Abstract
Nanoframe electrocatalysts have attracted great interest due to their inherently high active surface area per a given mass. Although recent progress has enabled the preparation of single nanoframe structures with a variety of morphologies, more complex nanoframe structures such as a double-layered nanoframe have not yet been realized. Herein, we report a rational synthetic strategy for a structurally robust Ir-based multimetallic double-layered nanoframe (DNF) structure, nanoframe@nanoframe. By leveraging the differing kinetics of dual Ir precursors and dual transition metal (Ni and Cu) precursors, a core-shell-type alloy@alloy structure could be generated in a simple one-step synthesis, which was subsequently transformed into a multimetallic IrNiCu DNF with a rhombic dodecahedral morphology via selective etching. The use of single Ir precursor yielded single nanoframe structures, highlighting the importance of employing dual Ir precursors. In addition, the structure of Ir-based nanocrystals could be further controlled to DNF with octahedral morphology and CuNi@Ir core-shell structures via a simple tuning of experimental factors. The IrNiCu DNF exhibited high electrocatalytic activity for oxygen evolution reaction (OER) in acidic media, which is better than Ir/C catalyst. Furthermore, IrNiCu DNF demonstrated excellent durability for OER, which could be attributed to the frame structure that prevents the growth and agglomeration of particles as well as in situ formation of robust rutile IrO2 phase during prolonged operation.
| Original language | English |
|---|---|
| Pages (from-to) | 5500-5509 |
| Number of pages | 10 |
| Journal | ACS Nano |
| Volume | 11 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2017 Jun 27 |
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Keywords
- electrocatalysis
- iridium-based nanocrystal
- kinetic control
- nanoframe
- oxygen evolution reaction
- ternary alloy
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)
Cite this
Iridium-Based Multimetallic Nanoframe@Nanoframe Structure : An Efficient and Robust Electrocatalyst toward Oxygen Evolution Reaction. / Park, Jongsik; Sa, Young Jin; Baik, Hionsuck; Kwon, Taehyun; Joo, Sang Hoon; Lee, Kwangyeol.
In: ACS Nano, Vol. 11, No. 6, 27.06.2017, p. 5500-5509.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Iridium-Based Multimetallic Nanoframe@Nanoframe Structure
T2 - An Efficient and Robust Electrocatalyst toward Oxygen Evolution Reaction
AU - Park, Jongsik
AU - Sa, Young Jin
AU - Baik, Hionsuck
AU - Kwon, Taehyun
AU - Joo, Sang Hoon
AU - Lee, Kwangyeol
PY - 2017/6/27
Y1 - 2017/6/27
N2 - Nanoframe electrocatalysts have attracted great interest due to their inherently high active surface area per a given mass. Although recent progress has enabled the preparation of single nanoframe structures with a variety of morphologies, more complex nanoframe structures such as a double-layered nanoframe have not yet been realized. Herein, we report a rational synthetic strategy for a structurally robust Ir-based multimetallic double-layered nanoframe (DNF) structure, nanoframe@nanoframe. By leveraging the differing kinetics of dual Ir precursors and dual transition metal (Ni and Cu) precursors, a core-shell-type alloy@alloy structure could be generated in a simple one-step synthesis, which was subsequently transformed into a multimetallic IrNiCu DNF with a rhombic dodecahedral morphology via selective etching. The use of single Ir precursor yielded single nanoframe structures, highlighting the importance of employing dual Ir precursors. In addition, the structure of Ir-based nanocrystals could be further controlled to DNF with octahedral morphology and CuNi@Ir core-shell structures via a simple tuning of experimental factors. The IrNiCu DNF exhibited high electrocatalytic activity for oxygen evolution reaction (OER) in acidic media, which is better than Ir/C catalyst. Furthermore, IrNiCu DNF demonstrated excellent durability for OER, which could be attributed to the frame structure that prevents the growth and agglomeration of particles as well as in situ formation of robust rutile IrO2 phase during prolonged operation.
AB - Nanoframe electrocatalysts have attracted great interest due to their inherently high active surface area per a given mass. Although recent progress has enabled the preparation of single nanoframe structures with a variety of morphologies, more complex nanoframe structures such as a double-layered nanoframe have not yet been realized. Herein, we report a rational synthetic strategy for a structurally robust Ir-based multimetallic double-layered nanoframe (DNF) structure, nanoframe@nanoframe. By leveraging the differing kinetics of dual Ir precursors and dual transition metal (Ni and Cu) precursors, a core-shell-type alloy@alloy structure could be generated in a simple one-step synthesis, which was subsequently transformed into a multimetallic IrNiCu DNF with a rhombic dodecahedral morphology via selective etching. The use of single Ir precursor yielded single nanoframe structures, highlighting the importance of employing dual Ir precursors. In addition, the structure of Ir-based nanocrystals could be further controlled to DNF with octahedral morphology and CuNi@Ir core-shell structures via a simple tuning of experimental factors. The IrNiCu DNF exhibited high electrocatalytic activity for oxygen evolution reaction (OER) in acidic media, which is better than Ir/C catalyst. Furthermore, IrNiCu DNF demonstrated excellent durability for OER, which could be attributed to the frame structure that prevents the growth and agglomeration of particles as well as in situ formation of robust rutile IrO2 phase during prolonged operation.
KW - electrocatalysis
KW - iridium-based nanocrystal
KW - kinetic control
KW - nanoframe
KW - oxygen evolution reaction
KW - ternary alloy
UR - http://www.scopus.com/inward/record.url?scp=85021439074&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85021439074&partnerID=8YFLogxK
U2 - 10.1021/acsnano.7b00233
DO - 10.1021/acsnano.7b00233
M3 - Article
VL - 11
SP - 5500
EP - 5509
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 6
ER -