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Design of a Metal/Oxide/Carbon Interface for Highly Active and Selective Electrocatalysis

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Title
Design of a Metal/Oxide/Carbon Interface for Highly Active and Selective Electrocatalysis
Author(s)
Hyunjoong Kim; Ji Mun Yoo; Chung, Dong Young; Kim, Yongseon; Jung, Moonjung; Megalamane S. Bootharaju; Jiheon Kim; Sagang Koo; Heejong Shin; Geumbi Na; Mun, Bongjin Simon; Kwak, Ja Hun; Yung-Eun Sung; Taeghwan Hyeon
Publication Date
2022-10
Journal
ACS NANO, v.16, no.10, pp.16529 - 16538
Publisher
AMER CHEMICAL SOC
Abstract
Sustainable energy-conversion and chemical-production require catalysts with high activity, durability, and product-selectivity. Metal/oxide hybrid structure has been intensively investigated to achieve promising catalytic performance, especially in neutral or alkaline electrocatalysis where water dissociation is promoted near the oxide surface for (de)protonation of intermediates. Although catalytic promise of the hybrid structure is demonstrated, it is still challenging to precisely modulate metal/oxide interfacial interactions on the nanoscale. Herein, we report an effective strategy to construct rich metal/oxide nano-interfaces on conductive carbon supports in a surfactant-free and self-terminated way. When compared to the physically mixed Pd/CeO2 system, a much higher degree of interface formation was identified with largely improved hydrogen oxidation reaction (HOR) kinetics. The benefits of the rich metal-CeO2 interface were further generalized to Pd alloys for optimized adsorption energy, where the Pd3Ni/CeO2/C catalyst shows superior performance with HOR selectivity against CO poisoning and shows long-term stability. We believe this work highlights the importance of controlling the interfacial junctions of the electrocatalyst in simultaneously achieving enhanced activity, selectivity, and stability.
URI
https://pr.ibs.re.kr/handle/8788114/12667
DOI
10.1021/acsnano.2c05856
ISSN
1936-0851
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > 1. Journal Papers (저널논문)
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