Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability

Ahmad M. Harzandi; Sahar Shadman; Miran Ha; Chang Woo Myung; Dong Yeon Kim; Hyo Ju Park; Siraj Sultan; Woo Suk Noh; Wanggeun Lee; Pandiarajan Thangavel; Woo Jin Byun; Seong hun Lee; Jitendra N. Tiwari; Tae Joo Shin; Jae Hoon Park; Zonghoon Lee; Jae Sung Lee; Kwang S. Kim

doi:10.1016/j.apcatb.2020.118896

Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability

Ahmad M. Harzandi, Sahar Shadman, Miran Ha, Chang Woo Myung, Dong Yeon Kim, Hyo Ju Park, Siraj Sultan, Woo Suk Noh, Wanggeun Lee, Pandiarajan Thangavel, Woo Jin Byun, Seong hun Lee, Jitendra N. Tiwari, Tae Joo Shin, Jae Hoon Park, Zonghoon Lee, Jae Sung Lee, Kwang S. Kim

Department of Energy and Materials Engineering

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

119 Scopus citations

Abstract

Properties of metal elements can be modified by alloying. Given that catalytic efficiencies are often maximized using metal single-atoms (SAs), two immiscible metals can improve the catalytic activity when they can be present as non-agglomerated dual SAs. Here, we report yet-unexplored synthesis of high-performance electrocatalysts utilizing immiscibility of Cu/Ru bimetal atoms. In the synthesized electrocatalyst (Cu/Ru@G_N), both Cu-SAs and Ru-SAs are dispersed on N-doped graphitic-matrix (G_N), while other Cu-SAs are bridged to Ru nanoparticles (NPs) surface via nitrogen. It shows superior mass-activity with outstanding catalytic performance and durability for hydrogen evolution reaction (HER), outperforming commercial Pt_20wt%/C. Cu-SAs along with Ru-NPs enhance electric conduction or charge-transfer rate of G_N-templates for fast kinetics. Owing to Cu-Ru immiscibility, the coordination of Cu-SAs by N atoms which bridge to Ru-NPs surface, introduces new active sites and brings about long-term stability (over 600 h in acidic media) by preventing aggregation of Ru-NPs.

Original language	English
Article number	118896
Journal	Applied Catalysis B: Environmental
Volume	270
DOIs	https://doi.org/10.1016/j.apcatb.2020.118896
State	Published - 5 Aug 2020

Keywords

Charge transfer
Hydrogen evolution reaction
Immiscible bi-metals
Single-atoms

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Harzandi, A. M., Shadman, S., Ha, M., Myung, C. W., Kim, D. Y., Park, H. J., Sultan, S., Noh, W. S., Lee, W., Thangavel, P., Byun, W. J., Lee, S. H., Tiwari, J. N., Shin, T. J., Park, J. H., Lee, Z., Lee, J. S., & Kim, K. S. (2020). Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability. Applied Catalysis B: Environmental, 270, Article 118896. https://doi.org/10.1016/j.apcatb.2020.118896

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title = "Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability",

abstract = "Properties of metal elements can be modified by alloying. Given that catalytic efficiencies are often maximized using metal single-atoms (SAs), two immiscible metals can improve the catalytic activity when they can be present as non-agglomerated dual SAs. Here, we report yet-unexplored synthesis of high-performance electrocatalysts utilizing immiscibility of Cu/Ru bimetal atoms. In the synthesized electrocatalyst (Cu/Ru@GN), both Cu-SAs and Ru-SAs are dispersed on N-doped graphitic-matrix (GN), while other Cu-SAs are bridged to Ru nanoparticles (NPs) surface via nitrogen. It shows superior mass-activity with outstanding catalytic performance and durability for hydrogen evolution reaction (HER), outperforming commercial Pt20wt%/C. Cu-SAs along with Ru-NPs enhance electric conduction or charge-transfer rate of GN-templates for fast kinetics. Owing to Cu-Ru immiscibility, the coordination of Cu-SAs by N atoms which bridge to Ru-NPs surface, introduces new active sites and brings about long-term stability (over 600 h in acidic media) by preventing aggregation of Ru-NPs.",

keywords = "Charge transfer, Hydrogen evolution reaction, Immiscible bi-metals, Single-atoms",

