Palladium metallene confined on MXene with increased hydroxyl binding strength for highly efficient ethanol electrooxidation.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37252989.
- Also identified by DOI 10.1073/pnas.2222096120 and PMC identifier 10265983.
- Licence recorded as CC BY-NC-ND.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
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/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene (Pdene/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>)-supported electrocatalyst is constructed via an in-situ growth approach for high-efficiency EOR. The resulting Pdene/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> catalyst achieves an ultrahigh mass activity of 7.47 A mg<sub>Pd</sub><sup>-1</sup> 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/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> catalyst is attributed to the unique and stable interfaces which reduce the reaction energy barrier of *CH<sub>3</sub>CO intermediate oxidation and facilitate oxidative removal of CO poisonous species by increasing the Pd-OH binding strength.