AI Article Synopsis
- The study explores how the structure and chemical makeup of metal-organic frameworks (MOFs) affect the properties and performance of metal oxide catalysts derived from them.
- Two different types of cobalt MOFs were synthesized to create ruthenium-doped cobalt oxides, with findings showing that oxalate-based MOFs produced better surface characteristics and catalytic performance compared to zeolitic imidazolate framework-67.
- The oxalate-derived catalyst (OX-CoO-Ru) demonstrated impressive catalytic activity for both hydrogen and oxygen evolution reactions, with high current densities and stability for overall water splitting applications.
Article Abstract
The influence of the preorganized structure and chemical composition of metal-organic frameworks (MOFs) on the morphology, surface properties, and catalytic activity of the MOFs-derived metal oxides is yet to be revealed. In this work, two types of Co-MOFs with different coordination configurations are synthesized for the preparation of the structure-engineered ruthenium (Ru)-doped cobalt oxides. The effect of the preorganized coordination structure of the MOFs on the morphology and surface properties is investigated. Interestingly, the oxalate-based MOFs derived Ru-doped cobalt oxide (OX-CoO-Ru) exhibits much better surface wettability and more oxygen vacancies than the zeolitic imidazolate framework-67 derived Ru-doped cobalt oxide. As expected, the OX-CoO-Ru owns excellent catalytic properties towards both hydrogen evolution reaction and oxygen evolution reaction with an overpotential of 49 and 286 mV, respectively at a current density of 100 mA cm in 1.0 M KOH. Importantly, the bifunctional OX-CoO-Ru catalyst offers an extremely high current density of 500 mA cm at a cell voltage of 1.71 V for overall water splitting and as well demonstrates robust working stability.
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| http://dx.doi.org/10.1016/j.jcis.2023.09.040 | DOI Listing |
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