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Two‐dimensional materials have gained significant attention across the materials community due to their remarkable physical, chemical, electronic, and optical properties. With many two‐dimensional materials discovered each year, investigations into their processing, scalability, and resulting properties are important to fully realize their potential in next‐generation technologies. While numerous exfoliation techniques are available for a variety of two‐dimensional materials, liquid‐phase exfoliation techniques offer many advantages, particularly high throughput and scalability. Herein, we report a liquid‐phase exfoliation method to access multilayer cobalt oxide nanosheets in pH‐neutral aqueous solutions varying in size, concentration, and application. The size, thickness, and morphology of the multilayer nanosheets were confirmed using atomic force microscopy and transmission electron microscopy. Finally, selected cobalt oxide nanosheets underwent additional analysis of the crystallinity, structure, and cobalt valance. [ABSTRACT FROM AUTHOR]

LiCoO2 (LCO) powders were protonated and their catalytic activity on the thermal decomposition of ammonium perchlorate (AP) was tested using differential scanning calorimetry and thermogravimetric analysis. Powders were characterized using SEM, XRD, and BET surface area analysis to quantify the morphology and structure. The thermal analysis showed that protonated powders enhanced the catalytic activity in AP decomposition over commercial and unmodified LiCoO2, Fe2O3 and Co3O4 catalyst powders. The activation energies were investigated using the model-free Kissinger method, and the possible mechanisms governing the catalytic activity are discussed. The activation energies of AP thermal decomposition were decreased significantly by the use of these protonated catalysts. For neat AP, commercial LCO, and protonated LCO the activation energy for LTD and HTD were: 104 ± 5 kJ/mol and 143 ± 4 kJ/mol, 89 ± 4 kJ/mol and 92 ± 14 kJ/mol, and 76 ± 6 kJ/mol and 98 ± 7 kJ/mol respectively. We believe the hydrogen and vacancies in the protonated lattice act as reaction sites for the decomposition of AP. [ABSTRACT FROM AUTHOR]