TEMPO‐Oxidized Cellulose Nanofibers as Pseudocatalysts for in Situ and on‐Demand Hydrogen Generation via Aluminum Powder/Pure Water Reactions at a Temperature below 50 °C

Autor:	Bunshi Fugetsu, Shuri Yoshinaga, Ayumi Kimura, Takeo Hoshino, Ichiro Sakata, Akira Isogai
Jazyk:	angličtina
Rok vydání:	2023
Předmět:	aluminum powder/pure water reactions low reaction temperatures on-demand and in situ hydrogen generation pseudocatalysts TEMPO-oxidized cellulose nanofibers (TEMPO-CNFs) Environmental technology. Sanitary engineering TD1-1066 Renewable energy sources TJ807-830
Zdroj:	Advanced Energy & Sustainability Research, Vol 4, Iss 8, Pp n/a-n/a (2023)
Druh dokumentu:	article
ISSN:	2699-9412 45801657
DOI:	10.1002/aesr.202300070
Popis:	Cellulose nanofibers (CNFs) prepared via 2,2,6,6‐tetramethylpiperidine‐1‐oxyl (TEMPO)‐mediated oxidation of the C6 primary hydroxyls of native cellulose to carboxylates are used as pseudocatalysts for enhancing the aluminum powder/pure water reactions. The Al powder/pure water reaction is a stepwise reaction. It starts from hydration of the outmost native Al2O3 thin layer and then the reaction of the inner metallic Al with water. At lower temperatures ( 11) is dynamically generated, and as a result, the native Al2O3 thin layer dissolves rapidly via the reaction with OH− ions. The OH− ions function also as catalysts, accelerating the reaction of metallic Al with water. Al powders (2–200 μm) react promptly and a nearly 100% Al/H2 conversion is obtained at the reaction temperature below 50 °C.
Databáze:	Directory of Open Access Journals
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