Tunable Concave Surface Features of Mesoporous Palladium Nanocrystals Prepared from Supramolecular Micellar Templates

Muhammad Iqbal; Yena Kim; Adhitya Gandaryus Saputro; Ganes Shukri; Brian Yuliarto; Hyunsoo Lim; Hiroki Nara; Asma A. Alothman; Jongbeom Na; Yoshio Bando; Yusuke Yamauchi

doi:10.1021/acsami.0c13136

Tunable Concave Surface Features of Mesoporous Palladium Nanocrystals Prepared from Supramolecular Micellar Templates

Muhammad Iqbal, Yena Kim, Adhitya Gandaryus Saputro, Ganes Shukri, Brian Yuliarto, Hyunsoo Lim, Hiroki Nara, Asma A. Alothman, Jongbeom Na, Yoshio Bando, Yusuke Yamauchi

Research Organization for Nano & Life Innovation

Research output: Contribution to journal › Article › peer-review

Abstract

Concave metallic nanocrystals with a high density of low-coordinated atoms on the surface are essential for the realization of unique catalytic properties. Herein, mesoporous palladium nanocrystals (MPNs) that possess various degrees of curvature are successfully synthesized following an approach that relies on a facile polymeric micelle assembly approach. The as-prepared MPNs exhibit larger surface areas compared to conventional Pd nanocrystals and their nonporous counterparts. The MPNs display enhanced electrocatalytic activity for ethanol oxidation when compared to state-of-the-art commercial palladium black and conventional palladium nanocubes used as catalysts. Interestingly, as the degree of curvature increases, the surface-area-normalized activity also increases, demonstrating that the curvature of MPNs and the presence of high-index facets are crucial considerations for the design of electrocatalysts.

Original language	English
Journal	ACS Applied Materials and Interfaces
DOIs	https://doi.org/10.1021/acsami.0c13136
Publication status	Accepted/In press - 2020

Keywords

concave structure
density functional theory
mesoporous metals
micellar templates
negative curvature
palladium

ASJC Scopus subject areas

Materials Science(all)

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10.1021/acsami.0c13136

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Tunable Concave Surface Features of Mesoporous Palladium Nanocrystals Prepared from Supramolecular Micellar Templates. / Iqbal, Muhammad; Kim, Yena; Saputro, Adhitya Gandaryus; Shukri, Ganes; Yuliarto, Brian; Lim, Hyunsoo; Nara, Hiroki; Alothman, Asma A.; Na, Jongbeom; Bando, Yoshio; Yamauchi, Yusuke.

In: ACS Applied Materials and Interfaces, 2020.

Research output: Contribution to journal › Article › peer-review

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title = "Tunable Concave Surface Features of Mesoporous Palladium Nanocrystals Prepared from Supramolecular Micellar Templates",

abstract = "Concave metallic nanocrystals with a high density of low-coordinated atoms on the surface are essential for the realization of unique catalytic properties. Herein, mesoporous palladium nanocrystals (MPNs) that possess various degrees of curvature are successfully synthesized following an approach that relies on a facile polymeric micelle assembly approach. The as-prepared MPNs exhibit larger surface areas compared to conventional Pd nanocrystals and their nonporous counterparts. The MPNs display enhanced electrocatalytic activity for ethanol oxidation when compared to state-of-the-art commercial palladium black and conventional palladium nanocubes used as catalysts. Interestingly, as the degree of curvature increases, the surface-area-normalized activity also increases, demonstrating that the curvature of MPNs and the presence of high-index facets are crucial considerations for the design of electrocatalysts.",

keywords = "concave structure, density functional theory, mesoporous metals, micellar templates, negative curvature, palladium",

author = "Muhammad Iqbal and Yena Kim and Saputro, {Adhitya Gandaryus} and Ganes Shukri and Brian Yuliarto and Hyunsoo Lim and Hiroki Nara and Alothman, {Asma A.} and Jongbeom Na and Yoshio Bando and Yusuke Yamauchi",

note = "Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A3A03039037). This work also supported by the Researchers Supporting Project (RSP-2020/243), King Saud University, Riyadh, Saudi Arabia. This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and microfabrication facilities for Australian researchers.",

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AU - Saputro, Adhitya Gandaryus

AU - Shukri, Ganes

AU - Yuliarto, Brian

AU - Lim, Hyunsoo

AU - Nara, Hiroki

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AU - Na, Jongbeom

AU - Bando, Yoshio

AU - Yamauchi, Yusuke

N1 - Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2020R1A6A3A03039037). This work also supported by the Researchers Supporting Project (RSP-2020/243), King Saud University, Riyadh, Saudi Arabia. This work was also performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF-Q), a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and microfabrication facilities for Australian researchers.

PY - 2020

Y1 - 2020

N2 - Concave metallic nanocrystals with a high density of low-coordinated atoms on the surface are essential for the realization of unique catalytic properties. Herein, mesoporous palladium nanocrystals (MPNs) that possess various degrees of curvature are successfully synthesized following an approach that relies on a facile polymeric micelle assembly approach. The as-prepared MPNs exhibit larger surface areas compared to conventional Pd nanocrystals and their nonporous counterparts. The MPNs display enhanced electrocatalytic activity for ethanol oxidation when compared to state-of-the-art commercial palladium black and conventional palladium nanocubes used as catalysts. Interestingly, as the degree of curvature increases, the surface-area-normalized activity also increases, demonstrating that the curvature of MPNs and the presence of high-index facets are crucial considerations for the design of electrocatalysts.

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