Surface-functionalized three-dimensional MXene supports to boost the hydrogen evolution activity of Pt catalysts in alkaline media
- 주제(기타) Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary
- 설명문(일반) [Hong, Haeji] Ewha Womans Univ, Coll Engn, Dept Chem Engn & Mat Sci, 52 Ewhayeodae Gil, Seoul 03760, South Korea; [Hong, Haeji] Ewha Womans Univ, Grad Program Syst Hlth Sci & Engn, 52 Ewhayeodae Gil, Seoul 03760, South Korea; [Kim, Ho Young; Kim, Jin Young] Korea Inst Sci & Technol KIST, Hydrogen Fuel Cell Res Ctr, Seoul 02792, South Korea; [Cho, Won Il] Korea Inst Sci & Technol KIST, Ctr Energy Storage Res, Seoul 02792, South Korea; [Song, Ho Chang; Ham, Hyung Chul] Inha Univ, Dept Chem Engn, Inha Ro 100, Incheon 22212, South Korea; [Chae, Kyunghee; Marques Mota, Filipe; Kim, Dong Ha] Ewha Womans Univ, Coll Nat Sci, Dept Chem & Nano Sci, Div Mol & Life Sci, 52 Ewhayeodae Gil, Seoul 03760, South Korea; [Marques Mota, Filipe] Univ Lincoln, Sch Chem, Lincoln LN6 7TS, Lincolnshire, England; [Kim, Dong Ha] Ewha Womans Univ, Basic Sci Res Inst, Prior Res Inst, 52 Ewhayeodae Gil, Seoul 03760, South Korea; [Kim, Dong Ha] Ewha Womans Univ, Nanobio Energy Mat Ctr, Natl Res Facil & Equipment Ctr, 52 Ewhayeodae Gil, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 ROYAL SOC CHEMISTRY
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000205911
- 본문언어 영어
- Published As https://doi.org/10.1039/d2ta08852e
초록/요약
Alkaline water electrolysis is the most promising technology for green-hydrogen production, which is considered a cornerstone of carbon-neutral energy society. In the development of functional catalysts able to overcome the sluggish kinetics of the alkaline hydrogen evolution reaction (HER), MXenes emerge as attractive support candidates with distinctive hydrophilicity, high conductivity, and high (electro)chemical stability. Herein, we assess the promise of three-dimensionally interconnected Ti3C2Tx MXenes with distinct surface terminations (-O, -OH, and -F) as efficient support materials for Pt-loaded alkaline HER catalysts. In particular, our OH-functionalized Pt/Ti3C2(OH)(x) shows the highest HER activity (30 mV dec(-1)), unlocking a competitive performance against the Pt/C reference (61 mV dec(-1)) and benchmark literature reports. The outstanding performance is ascribed to the cooperative effects of the extended MXene surface area and established interactions between Pt and Ti(OH)(x) surface centers. In parallel, the oxophilic nature of Ti3C2(OH)(x) facilitates Pt dispersion, presumably playing a key role in the extended catalytic stability here reported. The superior activity is further substantiated by density functional theory calculations, with the modeled Pt/Ti3C2(OH)(2) unveiling a significantly higher onset potential and the weakest hydrogen binding energy over supported Pt nanoparticles (-2.51 eV) against both -O (-2.72 eV) and -F (-3.15 eV) functionalized counterparts.
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