Evolution of silver to a better electrocatalyst: Water-assisted oxygen reduction reaction at silver chloride nanowires in alkaline solution

Su jin Kim; Seung Cheol Lee; Chongmok Lee; Myung Hwa Kim; Youngmi Lee

doi:10.1016/j.nanoen.2018.03.041

Evolution of silver to a better electrocatalyst: Water-assisted oxygen reduction reaction at silver chloride nanowires in alkaline solution

Su jin Kim, Seung Cheol Lee, Chongmok Lee, Myung Hwa Kim, Youngmi Lee

Department of Chemistry & Nanoscience

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

27 Scopus citations

Abstract

Oxygen reduction reaction (ORR) is of great interest in various areas, including energy conversion. This paper presents the simple synthesis and characterization of one-dimensional silver halides nanowires (AgClNW and AgBrNW) as an electrocatalyst for ORR in alkaline media, as well as an investigation of the ORR pathway at AgCl. AgClNW and AgBrNW were prepared via a galvanic replacement reaction (GRR) between silver nanowires (AgNW) and a halide precursor. AgClNW exhibited excellent ORR catalytic activity that was comparable to or better than that for commercial Pt (20 wt% Pt loading on Vulcan carbon), demonstrating potential to replace Pt-based catalysts. A scanning electrochemical microscopy (SECM) analysis supports the existence of an associative ORR pathway at AgCl, and first-principles density functional theory (DFT) calculations suggest that the high ORR activity of AgCl is possibly attributed to the up-shifted Ag d-band center energy in AgCl as well as the assistance of adsorbed water molecules.

Original language	English
Pages (from-to)	134-143
Number of pages	10
Journal	Nano Energy
Volume	48
DOIs	https://doi.org/10.1016/j.nanoen.2018.03.041
State	Published - Jun 2018

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning ( NRF-2017R1A2A2A14001137 ) and the National Institute of Supercomputing and Network/Korea Institute of Science and Technology Information with supercomputing resources including technical support ( KSC-2014-C1–037 ).

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

DFT calculation
Electrocatalysis
Nanowires
Oxygen reduction reaction
Silver halide

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoen.2018.03.041

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title = "Evolution of silver to a better electrocatalyst: Water-assisted oxygen reduction reaction at silver chloride nanowires in alkaline solution",

abstract = "Oxygen reduction reaction (ORR) is of great interest in various areas, including energy conversion. This paper presents the simple synthesis and characterization of one-dimensional silver halides nanowires (AgClNW and AgBrNW) as an electrocatalyst for ORR in alkaline media, as well as an investigation of the ORR pathway at AgCl. AgClNW and AgBrNW were prepared via a galvanic replacement reaction (GRR) between silver nanowires (AgNW) and a halide precursor. AgClNW exhibited excellent ORR catalytic activity that was comparable to or better than that for commercial Pt (20 wt% Pt loading on Vulcan carbon), demonstrating potential to replace Pt-based catalysts. A scanning electrochemical microscopy (SECM) analysis supports the existence of an associative ORR pathway at AgCl, and first-principles density functional theory (DFT) calculations suggest that the high ORR activity of AgCl is possibly attributed to the up-shifted Ag d-band center energy in AgCl as well as the assistance of adsorbed water molecules.",

keywords = "DFT calculation, Electrocatalysis, Nanowires, Oxygen reduction reaction, Silver halide",

author = "Kim, {Su jin} and Lee, {Seung Cheol} and Chongmok Lee and Kim, {Myung Hwa} and Youngmi Lee",

note = "Funding Information: This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning ( NRF-2017R1A2A2A14001137 ) and the National Institute of Supercomputing and Network/Korea Institute of Science and Technology Information with supercomputing resources including technical support ( KSC-2014-C1–037 ). Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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doi = "10.1016/j.nanoen.2018.03.041",

language = "English",

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pages = "134--143",

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AU - Kim, Su jin

AU - Lee, Seung Cheol

AU - Lee, Chongmok

AU - Kim, Myung Hwa

AU - Lee, Youngmi

N1 - Funding Information: This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning ( NRF-2017R1A2A2A14001137 ) and the National Institute of Supercomputing and Network/Korea Institute of Science and Technology Information with supercomputing resources including technical support ( KSC-2014-C1–037 ). Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/6

Y1 - 2018/6

N2 - Oxygen reduction reaction (ORR) is of great interest in various areas, including energy conversion. This paper presents the simple synthesis and characterization of one-dimensional silver halides nanowires (AgClNW and AgBrNW) as an electrocatalyst for ORR in alkaline media, as well as an investigation of the ORR pathway at AgCl. AgClNW and AgBrNW were prepared via a galvanic replacement reaction (GRR) between silver nanowires (AgNW) and a halide precursor. AgClNW exhibited excellent ORR catalytic activity that was comparable to or better than that for commercial Pt (20 wt% Pt loading on Vulcan carbon), demonstrating potential to replace Pt-based catalysts. A scanning electrochemical microscopy (SECM) analysis supports the existence of an associative ORR pathway at AgCl, and first-principles density functional theory (DFT) calculations suggest that the high ORR activity of AgCl is possibly attributed to the up-shifted Ag d-band center energy in AgCl as well as the assistance of adsorbed water molecules.

AB - Oxygen reduction reaction (ORR) is of great interest in various areas, including energy conversion. This paper presents the simple synthesis and characterization of one-dimensional silver halides nanowires (AgClNW and AgBrNW) as an electrocatalyst for ORR in alkaline media, as well as an investigation of the ORR pathway at AgCl. AgClNW and AgBrNW were prepared via a galvanic replacement reaction (GRR) between silver nanowires (AgNW) and a halide precursor. AgClNW exhibited excellent ORR catalytic activity that was comparable to or better than that for commercial Pt (20 wt% Pt loading on Vulcan carbon), demonstrating potential to replace Pt-based catalysts. A scanning electrochemical microscopy (SECM) analysis supports the existence of an associative ORR pathway at AgCl, and first-principles density functional theory (DFT) calculations suggest that the high ORR activity of AgCl is possibly attributed to the up-shifted Ag d-band center energy in AgCl as well as the assistance of adsorbed water molecules.

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Evolution of silver to a better electrocatalyst: Water-assisted oxygen reduction reaction at silver chloride nanowires in alkaline solution

Abstract

Bibliographical note

Keywords

UN SDGs

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