AI Article Synopsis
- Researchers emphasize the need for efficient, cost-effective electrocatalysts for water splitting, focusing on transition metals.
- Am-Mo-NiS Se, a new catalyst made from amorphous and crystalline materials, shows impressive results in hydrogen and oxygen production in phosphate buffer saline solution.
- Theoretical insights suggest that the catalyst’s unique structure enhances its performance by optimizing key energy barriers for reactions.
Article Abstract
It is vitally important to develop highly active, robust and low-cost transition metal-based electrocatalysts for overall water splitting in neutral solution especially at large current density. In this work, amorphous Mo-doped NiS Se nanosheets@crystalline NiS Se nanorods (Am-Mo-NiS Se ) was synthesized using a facil one-step strategy. In phosphate buffer saline solution, the Am-Mo-NiS Se shows tiny overpotentials of 48 and 209 mV for hydrogen evolution reaction (HER), 238 and 514 mV for oxygen evolution reaction (OER) at 10 and 1000 mA cm , respectively. Moreover, Am-Mo-NiS Se delivers excellent stability for at least 300 h without obvious degradation. Theoretical calculations revealed that the Ni sites in the defect-rich amorphous structure of Am-Mo-NiS Se owns higher electron state density and strengthened the binding energy of H O, which will optimize H adsorption/desorption energy barriers and reduce the adsorption energy of OER determining step.
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| http://dx.doi.org/10.1002/anie.202215256 | DOI Listing |
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