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Entropy-directed metal–organic frameworks drive solar-electrolytic water splitting.
- Source :
-
Chemical Engineering Journal . Jan2024, Vol. 480, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- [Display omitted] • High- and low-entropy metal–organic frameworks (MOF) have been demonstrated for hydrogen and oxygen evolution reaction. • These entropy-directed catalysts demonstrates excellent performances for overall water splitting. • A photovoltaic-tandem water splitting system has been assembled with high solar-to-hydrogen energy efficiency. We report a water splitting system based on flow-type electrolytic cells, which are catalyzed by the catalysts composed of anodic high-entropy metal–organic framework (MOF) and cathodic low-entropy nickel, iron-MOF. These MOF catalysts have shown excellent activities for overall water splitting characteristic of small applied voltage (1.64 V at 10 mA cm−2) and strong durability for 100 hrs. Based on these catalysts, a tandem system has been assembled by connecting several flow-type water-splitting cells in series, which require 3.3 V for two cells and 5.32 V for three cells to reach 10 mA cm−2. Further, a solar-to-hydrogen production system has been demonstrated by coupling the tandem water splitting cells with photovoltaic panels, which show high Faradaic efficiencies (98.93 %, 98.95 %, and 98.40 %) and energy efficiencies (18.80 %, 18.80 % and 18.70 %) for single-, two-, and three-cells, respectively. The present work would provide new insights into the design of efficient energy-conversion systems for many applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 480
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 174874345
- Full Text :
- https://doi.org/10.1016/j.cej.2023.148017