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CeO2 nanomaterials are widely used as excellent catalysts for CO oxidation, tail gas purification and gas reforming, but they are rarely used in the oxygen reduction reaction (ORR). Here, a hybrid of few-layer carbon encapsulated defect-rich CeO2−x (CeO2−x@C), which was prepared by an direct-current arc-discharge process, is presented as a new efficient ORR catalyst. The defective structure of CeO...
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