Optimization of the CeO2/CeCl3 cycle by cerium IV oxide reductive dissolution catalysis

摘要

While thermochemical cycles can be a way to produce hydrogen, physiochemical studies show that implementing them is often difficult for reactivity reasons. Most of the cycles actually involve solid gas type systems with limited reactivity due to interface passivation processes. To overcome this difficulty, studies have shown that using the CeO2/CeCl3 pair, in which the cerium undergoes a reversible oxidation reduction cycle, has enormous potential since it may partially be carried out in aqueous phase by reductive dissolution from cerium oxides (IV) to cerium chloride (III).