4H+ + 4e- +O 2 2. 4H+ + 4e- → 2H 2 The device is operated by control electronics. With a maximum output capacity of 300 ml H2/min, one generator can supply gas for simultaneously saturating water with molecular hydrogen and inhaling it using a nasal cannula. The control system continuously monitors key operating parameters to ensure operation and performance. Built-in sensors shut down the generator in case of low water level or overpressure in the hydrogen or oxygen/ water branch. The produced hydrogen contains drops of water, which should be separated from the gas phase using a gas separator. A hydrogen generator is a potentially explosive device because it generates highly flammable and oxidizing gases. For this reason, it is necessary that the device is assessed 1 LEANCAT s.r.o., Praha, Czech Republic 2 Charles University, Prague, Czech Republic

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