Correlating 3D Surface Atomic Structure and Catalytic Activities of Pt Nanocrystals
- 주제(키워드) Surface atomic structure , 3D coordination map , 3D atomic structure , Surface coordination number , Structure-catalytic activity relationship , Nanocrystal imaging
- 주제(기타) Chemistry, Multidisciplinary
- 주제(기타) Chemistry, Physical
- 주제(기타) Nanoscience & Nanotechnology
- 주제(기타) Materials Science, Multidisciplinary
- 주제(기타) Physics, Applied
- 주제(기타) Physics, Condensed Matter
- 설명문(일반) [Kim, Sungin; Kang, Sungsu; Heo, Junyoung; Kim, Byung Hyo; Hyeon, Taeghwan; Park, Jungwon] Ctr Nanoparticle Res, Inst Basic Sci IBS, Seoul 08826, South Korea; [Kim, Sungin; Kwag, Jimin; Kang, Sungsu; Heo, Junyoung; Kang, Dohun; Kim, Byung Hyo; Hyeon, Taeghwan; Park, Jungwon] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 08826, South Korea; [Kim, Sungin; Kwag, Jimin; Kang, Sungsu; Heo, Junyoung; Kang, Dohun; Kim, Byung Hyo; Hyeon, Taeghwan; Park, Jungwon] Seoul Natl Univ, Inst Chem Proc, Seoul 08826, South Korea; [Machello, Chiara; Reboul, Cyril F.; Elmlund, Hans] Monash Univ, Biomed Discovery Inst, Dept Biochem & Mol Biol, Clayton, Vic 3800, Australia; [Machello, Chiara; Reboul, Cyril F.; Elmlund, Hans] ARC Ctr Excellence Adv Mol Imaging, Clayton, Vic 3800, Australia; [Kang, Seulki; Park, So-Jung] Ewha Womans Univ, Dept Chem & Nanosci, Seoul 03760, South Korea; [Shim, Sangdeok] Sunchon Natl Univ, Dept Chem, Sunchon 57922, South Korea; [Kim, Byung Hyo] Soongsil Univ, Dept Organ Mat & Fiber Engn, Seoul 06978, South Korea; [Ercius, Peter] Natl Ctr Electron Microscopy, Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2021
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000181382
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acs.nanolett.0c04873
초록/요약
Active sites and catalytic activity of heterogeneous catalysts is determined by their surface atomic structures. However, probing the surface structure at an atomic resolution is difficult, especially for solution ensembles of catalytic nanocrystals, which consist of heterogeneous particles with irregular shapes and surfaces. Here, we constructed 3D maps of the coordination number (CN) and generalized CN ((CN) over bar) for individual surface atoms of sub-3 nm Pt nanocrystals. Our results reveal that the synthesized Pt nanocrystals are enclosed by islands of atoms with nonuniform shapes that lead to complex surface structures, including a high ratio of low-coordination surface atoms, reduced domain size of low-index facets, and various types of exposed high-index facets. 3D maps of (CN) over bar are directly correlated to catalytic activities assigned to individual surface atoms with distinct local coordination structures, which explains the origin of high catalytic performance of small Pt nanocrystals in important reactions such as oxygen reduction reactions and CO electro-oxidation.
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