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X-ray Absorpton Spectroscopy Study on Hydrogen Recombination Catalysts of Palladium Nanoparticles on Titanium Oxide under Wet Condition

Abstract

Hydrogen recombination catalyst is useful tool for reducing hydrogen in closed area. The catalyst is known to be poisoned under wet condition in long time use. The study is focused on the behavior of pre-oxidized Pd nanoparticle as the hard-used catalyst in high humidity environment by comparison of alumina and titanium oxide supports using in situ X-ray absorption spectroscopy technique. The reduction of surface oxide layer of Pd/TiO2 was promoted by water during hydrogen recombination, although the reduction reaction of Pd/Al2O3 was inhibited by water.

Funding source: Part of this work was supported by the Advanced Nuclear Hydrogen Safety Research Program funded by Agency for Natural Resources and Energy of Ministry of Economy, Trade and Industry. The present experiment was performed under the approval of Japan Synchrotron Radiation Research Institute (Proposal Nos. 2015B1443, 2018A1453, 2020A3609, 2021A3609, 2021B3609, 2022A3609, 2022B3609 and 2022B3630). The SPring-8 experiment was also supported by the Advanced Research Infrastructure for Materials and Nanotechnology in Japan (ARIM Japan) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan (Grant No. JPMXP1222AE0023) and the Shared-Use Program of JAEA Facilities (Proposal No. 2022B-E05). A part of this work was the results of the international joint project “Towards Safe Storage and Transportation of Cryogenic Hydrogen (STACY)” supported by Strategic International Collaborative Research Program of Japan Science and Technology Agency (JST SICORP), Grant No. JPMJSC21C3, Japan.
Related subjects: Safety
Countries: Japan
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2023-09-21
2024-12-14
/content/conference5881
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