Ni at Ru and NiCo at Ru Core-Shell Hexagonal Nanosandwiches with a Compositionally Tunable Core and a Regioselectively Grown Shell

Hyeyoun Hwang, Taehyun Kwon, Ho Young Kim, Jongsik Park, Aram Oh, Byeongyoon Kim, Hionsuck Baik, Sang Hoon Joo, Kwangyeol Lee

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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 at Ru core-shell nanoparticles (Ni at 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 at Ru core-shell nanoparticles with tunable core compositions (Ni3Cox at 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.

Original languageEnglish
JournalSmall
DOIs
Publication statusAccepted/In press - 2017 Jan 1

Fingerprint

Nanoparticles
Oxygen
Chemical analysis
Renewable Energy
Catalysts
Electrocatalysts
Precious metals
Energy conversion
Oxides
Catalyst activity
Metals
Equipment and Supplies
Population

Keywords

  • Anisotropic core-shell nanoparticles
  • Hetero-nanostructure interfaces
  • Lattice mismatch
  • One-pot synthesis
  • Oxygen evolution reaction

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Engineering (miscellaneous)

Cite this

Ni at Ru and NiCo at Ru Core-Shell Hexagonal Nanosandwiches with a Compositionally Tunable Core and a Regioselectively Grown Shell. / Hwang, Hyeyoun; Kwon, Taehyun; Kim, Ho Young; Park, Jongsik; Oh, Aram; Kim, Byeongyoon; Baik, Hionsuck; Joo, Sang Hoon; Lee, Kwangyeol.

In: Small, 01.01.2017.

Research output: Contribution to journalArticle

Hwang, Hyeyoun ; Kwon, Taehyun ; Kim, Ho Young ; Park, Jongsik ; Oh, Aram ; Kim, Byeongyoon ; Baik, Hionsuck ; Joo, Sang Hoon ; Lee, Kwangyeol. / Ni at Ru and NiCo at Ru Core-Shell Hexagonal Nanosandwiches with a Compositionally Tunable Core and a Regioselectively Grown Shell. In: Small. 2017.
@article{6a5af5d19e7b43ba8d4f7e392e382ba4,
title = "Ni at Ru and NiCo at Ru Core-Shell Hexagonal Nanosandwiches with a Compositionally Tunable Core and a Regioselectively Grown Shell",
abstract = "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 at Ru core-shell nanoparticles (Ni at 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 at Ru core-shell nanoparticles with tunable core compositions (Ni3Cox at 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.",
keywords = "Anisotropic core-shell nanoparticles, Hetero-nanostructure interfaces, Lattice mismatch, One-pot synthesis, Oxygen evolution reaction",
author = "Hyeyoun Hwang and Taehyun Kwon and Kim, {Ho Young} and Jongsik Park and Aram Oh and Byeongyoon Kim and Hionsuck Baik and Joo, {Sang Hoon} and Kwangyeol Lee",
year = "2017",
month = "1",
day = "1",
doi = "10.1002/smll.201702353",
language = "English",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",

}

TY - JOUR

T1 - Ni at Ru and NiCo at 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

PY - 2017/1/1

Y1 - 2017/1/1

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 at Ru core-shell nanoparticles (Ni at 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 at Ru core-shell nanoparticles with tunable core compositions (Ni3Cox at 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 at Ru core-shell nanoparticles (Ni at 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 at Ru core-shell nanoparticles with tunable core compositions (Ni3Cox at 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

UR - http://www.scopus.com/inward/record.url?scp=85034988931&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85034988931&partnerID=8YFLogxK

U2 - 10.1002/smll.201702353

DO - 10.1002/smll.201702353

M3 - Article

C2 - 29171686

AN - SCOPUS:85034988931

JO - Small

JF - Small

SN - 1613-6810

ER -