High-pressure synthesis of ε-FeOOH from β-FeOOH and its application to the water oxidation catalyst.

ABSTRACT: Research on materials under extreme conditions such as high pressures provides new insights into the evolution and dynamics of the earth and space sciences, but recently, this research has focused on applications as functional materials. In this contribution, we examined high-pressure/high-temperature phases of β-FeO_1-x (OH)_1+x Cl _x with x = 0.12 (β-FeOOH) and their catalytic activities of water oxidation, i.e., oxygen evolution reaction (OER). Under pressures above 6 GPa and temperatures of 100-700 °C, β-FeOOH transformed into ε-FeOOH, as in the case of α-FeOOH. However, the established pressure-temperature phase diagram of β-FeOOH differs from that of α-FeOOH, probably owing to its open framework structure and partial oc

SUBMITTER: Mukai K 

PROVIDER: S-EPMC9058670 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature