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Understanding the oxidation chemistry of Ti_(3)C_(2)T_(x)(MXene)sheets and their catalytic performances

Journal of Energy Chemistry 2024年第1期88卷 437-445,I0010页

作者： Suvdanchimeg Sunderiya Selengesuren Suragtkhuu Solongo Purevdorj Tumentsereg Ochirkhuyag Munkhjargal Bat-Erdene Purevlkham Myagmarsereejid Ashley DSlattery Abdulaziz SRBati joseph gshapter Dorj Odkhuu Sarangerel Davaasambuu Munkhbayar Batmunkh Department of Chemistry Division of Natural SciencesSchool of Arts and SciencesNational University of MongoliaUlaanbaatar 14200Mongolia Queensland Micro-and Nanotechnology Centre School of Environment and ScienceGriffith UniversityNathan campusBrisbaneQueensland 4111Australia Department of Physics Incheon National UniversityIncheon 22012Republic of Korea Australian Institute for Bioengineering and Nanotechnology The University of QueenslandSt LuciaBrisbaneQueensland 4072Australia Adelaide Microscopy The University of AdelaideAdelaideSouth Australia 5005Australia Centre for Organic Photonics&Electronics School of Chemistry and Molecular BiosciencesThe University of QueenslandSt LuciaBrisbaneQueensland 4072Australia

Transition metal carbides and nitrides(MXenes)nanosheets are attractive two-dimensional(2D)materials,but they suffer from oxidation/degradation issues during storage and/or applications due to their sensitivity to water and *** the great research progress,the exact oxidation kinetics of Ti_(3)C_(2)T_(x)(MXene)and their final products after oxidation are not fully ***,we systematically tracked the oxidation process of few-layer Ti_(3)C_(2)T_(x) nanosheets in an aqueous solution at room temperature over several *** also studied the oxidation effects on the electrocatalytic properties of Ti_(3)C_(2)T_(x) for hydrogen evolution reaction and found that the overpotential to achieve a current density of 10 mA cm^(-2)increases from 0.435 to 0.877 V after three weeks of degradation,followed by improvement to stabilized values of around 0.40 V after eight *** results suggest that severely oxidized MXene could be a promising candidate for designing efficient *** to our detailed experimental characterization and theoretical calculations,unlike previous studies,black titanium oxide is formed as the final product in addition to white Ti(IV)oxide and disordered carbons after the complete oxidation of Ti_(3)C_(2)T_(x).This work presents significant advancements in better understanding of 2D Ti_(3)C_(2)T_(x)(MXene)oxidation and enhances the prospects of this material for various applications.

关键词： 2D materials MXene Chemical degradation Catalysis Hydrogen evolution reaction

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