121st General Meeting of the KCS

Type Poster Presentation
Area Inorganic Chemistry
Room No. Event Hall
Time 4월 19일 (목요일) 11:00~12:30
Code INOR.P-163
Subject Synthesis and Characterization of Pd@Pt and PdH@Pt Core-shell Octahedra and Their Application towards the Hydrogen Evolution Reaction
Authors Jeonghyeon Kim, Sang-Il Choi1,*
Kyungpook National University, Korea
1Department of Chemistry, Kyungpook National University, Korea
Abstract Rational design of highly efficient electrocatalysts for the hydrogen evolution reaction (HER) is of prime importance for establishing renewable and sustainable energy systems. Alkaline HER is particularly challenging as it involves a two-step reaction of water dissociation and hydrogen recombination, for which platinum-based binary catalysts have shown promising activity. Typical strategies, including optimization of shape or facet, formation of alloys with other metals, and incorporation of a different metal into the core, have been investigated to enhance the activity of a Pt-based catalyst and thus reduce the loading of Pt. This presentation reports the synthesis and characterization of Pd@Pt and PdH0.40@Pt core-shell octahedra as the activity electrocatalysts towards the HER. Two different core-shell octahedra were obtained by direct deposition of conformal Pt shells on Pd and PdH0.40 octahedra, respectively. The core-shell structure was confirmed by a number of techniques, including scanning transmission electron microscopy, energy-dispersive X-ray spectroscopy mapping, X-ray diffraction, X-ray absorption spectroscopy and electrochemical measurements. HER activities of Pd@Pt and PdH0.40@Pt core-shell octahedra are also presented
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