Rational Design of Improved Ru Containing Fe-Based Metal-Organic Framework (MOF) Photoanode for Artificial Photosynthesis.

Autor: Patel J; Department of Physics and Astronomy, Purdue University, West Lafayette, IN, 47907, USA., Bury G; Department of Physics and Astronomy, Purdue University, West Lafayette, IN, 47907, USA., Pushkar Y; Department of Physics and Astronomy, Purdue University, West Lafayette, IN, 47907, USA.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Sep; Vol. 20 (37), pp. e2310106. Date of Electronic Publication: 2024 May 15.
DOI: 10.1002/smll.202310106
Abstrakt: Metal-Organic Frameworks (MOFs) recently emerged as a new platform for the realization of integrated devices for artificial photosynthesis. However, there remain few demonstrations of rational tuning of such devices for improved performance. Here, a fast molecular water oxidation catalyst working via water nucleophilic attack is integrated into the MOF MIL-142, wherein Fe 3 O nodes absorb visible light, leading to charge separation. Materials are characterized by a range of structural and spectroscopic techniques. New, [Ru(tpy)(Qc)(H 2 O)] + (tpy = 2,2':6',2″-terpyridine and Qc = 8-quinolinecarboxylate)-doped Fe MIL-142 achieved a high photocurrent (1.6 × 10 -3 A·cm -2 ) in photo-electrocatalytic water splitting at pH = 1. Unassisted photocatalytic H 2 evolution is also reported with Pt as the co-catalyst (4.8 µmol g -1 min -1 ). The high activity of this new system enables hydrogen gas capture from an easy-to-manufacture, scaled-up prototype utilizing MOF deposited on FTO glass as a photoanode. These findings provide insights for the development of MOF-based light-driven water-splitting assemblies utilizing a minimal amount of precious metals and Fe-based photosensitizers.
(© 2024 The Authors. Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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