DataVXACS Applied Energy MaterialsPaper
journal article·2024-02-26

Trapping of Intermediates of a Photocatalytic Oxygen Evolution Reaction in Overall Water Splitting

Fumiaki Amano, Satoshi Nakayama, Souta Suzuki, Akira Yamakata, Kosuke Beppu

ACS Applied Energy Materials· Volume 7· Issue 4
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Source abstract

Abstract

Intermediates in the overall water splitting on particulate photocatalysts were investigated by electron paramagnetic resonance (EPR) measurements using 5,5-dimethyl-1-pyrroline N -oxide (DMPO) as a spin trap. In situ EPR spectra under ultraviolet light showed the exclusive formation of a hydroxyl radical adduct ( • DMPO-OH) over Ga 2 O 3 and NaTaO 3:La without a Rh–Cr oxide cocatalyst. In contrast, the Rh–Cr oxide cocatalyst-loaded photocatalysts active for water splitting formed a 5,5-dimethyl-2-oxo-pyrroline-1-oxyl radical ( • DMPOX). • DMPOX is suggested as an indicator of the surface peroxyl radical intermediate (M-OO • ) in the oxygen evolution reaction pathway.
Source: openalex_inverted_index · Quality: baseline

Research context

Catalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Ga2O3 and related materials · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 minami-Osawa, Hachioji, Tokyo 192-0397, Japan

Department of Chemical and Environmental Engineering, Graduate School of Environmental Engineering, The University of Kitakyushu, 1-1 Hibikino, Wakamatsu-ku, Kitakyushu, Fukuoka 808-0135, Japan

Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushima-Naka, Okayama 700-8530, Japan

Funding

Japan Society for the Promotion of Science

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