| Autor: |
Beglau, Thi Hai Yen, Fetzer, Marcus N. A., Boldog, Istvan, Heinen, Tobias, Suta, Markus, Janiak, Christoph, Yücesan, Gündoğ |
| Předmět: |
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| Zdroj: |
Chemistry - A European Journal; 1/2/2024, Vol. 30 Issue 1, p1-8, 8p |
| Abstrakt: |
Two new isostructural semiconducting metal‐phosphonate frameworks are reported. Co2[1,4‐NDPA] and Zn2[1,4‐NDPA] (1,4‐NDPA4− is 1,4‐naphthalenediphosphonate) have optical bandgaps of 1.7 eV and 2.5 eV, respectively. The electrocatalyst derived from Co2[1,4‐NPDA] as a precatalyst generated a low overpotential of 374 mV in the oxygen evolution reaction (OER) with a Tafel slope of 43 mV dec−1 at a current density of 10 mA cm−2 in alkaline electrolyte (1 mol L−1 KOH), which is indicative of remarkably superior reaction kinetics. Benchmarking of the OER of Co2[1,4‐NPDA] material as a precatalyst coupled with nickel foam (NF) showed exceptional long‐term stability at a current density of 50 mA cm−2 for water splitting compared to the state‐of‐the‐art Pt/C/RuO2@NF after 30 h in 1 mol L−1 KOH. In order to further understand the OER mechanism, the transformation of Co2[1,4‐NPDA] into its electrocatalytically active species was investigated. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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