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Catalytic effect of plasma in lowering the reduction temperature of Fe₂O₃

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arxiv 2102.13369 v1 pith:KDSGOVOY submitted 2021-02-26 physics.plasm-ph

Catalytic effect of plasma in lowering the reduction temperature of $Fe_{2}O_{3}$

classification physics.plasm-ph
keywords plasmasurfacetemperaturecatalyticeffecthematitereductiontreatment
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Atmospheric pressure plasma (APP) generates highly reactive species that are useful for surface activations. We demonstrate a fast regeneration of iron oxides, that are popular catalysts in various industrial processes, using microwave-driven argon APP under ambient condition. The surface treatment of hematite powder by the APP with a small portion of hydrogen (0.5%) lowers the oxide's reduction temperature. A near-infrared laser is used for localized heating to control the surface temperature. Controlled experiments without plasma confirm the catalytic effect of the plasma. Raman, XRD, SEM, and XPS analyses show that the plasma treatment changed the chemical state of the hematite to that of magnetite without sintering.

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