Unraveling the importance of controlled architecture in bimetallic multilayer electrode toward efficient electrocatalyst

Minsu Gu, Byeong-Su Kim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Even though traditional electrode fabrication methods such as simple mixing process have been used in various energy storage and conversion devices due to its handiness, these methods could not fully utilize and maximize the intrinsic properties of each active material. With the limited control over the internal structure of the electrode, it also often poses a significant challenge to elucidate the structure-property relationship between components within the electrode. Taking advantages of versatile layer-by-layer (LbL) assembly which can tailor nano-architecture of hybrid electrodes, here we report electrocatalytic thin films for methanol oxidation by adjusting the assembly sequence of LbL films composed of the Au and Pd nanoparticles (NPs) and graphene oxide (GO) nanosheets. In case of co-assembled bimetallic LbL structure of (GO/Au/GO/Pd)n where respective Au and Pd NPs are supported with GO nanosheets, the electrocatalytic activity is significantly higher than that of respective monometallic LbL electrode (i.e. (GO/Au)n and (GO/Pd)n). To further investigate the architecture effect on the electrochemical behavior, Au and Pd NPs are assembled with GO in a different relative position of hybrid multilayer electrodes. It is proved that the electrocatalytic activity can be highly tunable by the position of metal NPs in the LbL structure, suggesting the structural dependence of charge and mass transfer between the electrolyte and the electrode, which is otherwise impossible to investigate in a simple conventional electrode fabrication method. Because of the highly tunable properties of LbL assembled electrodes coupled with electrocatalytic NPs, we anticipate that the general concept presented here will offer new insights in the nanoscale control over the architecture of the electrode toward development of novel electroactive catalysts.

Original languageEnglish
Pages (from-to)658-666
Number of pages9
JournalNano Energy
Volume30
DOIs
Publication statusPublished - 2016 Dec 1

Fingerprint

Electrocatalysts
Graphite
Multilayers
Oxides
Graphene
Electrodes
Nanoparticles
Nanosheets
Fabrication
Metal nanoparticles
Energy conversion
Energy storage
Electrolytes
Methanol
Charge transfer
Mass transfer
Thin films
Oxidation
Catalysts

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

Cite this

@article{b0e0109831994d2c89720b063bc0b897,
title = "Unraveling the importance of controlled architecture in bimetallic multilayer electrode toward efficient electrocatalyst",
abstract = "Even though traditional electrode fabrication methods such as simple mixing process have been used in various energy storage and conversion devices due to its handiness, these methods could not fully utilize and maximize the intrinsic properties of each active material. With the limited control over the internal structure of the electrode, it also often poses a significant challenge to elucidate the structure-property relationship between components within the electrode. Taking advantages of versatile layer-by-layer (LbL) assembly which can tailor nano-architecture of hybrid electrodes, here we report electrocatalytic thin films for methanol oxidation by adjusting the assembly sequence of LbL films composed of the Au and Pd nanoparticles (NPs) and graphene oxide (GO) nanosheets. In case of co-assembled bimetallic LbL structure of (GO/Au/GO/Pd)n where respective Au and Pd NPs are supported with GO nanosheets, the electrocatalytic activity is significantly higher than that of respective monometallic LbL electrode (i.e. (GO/Au)n and (GO/Pd)n). To further investigate the architecture effect on the electrochemical behavior, Au and Pd NPs are assembled with GO in a different relative position of hybrid multilayer electrodes. It is proved that the electrocatalytic activity can be highly tunable by the position of metal NPs in the LbL structure, suggesting the structural dependence of charge and mass transfer between the electrolyte and the electrode, which is otherwise impossible to investigate in a simple conventional electrode fabrication method. Because of the highly tunable properties of LbL assembled electrodes coupled with electrocatalytic NPs, we anticipate that the general concept presented here will offer new insights in the nanoscale control over the architecture of the electrode toward development of novel electroactive catalysts.",
author = "Minsu Gu and Byeong-Su Kim",
year = "2016",
month = "12",
day = "1",
doi = "10.1016/j.nanoen.2016.11.001",
language = "English",
volume = "30",
pages = "658--666",
journal = "Nano Energy",
issn = "2211-2855",
publisher = "Elsevier BV",

}

Unraveling the importance of controlled architecture in bimetallic multilayer electrode toward efficient electrocatalyst. / Gu, Minsu; Kim, Byeong-Su.

