Jeffery, A. Anto Lee, Sang-Young Min, Jiho Kim, Youngjin Lee, Seunghyun Lee, Jin Hee Jung, Namgee Yoo, Sung Jong 2024-01-19T17:02:02Z 2024-01-19T17:02:02Z 2021-09-02 2020-08 0256-1115 https://pubs.kist.re.kr/handle/201004/118314 In many catalyst systems, including fuel cell applications, control of the catalyst surface composition is important for improving activity since catalytic reactions occur only at the surface. However, it is very difficult to modify the surface composition without changing the morphology of metal nanoparticles. Herein, carbon-supported Pd(3)Au(1)nanoparticles with uniform size and distribution are fabricated by tert-butylamine reduction method. Pd or Au surface segregation is induced by simply heating as-prepared Pd(3)Au(1)nanoparticles under CO or Ar atmosphere, respectively. Especially, CO-induced Pd surface segregation allows the alloy nanoparticles to have a Pd-rich surface, which is attributed to the strong CO binding energy of Pd. To demonstrate the change in surface composition of Pd(3)Au(1)alloy catalyst with the annealing gas species, the oxygen reduction reaction performance is investigated and consequently, Pd(3)Au(1)catalyst with the highest number of surface Pd atoms indicates excellent catalytic activity. Therefore, the present work provides insights into the development of metal-based alloys with optimum structures and surface compositions for various catalytic systems. English KOREAN INSTITUTE CHEMICAL ENGINEERS BIMETALLIC CATALYSTS ENHANCED ACTIVITY FORMIC-ACID ALLOY ELECTROCATALYSTS OXIDATION NANOCATALYSTS GRAPHENE ETHANOL ENERGY Surface engineering of Pd-based nanoparticles by gas treatment for oxygen reduction reaction Article 10.1007/s11814-020-0586-2 1 KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.37, no.8, pp.1360 - 1364 KOREAN JOURNAL OF CHEMICAL ENGINEERING 37 8 1360 1364 scie scopus kci ART002610727 000557498200009 2-s2.0-85089079496 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article BIMETALLIC CATALYSTS ENHANCED ACTIVITY FORMIC-ACID ALLOY ELECTROCATALYSTS OXIDATION NANOCATALYSTS GRAPHENE ETHANOL ENERGY CO-induced Surface Segregation Surface Composition Metal Alloy Catalyst Oxygen Reduction Reaction