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Palladium metallene confined on MXene with increased hydroxyl binding strength for highly efficient ethanol electrooxidation. | LitMetric
Rational design and synthesis of high-performance electrocatalysts for ethanol oxidation reaction (EOR) is crucial to large-scale commercialization of direct ethanol fuel cells, but it is still an incredible challenge. Herein, a unique Pd metallene/TiCT MXene (Pdene/TiCT)-supported electrocatalyst is constructed via an in-situ growth approach for high-efficiency EOR. The resulting Pdene/TiCT catalyst achieves an ultrahigh mass activity of 7.47 A mg under alkaline condition, as well as high tolerance to CO poisoning. In situ attenuated total reflection-infrared spectroscopy studies combined with density functional theory calculations reveal that the excellent EOR activity of Pdene/TiCT catalyst is attributed to the unique and stable interfaces which reduce the reaction energy barrier of *CHCO intermediate oxidation and facilitate oxidative removal of CO poisonous species by increasing the Pd-OH binding strength.
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