催化作用
电催化剂
钯
乙醇
化学工程
化学
密度泛函理论
材料科学
组合化学
电化学
有机化学
物理化学
计算化学
电极
工程类
作者
Peng Wei,Jing Zhou,Ying‐Rui Lu,Ming Peng,Dingwang Yuan,Ting‐Shan Chan,Yongwen Tan
标识
DOI:10.1073/pnas.2222096120
摘要
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/Ti3C2Tx MXene (Pdene/Ti3C2Tx)-supported electrocatalyst is constructed via an in-situ growth approach for high-efficiency EOR. The resulting Pdene/Ti3C2Tx catalyst achieves an ultrahigh mass activity of 7.47 A mgPd-1 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/Ti3C2Tx catalyst is attributed to the unique and stable interfaces which reduce the reaction energy barrier of *CH3CO intermediate oxidation and facilitate oxidative removal of CO poisonous species by increasing the Pd-OH binding strength.
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