TY  - JOUR
AU  - Göhl, Daniel
AU  - Paciok, Paul
AU  - Wang, Zhenshu
AU  - Kang, Jin Soo
AU  - Heggen, Marc
AU  - Mayrhofer, Karl
AU  - Román-Leshkov, Yuriy
AU  - Ledendecker, Marc
TI  - Core‐passivation: A concept for stable core‐shell nanoparticles in aqueous electrocatalysis
JO  - Nano select
VL  - 4
IS  - 4
SN  - 2688-4011
CY  - Weinheim, Germany
PB  - Wiley-VCH
M1  - FZJ-2023-01720
SP  -  271-277
PY  - 2023
AB  - The stability of nanoparticles is a major challenge in thermal and electrocatalysis. This is especially true for core-shell nanoparticles where only a few monolayers of noble metal protect the usually non-noble core material. In this work, we utilize the practical nobility concept to engineer stable core-shell nanoparticles with a self-passivating core material. Specifically, tantalum carbide as core material in combination with a 1–3 monolayer thick platinum shell exhibits exceptional stability in aqueous media. The core-shell catalyst shows no sign of structural changes after 10,000 degradation cycles up to 1.0 VRHE. Due to the efficient passivation of tantalum carbide at the solid/liquid interface, the dissolution reduces by a factor of eight compared to bare Pt. Our findings confirm that passivating core materials are highly beneficial for the stabilization of core-shell nanomaterials in aqueous media. They open up new ways for the rational design of cost-efficient but stable non-noble core – platinum shell nanoparticles where harsh, oxidizing conditions are employed
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001176583100006
DO  - DOI:10.1002/nano.202200240
UR  - https://juser.fz-juelich.de/record/1006572
ER  -