Lee, Yeongdae Ahn, Jang Hyuk Park, Hee-Young Jung, Jeawoo Jeon, Yuju Lee, Dong-Gyu Kim, Min-Ho Lee, Eunryeol Kim, Chanseok Kwon, Youngkook Lee, Hyun-Wook Jang, Jong Hyun Lee, Jun Hee Song, Hyun-Kon 2024-01-19T15:34:38Z 2024-01-19T15:34:38Z 2021-09-02 2021-01 2211-2855 https://pubs.kist.re.kr/handle/201004/117618 It is demonstrated that the electroactivity of the oxygen reduction reaction (ORR) of Pt depends on the structure of a support. Highly conductive two-dimensional titanium carbide (Ti3C2) was selected as the support for Pt because of the expected strong metal-support interaction (SMSI) between Pt and Ti. To control the edge-to-basal ratio, the number of Ti3C2 layers was modulated by exfoliation. Pt nanoparticles (4 nm) were loaded on three different Ti3C2 supports including multi-, few-, and mono-layered Ti3C2 (22L-, 4L-, and 1L-Ti3C2, respectively). The edge-to-basal ratio of layered Ti3C2 increased as the number of layers increased. The edge-dominant support (22L-Ti3C2) donated more electrons to Pt than the basal-dominant supports (4L-Ti3C2 and 1L-Ti3C2). As a result, electron-rich Pt with less d-band vacancies (e.g., Pt/22L-Ti3C2) showed higher ORR activity. In addition, the electron transfer from the support to Pt inducing the strong interaction between Pt and Ti improved the durability of the ORR electroactivity of Pt. English ELSEVIER Support structure-catalyst electroactivity relation for oxygen reduction reaction on platinum supported by two-dimensional titanium carbide Article 10.1016/j.nanoen.2020.105363 1 NANO ENERGY, v.79 NANO ENERGY 79 scie scopus 000620324800005 2-s2.0-85091643607 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article SINGLE-CRYSTAL SURFACES SHAPE-CONTROLLED SYNTHESIS ELECTRONIC-PROPERTIES METAL ELECTROCATALYSTS NANOPARTICLES ACID OPTIMIZATION NANOCRYSTALS PERFORMANCE Structure-activity relation Metal-support interaction Oxygen reduction reaction Two-dimensional titanium carbide Electrocatalyst