Palladium metallene confined on MXene with increased hydroxyl binding strength for highly efficient ethanol electrooxidation.
Wei PengJing ZhouYing-Rui LuMing PengDingwang YuanTing-Shan ChanYongwen TanPublished in: Proceedings of the National Academy of Sciences of the United States of America (2023)
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 3 C 2 T x MXene (Pdene/Ti 3 C 2 T x )-supported electrocatalyst is constructed via an in-situ growth approach for high-efficiency EOR. The resulting Pdene/Ti 3 C 2 T x catalyst achieves an ultrahigh mass activity of 7.47 A mg Pd -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/Ti 3 C 2 T x catalyst is attributed to the unique and stable interfaces which reduce the reaction energy barrier of *CH 3 CO intermediate oxidation and facilitate oxidative removal of CO poisonous species by increasing the Pd-OH binding strength.
Keyphrases
- highly efficient
- density functional theory
- high efficiency
- molecular dynamics
- room temperature
- reduced graphene oxide
- electron transfer
- induced apoptosis
- ionic liquid
- visible light
- metal organic framework
- genome wide
- wastewater treatment
- dna binding
- gene expression
- nitric oxide
- cell proliferation
- cell death
- molecular dynamics simulations