TY - JOUR
T1 - Ni@Ru and NiCo@Ru Core–Shell Hexagonal Nanosandwiches with a Compositionally Tunable Core and a Regioselectively Grown Shell
AU - Hwang, Hyeyoun
AU - Kwon, Taehyun
AU - Kim, Ho Young
AU - Park, Jongsik
AU - Oh, Aram
AU - Kim, Byeongyoon
AU - Baik, Hionsuck
AU - Joo, Sang Hoon
AU - Lee, Kwangyeol
N1 - Funding Information:
H.H., T.K., and H.Y.K. contributed equally to this work. This research was supported by the National Research Foundation (NRF) of Korea (NRF-2017R1A2B3005682), BioNano Health-Guard Research Center funded by the Ministry of Science and ICT (MSIT) of Korea as Global Frontier Project, Grant No. H-GUARD_2013M3A6B2078946, IBS-R023-D1, and the Korea University Future Research Grant. S.H.J. and H.Y.K. were supported by the NRF of Korea (NRF-2017R1A2B2008464). The authors also thank Korea Basic Science Institute (KBSI) for allowing the usage of their HRTEM instruments.
Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinhei/1.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/1/18
Y1 - 2018/1/18
N2 - The development of highly active electrocatalysts is crucial for the advancement of renewable energy conversion devices. The design of core–shell nanoparticle catalysts represents a promising approach to boost catalytic activity as well as save the use of expensive precious metals. Here, a simple, one-step synthetic route is reported to prepare hexagonal nanosandwich-shaped Ni@Ru core–shell nanoparticles (Ni@Ru HNS), in which Ru shell layers are overgrown in a regioselective manner on the top and bottom, and around the center section of a hexagonal Ni nanoplate core. Notably, the synthesis can be extended to NiCo@Ru core–shell nanoparticles with tunable core compositions (Ni3Cox@Ru HNS). Core–shell HNS structures show superior electrocatalytic activity for the oxygen evolution reaction (OER) to a commercial RuO2 black catalyst, with their OER activity being dependent on their core compositions. The observed trend in OER activity is correlated to the population of Ru oxide (Ru4+) species, which can be modulated by the core compositions.
AB - The development of highly active electrocatalysts is crucial for the advancement of renewable energy conversion devices. The design of core–shell nanoparticle catalysts represents a promising approach to boost catalytic activity as well as save the use of expensive precious metals. Here, a simple, one-step synthetic route is reported to prepare hexagonal nanosandwich-shaped Ni@Ru core–shell nanoparticles (Ni@Ru HNS), in which Ru shell layers are overgrown in a regioselective manner on the top and bottom, and around the center section of a hexagonal Ni nanoplate core. Notably, the synthesis can be extended to NiCo@Ru core–shell nanoparticles with tunable core compositions (Ni3Cox@Ru HNS). Core–shell HNS structures show superior electrocatalytic activity for the oxygen evolution reaction (OER) to a commercial RuO2 black catalyst, with their OER activity being dependent on their core compositions. The observed trend in OER activity is correlated to the population of Ru oxide (Ru4+) species, which can be modulated by the core compositions.
KW - anisotropic core–shell nanoparticles
KW - hetero-nanostructure interfaces
KW - lattice mismatch
KW - one-pot synthesis
KW - oxygen evolution reaction
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U2 - 10.1002/smll.201702353
DO - 10.1002/smll.201702353
M3 - Article
C2 - 29171686
AN - SCOPUS:85034988931
VL - 14
JO - Small
JF - Small
SN - 1613-6810
IS - 3
M1 - 1702353
ER -