In: Nano Energy, Vol. 30, 01.12.2016, p. 658-666.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Unraveling the importance of controlled architecture in bimetallic multilayer electrode toward efficient electrocatalyst

AU - Gu, Minsu

AU - Kim, Byeong-Su

PY - 2016/12/1

Y1 - 2016/12/1

N2 - Even though traditional electrode fabrication methods such as simple mixing process have been used in various energy storage and conversion devices due to its handiness, these methods could not fully utilize and maximize the intrinsic properties of each active material. With the limited control over the internal structure of the electrode, it also often poses a significant challenge to elucidate the structure-property relationship between components within the electrode. Taking advantages of versatile layer-by-layer (LbL) assembly which can tailor nano-architecture of hybrid electrodes, here we report electrocatalytic thin films for methanol oxidation by adjusting the assembly sequence of LbL films composed of the Au and Pd nanoparticles (NPs) and graphene oxide (GO) nanosheets. In case of co-assembled bimetallic LbL structure of (GO/Au/GO/Pd)n where respective Au and Pd NPs are supported with GO nanosheets, the electrocatalytic activity is significantly higher than that of respective monometallic LbL electrode (i.e. (GO/Au)n and (GO/Pd)n). To further investigate the architecture effect on the electrochemical behavior, Au and Pd NPs are assembled with GO in a different relative position of hybrid multilayer electrodes. It is proved that the electrocatalytic activity can be highly tunable by the position of metal NPs in the LbL structure, suggesting the structural dependence of charge and mass transfer between the electrolyte and the electrode, which is otherwise impossible to investigate in a simple conventional electrode fabrication method. Because of the highly tunable properties of LbL assembled electrodes coupled with electrocatalytic NPs, we anticipate that the general concept presented here will offer new insights in the nanoscale control over the architecture of the electrode toward development of novel electroactive catalysts.

AB - Even though traditional electrode fabrication methods such as simple mixing process have been used in various energy storage and conversion devices due to its handiness, these methods could not fully utilize and maximize the intrinsic properties of each active material. With the limited control over the internal structure of the electrode, it also often poses a significant challenge to elucidate the structure-property relationship between components within the electrode. Taking advantages of versatile layer-by-layer (LbL) assembly which can tailor nano-architecture of hybrid electrodes, here we report electrocatalytic thin films for methanol oxidation by adjusting the assembly sequence of LbL films composed of the Au and Pd nanoparticles (NPs) and graphene oxide (GO) nanosheets. In case of co-assembled bimetallic LbL structure of (GO/Au/GO/Pd)n where respective Au and Pd NPs are supported with GO nanosheets, the electrocatalytic activity is significantly higher than that of respective monometallic LbL electrode (i.e. (GO/Au)n and (GO/Pd)n). To further investigate the architecture effect on the electrochemical behavior, Au and Pd NPs are assembled with GO in a different relative position of hybrid multilayer electrodes. It is proved that the electrocatalytic activity can be highly tunable by the position of metal NPs in the LbL structure, suggesting the structural dependence of charge and mass transfer between the electrolyte and the electrode, which is otherwise impossible to investigate in a simple conventional electrode fabrication method. Because of the highly tunable properties of LbL assembled electrodes coupled with electrocatalytic NPs, we anticipate that the general concept presented here will offer new insights in the nanoscale control over the architecture of the electrode toward development of novel electroactive catalysts.

UR - http://www.scopus.com/inward/record.url?scp=85003680899&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85003680899&partnerID=8YFLogxK

U2 - 10.1016/j.nanoen.2016.11.001

DO - 10.1016/j.nanoen.2016.11.001

M3 - Article

VL - 30

SP - 658

EP - 666

JO - Nano Energy

JF - Nano Energy

SN - 2211-2855

ER -