Unravelling inherent electrocatalysis of mixed-conducting oxide activated by metal nanoparticle for fuel cell electrodes

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Title
Unravelling inherent electrocatalysis of mixed-conducting oxide activated by metal nanoparticle for fuel cell electrodes
Author(s)
Yoonseok Choi; Seung Keun Cha; Hyunwoo Ha; Siwon Lee; Hyeon Kook Seo; Jeong Yong Lee; Hyun You Kim; Sang Ouk Kim; WooChul Jung
Publication Date
2019-03
Journal
Nature Nanotechnology, v.14, no.3, pp.245 - 251
Publisher
NATURE PUBLISHING GROUP
Abstract
Highly active metal nanoparticles are desired to serve in high-temperature electrocatalysis, for example, in solid oxide electrochemical cells. Unfortunately, the low thermal stability of nanosized particles and the sophisticated interface requirement for electrode structures to support concurrent ionic and electronic transport make it hard to identify the exact catalytic role of nanoparticles embedded within complex electrode architectures. Here we present an accurate analysis of the reactivity of oxide electrodes boosted by metal nanoparticles, where all particles participate in the reaction. Monodisperse particles (Pt, Pd, Au and Co), 10 nm in size and stable at high temperature (more than 600 °C), are uniformly distributed onto mixed-conducting oxide electrodes as a model electrochemical cell via self-assembled nanopatterning. We identify how the metal catalysts activate hydrogen electrooxidation on the ceria-based electrode surface and quantify how rapidly the reaction rate increases with proper choice of metal. These results suggest an ideal electrode design for high-temperature electrochemical applications. © 2019, The Author(s), under exclusive licence to Springer Nature Limited
URI
https://pr.ibs.re.kr/handle/8788114/5662
ISSN
1748-3387
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > Journal Papers (저널논문)
Files in This Item:
Nature Nanotechnology VOL 14 246, MARCH 2019, 245–251.pdfDownload

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