研究目的
To engineer the structure of cobalt oxides through the PLFL process for electrochemical oxygen evolution reaction (OER), aiming to improve catalytic activity by nanostructuring and modifying the electronic state of Co3O4.
研究成果
The PLFL process effectively engineers cobalt oxide nanostructures, resulting in nanoparticles with high surface area and structural defects that exhibit superior OER catalytic activity. This method shows potential for the sustainable production of active metal oxide catalysts.
研究不足
The mechanism of size reduction during PLFL is still unclear, and the process requires optimization for practical large-scale application.
1：Experimental Design and Method Selection:
Pulsed laser fragmentation in liquid (PLFL) was conducted in a water flowing system to produce sub-5 nm cobalt oxide nanoparticles.
2：Sample Selection and Data Sources:
Cobalt oxides (CoO and Co3O4) were prepared and subjected to PLFL.
3：List of Experimental Equipment and Materials:
Picosecond-pulsed Nd: YAG laser systems (PX 400-3-GH and Atlantic), aqueous suspensions of cobalt oxide powders.
4：Experimental Procedures and Operational Workflow:
The cobalt oxides were irradiated in a flowing system, followed by drying and characterization.
5：Data Analysis Methods:
Structural characterization was performed using nitrogen physisorption, electron microscopy, synchrotron X-ray diffraction, and X-ray photoelectron spectroscopy. Electrochemical performance was evaluated through linear sweep voltammetry, Tafel plots, and electrochemical impedance spectroscopy.
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