Kim, Mansu Kim, Seung-hoon Park, Jonghwan Lee, Seongsoo Jang, Injoon Kim, Sohui Lee, Chang Yeon Kwon, Oh Joong Ham, Hyung Chul Hupp, Joseph T. T. Jung, Namgee Yoo, Sung Jong Whang, Dongmok 2024-01-19T09:05:18Z 2024-01-19T09:05:18Z 2023-05-04 2023-07 1616-301X https://pubs.kist.re.kr/handle/201004/113563 Downsizing a catalyst nanoparticle (NP) to a single atom (SA) has proven to be highly effective in increasing catalytic activity and decreasing the amount of catalyst required for various electrochemical reactions. However, insufficient stability of the single-atom site catalysts (SACs) is still a significant challenge for their practical application. Here, SACs firmly bound to stable metal oxide NPs are proposed to dramatically increase the electrochemical activity and stability of SA-based catalysts for hydrogen evolution reaction (HER). Starting from a Ru-infiltrated, Zr-based metal-organic framework (MOF), the tetragonal zirconium oxide (ZrO2-x) NPs-embedded carbon matrix is fabricated as support through facile pyrolysis. Simultaneously, Ru SAs as active sites are well dispersed on the surface of ZrO2-x NPs due to the generation of oxygen vacancies in the tetragonal ZrO2-x. The Ru-ZrO2-x SAC exhibits a 4？5 times higher mass activity than commercial Pt and Ru catalysts and superior durability due to strong metal-support interaction (SMSI) between Ru atoms and ZrO2-x substrate. English John Wiley & Sons Ltd. Reconstructing Oxygen-Deficient Zirconia with Ruthenium Catalyst on Atomic-Scale Interfaces toward Hydrogen Production Article 10.1002/adfm.202300673 1 Advanced Functional Materials, v.33, no.28 Advanced Functional Materials 33 28 N scie scopus 000972700200001 2-s2.0-85152916895 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article X-RAY-ABSORPTION SINGLE DEGRADATION ADSORPTION STABILITY EVOLUTION WATER ACID oxygen-deficient zirconia reconstruction engineering Ru catalysts single-atom sites catalysts hydrogen evolution reaction metal-organic frameworks metal-support interactions