Synergistic effect of iron diselenide decorated multi-walled carbon nanotubes for enhanced heterogeneous electron transfer and electrochemical hydrogen evolution

Swagotom Sarker; Pavan Chaturvedi; Litao Yan; Tom Nakotte; Xinqi Chen; Stephanie K. Richins; Sanjib Das; Jonathan Peters; Meng Zhou; Sergei N. Smirnov; Hongmei Luo

doi:10.1016/j.electacta.2018.03.064

Synergistic effect of iron diselenide decorated multi-walled carbon nanotubes for enhanced heterogeneous electron transfer and electrochemical hydrogen evolution

Swagotom Sarker, Pavan Chaturvedi, Litao Yan, Tom Nakotte, Xinqi Chen, Stephanie K. Richins, Sanjib Das, Jonathan Peters, Meng Zhou, Sergei N. Smirnov^*, Hongmei Luo

^*Corresponding author for this work

NUANCE - Atomic and Nanoscale Characterization Experimental Center

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

18 Scopus citations

Abstract

Iron diselenide (FeSe₂) has been of recent interest as a potentially useful electrode material. Here we demonstrate, for the first time, the synergistic effect between multi-walled carbon nanotubes (MWCNT) and FeSe₂ in a form of MWCNT/FeSe₂ composite, for the heterogeneous electron transfer (HET) reaction with the [Ru(NH₃)₆]^3+/2+ redox probe and the electrochemical hydrogen evolution reaction (HER) in acidic media. Plain FeSe₂ and the MWCNT/FeSe₂ composite were synthesized using a one-pot hydrothermal method. Although all electrode materials (pristine MWCNT, FeSe₂, and MWCNT/FeSe₂) show a quasi-reversible electrode behavior, MWCNT/FeSe₂ has a smaller peak separation potential and exhibits an enhanced HET rate constant, k⁰ = 5.4 × 10⁻³ cm/s, which is 3.2 and 1.6 times higher than that of FeSe₂ and MWCNT, respectively. Similarly, the HER performance of the composite demonstrates a smaller Tafel slope of 70 mV/dec and a reduced overpotential. We anticipate that such promising outcome can be further improved by employing different morphologies of FeSe₂ and engineered interaction with other conductive supports suitable for their applications in electrochemical sensing and energy conversion.

Original language	English (US)
Pages (from-to)	138-146
Number of pages	9
Journal	Electrochimica Acta
Volume	270
DOIs	https://doi.org/10.1016/j.electacta.2018.03.064
State	Published - Apr 20 2018

Funding

Dr. Luo thanks the support from New Mexico EPSCoR ( NSF-1301346 ) and the USDA National Institute of Food and Agriculture , HSI Collaboration: Integrating Food Science/Engineering and Education Network ( IFSEEN , award number: 2015-38422-24059 ). This work made use of the Keck-II facility of Northwestern University's NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource ( NSF ECCS-1542205 ); the MRSEC program ( NSF DMR-1121262 ) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. We also acknowledge the TEM facility at the Los Alamos National Laboratory, NM. Dr. Luo thanks the support from New Mexico EPSCoR (NSF-1301346) and the USDA National Institute of Food and Agriculture, HSI Collaboration: Integrating Food Science/Engineering and Education Network (IFSEEN, award number: 2015-38422-24059). This work made use of the Keck-II facility of Northwestern University's NUANCE Center, which has received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1121262) at the Materials Research Center; the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois, through the IIN. We also acknowledge the TEM facility at the Los Alamos National Laboratory, NM.

Keywords

FeSe
Heterogeneous electron transfer
Hydrogen evolution reaction
Hydrothermal synthesis
MWCNT
Synergistic effect

ASJC Scopus subject areas

General Chemical Engineering
Electrochemistry

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10.1016/j.electacta.2018.03.064

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Sarker, S., Chaturvedi, P., Yan, L., Nakotte, T., Chen, X., Richins, S. K., Das, S., Peters, J., Zhou, M., Smirnov, S. N., & Luo, H. (2018). Synergistic effect of iron diselenide decorated multi-walled carbon nanotubes for enhanced heterogeneous electron transfer and electrochemical hydrogen evolution. Electrochimica Acta, 270, 138-146. https://doi.org/10.1016/j.electacta.2018.03.064

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title = "Synergistic effect of iron diselenide decorated multi-walled carbon nanotubes for enhanced heterogeneous electron transfer and electrochemical hydrogen evolution",

abstract = "Iron diselenide (FeSe2) has been of recent interest as a potentially useful electrode material. Here we demonstrate, for the first time, the synergistic effect between multi-walled carbon nanotubes (MWCNT) and FeSe2 in a form of MWCNT/FeSe2 composite, for the heterogeneous electron transfer (HET) reaction with the [Ru(NH3)6]3+/2+ redox probe and the electrochemical hydrogen evolution reaction (HER) in acidic media. Plain FeSe2 and the MWCNT/FeSe2 composite were synthesized using a one-pot hydrothermal method. Although all electrode materials (pristine MWCNT, FeSe2, and MWCNT/FeSe2) show a quasi-reversible electrode behavior, MWCNT/FeSe2 has a smaller peak separation potential and exhibits an enhanced HET rate constant, k0 = 5.4 × 10−3 cm/s, which is 3.2 and 1.6 times higher than that of FeSe2 and MWCNT, respectively. Similarly, the HER performance of the composite demonstrates a smaller Tafel slope of 70 mV/dec and a reduced overpotential. We anticipate that such promising outcome can be further improved by employing different morphologies of FeSe2 and engineered interaction with other conductive supports suitable for their applications in electrochemical sensing and energy conversion.",

