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Photoelectrochemical Water Oxidation by Cobalt Cytochrome C Integrated-ATO Photoanode
- Source :
- Catalysts, Vol 11, Iss 5, p 626 (2021)
- Publication Year :
- 2021
- Publisher :
- MDPI AG, 2021.
-
Abstract
- Here, we report the immobilization of Co-protoporphyrin IX (Co-PPIX) substituted cytochrome c (Co-cyt c) on Antimony-doped Tin Oxide (ATO) as a catalyst for photoelectrochemical oxidation of water. Under visible light irradiation (λ > 450 nm), the ATO-Co-cyt c photoanode displays ~6-fold enhancement in photocurrent density relative to ATO-Co-PPIX at 0.25 V vs. RHE at pH 5.0. The light-induced water oxidation activity of the system was demonstrated by detecting evolved stoichiometric oxygen by gas chromatography, and incident photon to current efficiency was measured as 4.1% at 450 nm. The faradaic efficiency for the generated oxygen was 97%, with a 671 turnover number (TON) for oxygen. The current density had a slow decay over the course of 6 h of constant irradiation and applied potential, which exhibits the robustness of catalyst-ATO interaction.
Details
- Language :
- English
- ISSN :
- 20734344
- Volume :
- 11
- Issue :
- 5
- Database :
- Directory of Open Access Journals
- Journal :
- Catalysts
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.6b81c2ca57f4653ae1415f5ef557f0a
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/catal11050626