author = "Harzandi, {Ahmad M.} and Sahar Shadman and Miran Ha and Myung, {Chang Woo} and Kim, {Dong Yeon} and Park, {Hyo Ju} and Siraj Sultan and Noh, {Woo Suk} and Wanggeun Lee and Pandiarajan Thangavel and Byun, {Woo Jin} and Lee, {Seong hun} and Tiwari, {Jitendra N.} and Shin, {Tae Joo} and Park, {Jae Hoon} and Zonghoon Lee and Lee, {Jae Sung} and Kim, {Kwang S.}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = aug,

day = "5",

doi = "10.1016/j.apcatb.2020.118896",

language = "English",

volume = "270",

journal = "Applied Catalysis B: Environmental",

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Harzandi, AM, Shadman, S, Ha, M, Myung, CW, Kim, DY, Park, HJ, Sultan, S, Noh, WS, Lee, W, Thangavel, P, Byun, WJ, Lee, SH, Tiwari, JN, Shin, TJ, Park, JH, Lee, Z, Lee, JS & Kim, KS 2020, 'Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability', Applied Catalysis B: Environmental, vol. 270, 118896. https://doi.org/10.1016/j.apcatb.2020.118896

TY - JOUR

T1 - Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability

AU - Harzandi, Ahmad M.

AU - Shadman, Sahar

AU - Ha, Miran

AU - Myung, Chang Woo

AU - Kim, Dong Yeon

AU - Park, Hyo Ju

AU - Sultan, Siraj

AU - Noh, Woo Suk

AU - Lee, Wanggeun

AU - Thangavel, Pandiarajan

AU - Byun, Woo Jin

AU - Lee, Seong hun

AU - Tiwari, Jitendra N.

AU - Shin, Tae Joo

AU - Park, Jae Hoon

AU - Lee, Zonghoon

AU - Lee, Jae Sung

AU - Kim, Kwang S.

PY - 2020/8/5

Y1 - 2020/8/5

N2 - Properties of metal elements can be modified by alloying. Given that catalytic efficiencies are often maximized using metal single-atoms (SAs), two immiscible metals can improve the catalytic activity when they can be present as non-agglomerated dual SAs. Here, we report yet-unexplored synthesis of high-performance electrocatalysts utilizing immiscibility of Cu/Ru bimetal atoms. In the synthesized electrocatalyst (Cu/Ru@GN), both Cu-SAs and Ru-SAs are dispersed on N-doped graphitic-matrix (GN), while other Cu-SAs are bridged to Ru nanoparticles (NPs) surface via nitrogen. It shows superior mass-activity with outstanding catalytic performance and durability for hydrogen evolution reaction (HER), outperforming commercial Pt20wt%/C. Cu-SAs along with Ru-NPs enhance electric conduction or charge-transfer rate of GN-templates for fast kinetics. Owing to Cu-Ru immiscibility, the coordination of Cu-SAs by N atoms which bridge to Ru-NPs surface, introduces new active sites and brings about long-term stability (over 600 h in acidic media) by preventing aggregation of Ru-NPs.

AB - Properties of metal elements can be modified by alloying. Given that catalytic efficiencies are often maximized using metal single-atoms (SAs), two immiscible metals can improve the catalytic activity when they can be present as non-agglomerated dual SAs. Here, we report yet-unexplored synthesis of high-performance electrocatalysts utilizing immiscibility of Cu/Ru bimetal atoms. In the synthesized electrocatalyst (Cu/Ru@GN), both Cu-SAs and Ru-SAs are dispersed on N-doped graphitic-matrix (GN), while other Cu-SAs are bridged to Ru nanoparticles (NPs) surface via nitrogen. It shows superior mass-activity with outstanding catalytic performance and durability for hydrogen evolution reaction (HER), outperforming commercial Pt20wt%/C. Cu-SAs along with Ru-NPs enhance electric conduction or charge-transfer rate of GN-templates for fast kinetics. Owing to Cu-Ru immiscibility, the coordination of Cu-SAs by N atoms which bridge to Ru-NPs surface, introduces new active sites and brings about long-term stability (over 600 h in acidic media) by preventing aggregation of Ru-NPs.

KW - Charge transfer

KW - Hydrogen evolution reaction

KW - Immiscible bi-metals

KW - Single-atoms

UR - http://www.scopus.com/inward/record.url?scp=85081974733&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2020.118896

DO - 10.1016/j.apcatb.2020.118896

M3 - Article

AN - SCOPUS:85081974733

SN - 0926-3373

VL - 270

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 118896

ER -

Immiscible bi-metal single-atoms driven synthesis of electrocatalysts having superb mass-activity and durability

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Keywords

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