keywords = "FeSe, Heterogeneous electron transfer, Hydrogen evolution reaction, Hydrothermal synthesis, MWCNT, Synergistic effect",

author = "Swagotom Sarker and Pavan Chaturvedi and Litao Yan and Tom Nakotte and Xinqi Chen and Richins, {Stephanie K.} and Sanjib Das and Jonathan Peters and Meng Zhou and Smirnov, {Sergei N.} and Hongmei Luo",

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doi = "10.1016/j.electacta.2018.03.064",

language = "English (US)",

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Sarker, S, Chaturvedi, P, Yan, L, Nakotte, T, Chen, X, Richins, SK, Das, S, Peters, J, Zhou, M, Smirnov, SN & Luo, H 2018, 'Synergistic effect of iron diselenide decorated multi-walled carbon nanotubes for enhanced heterogeneous electron transfer and electrochemical hydrogen evolution', Electrochimica Acta, vol. 270, pp. 138-146. https://doi.org/10.1016/j.electacta.2018.03.064

TY - JOUR

T1 - Synergistic effect of iron diselenide decorated multi-walled carbon nanotubes for enhanced heterogeneous electron transfer and electrochemical hydrogen evolution

AU - Sarker, Swagotom

AU - Chaturvedi, Pavan

AU - Yan, Litao

AU - Nakotte, Tom

AU - Chen, Xinqi

AU - Richins, Stephanie K.

AU - Das, Sanjib

AU - Peters, Jonathan

AU - Zhou, Meng

AU - Smirnov, Sergei N.

AU - Luo, Hongmei

PY - 2018/4/20

Y1 - 2018/4/20

N2 - Iron diselenide (FeSe2) has been of recent interest as a potentially useful electrode material. Here we demonstrate, for the first time, the synergistic effect between multi-walled carbon nanotubes (MWCNT) and FeSe2 in a form of MWCNT/FeSe2 composite, for the heterogeneous electron transfer (HET) reaction with the [Ru(NH3)6]3+/2+ redox probe and the electrochemical hydrogen evolution reaction (HER) in acidic media. Plain FeSe2 and the MWCNT/FeSe2 composite were synthesized using a one-pot hydrothermal method. Although all electrode materials (pristine MWCNT, FeSe2, and MWCNT/FeSe2) show a quasi-reversible electrode behavior, MWCNT/FeSe2 has a smaller peak separation potential and exhibits an enhanced HET rate constant, k0 = 5.4 × 10−3 cm/s, which is 3.2 and 1.6 times higher than that of FeSe2 and MWCNT, respectively. Similarly, the HER performance of the composite demonstrates a smaller Tafel slope of 70 mV/dec and a reduced overpotential. We anticipate that such promising outcome can be further improved by employing different morphologies of FeSe2 and engineered interaction with other conductive supports suitable for their applications in electrochemical sensing and energy conversion.

AB - Iron diselenide (FeSe2) has been of recent interest as a potentially useful electrode material. Here we demonstrate, for the first time, the synergistic effect between multi-walled carbon nanotubes (MWCNT) and FeSe2 in a form of MWCNT/FeSe2 composite, for the heterogeneous electron transfer (HET) reaction with the [Ru(NH3)6]3+/2+ redox probe and the electrochemical hydrogen evolution reaction (HER) in acidic media. Plain FeSe2 and the MWCNT/FeSe2 composite were synthesized using a one-pot hydrothermal method. Although all electrode materials (pristine MWCNT, FeSe2, and MWCNT/FeSe2) show a quasi-reversible electrode behavior, MWCNT/FeSe2 has a smaller peak separation potential and exhibits an enhanced HET rate constant, k0 = 5.4 × 10−3 cm/s, which is 3.2 and 1.6 times higher than that of FeSe2 and MWCNT, respectively. Similarly, the HER performance of the composite demonstrates a smaller Tafel slope of 70 mV/dec and a reduced overpotential. We anticipate that such promising outcome can be further improved by employing different morphologies of FeSe2 and engineered interaction with other conductive supports suitable for their applications in electrochemical sensing and energy conversion.

KW - FeSe

KW - Heterogeneous electron transfer

KW - Hydrogen evolution reaction

KW - Hydrothermal synthesis

KW - MWCNT

KW - Synergistic effect

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DO - 10.1016/j.electacta.2018.03.064

M3 - Article

AN - SCOPUS:85043993468

SN - 0013-4686

VL - 270

SP - 138

EP - 146

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Synergistic effect of iron diselenide decorated multi-walled carbon nanotubes for enhanced heterogeneous electron transfer and electrochemical hydrogen evolution

Abstract

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Keywords

ASJC Scopus subject areas

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