Revealing structure-activity links in hydrazine oxidation: Doping and nanostructure in carbide-carbon electrocatalysts

Tomer Y. Burshtein; Eliyahu M. Farber; Kasinath Ojha; David Eisenberg

doi:https://doi.org/10.1039/c9ta03357b

Revealing structure-activity links in hydrazine oxidation: Doping and nanostructure in carbide-carbon electrocatalysts

Tomer Y. Burshtein, Eliyahu M. Farber, Kasinath Ojha, David Eisenberg

Technion - Israel Institute of Technology

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

Abstract

To expand the range of hydrazine oxidation catalysts active in alkaline pH-a key challenge in fuel cell electrocatalysis-we studied the effect of doping on carbide-carbon composites. Pyrolysis of organometallic precursors based on Fe-M cores (M = Fe/Zn/Cu) yielded Fe₃C-embedded, N-doped, hierarchically porous, graphitic carbons. These multi-doped materials showed excellent hydrazine oxidation activity (onset 0.28 V vs. RHE at pH = 14). Doping enhanced activity by nanostructural effects, rather than purely catalytic effects, as revealed by electrochemical and material investigations (XRD, XPS, SEM, TEM, Raman and N₂ porosimetry). Zinc and copper boosted microporosity in the carbons by two different mechanisms-either gas phase etching by Zn_(g) vapors, or enhanced exfoliation of well-dispersed Cu_(s) nanoparticles upon reaction with acid.

Original language	English
Pages (from-to)	23854-23861
Number of pages	8
Journal	Journal of Materials Chemistry A
Volume	7
Issue number	41
DOIs	https://doi.org/10.1039/c9ta03357b
State	Published - 2019

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Renewable Energy, Sustainability and the Environment

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title = "Revealing structure-activity links in hydrazine oxidation: Doping and nanostructure in carbide-carbon electrocatalysts",

abstract = "To expand the range of hydrazine oxidation catalysts active in alkaline pH-a key challenge in fuel cell electrocatalysis-we studied the effect of doping on carbide-carbon composites. Pyrolysis of organometallic precursors based on Fe-M cores (M = Fe/Zn/Cu) yielded Fe3C-embedded, N-doped, hierarchically porous, graphitic carbons. These multi-doped materials showed excellent hydrazine oxidation activity (onset 0.28 V vs. RHE at pH = 14). Doping enhanced activity by nanostructural effects, rather than purely catalytic effects, as revealed by electrochemical and material investigations (XRD, XPS, SEM, TEM, Raman and N2 porosimetry). Zinc and copper boosted microporosity in the carbons by two different mechanisms-either gas phase etching by Zn(g) vapors, or enhanced exfoliation of well-dispersed Cu(s) nanoparticles upon reaction with acid.",

author = "Burshtein, {Tomer Y.} and Farber, {Eliyahu M.} and Kasinath Ojha and David Eisenberg",

note = "Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",

year = "2019",

doi = "https://doi.org/10.1039/c9ta03357b",

language = "الإنجليزيّة",

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T1 - Revealing structure-activity links in hydrazine oxidation

T2 - Doping and nanostructure in carbide-carbon electrocatalysts

AU - Burshtein, Tomer Y.

AU - Farber, Eliyahu M.

AU - Ojha, Kasinath

AU - Eisenberg, David

PY - 2019

Y1 - 2019

N2 - To expand the range of hydrazine oxidation catalysts active in alkaline pH-a key challenge in fuel cell electrocatalysis-we studied the effect of doping on carbide-carbon composites. Pyrolysis of organometallic precursors based on Fe-M cores (M = Fe/Zn/Cu) yielded Fe3C-embedded, N-doped, hierarchically porous, graphitic carbons. These multi-doped materials showed excellent hydrazine oxidation activity (onset 0.28 V vs. RHE at pH = 14). Doping enhanced activity by nanostructural effects, rather than purely catalytic effects, as revealed by electrochemical and material investigations (XRD, XPS, SEM, TEM, Raman and N2 porosimetry). Zinc and copper boosted microporosity in the carbons by two different mechanisms-either gas phase etching by Zn(g) vapors, or enhanced exfoliation of well-dispersed Cu(s) nanoparticles upon reaction with acid.

AB - To expand the range of hydrazine oxidation catalysts active in alkaline pH-a key challenge in fuel cell electrocatalysis-we studied the effect of doping on carbide-carbon composites. Pyrolysis of organometallic precursors based on Fe-M cores (M = Fe/Zn/Cu) yielded Fe3C-embedded, N-doped, hierarchically porous, graphitic carbons. These multi-doped materials showed excellent hydrazine oxidation activity (onset 0.28 V vs. RHE at pH = 14). Doping enhanced activity by nanostructural effects, rather than purely catalytic effects, as revealed by electrochemical and material investigations (XRD, XPS, SEM, TEM, Raman and N2 porosimetry). Zinc and copper boosted microporosity in the carbons by two different mechanisms-either gas phase etching by Zn(g) vapors, or enhanced exfoliation of well-dispersed Cu(s) nanoparticles upon reaction with acid.

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U2 - https://doi.org/10.1039/c9ta03357b

DO - https://doi.org/10.1039/c9ta03357b

M3 - مقالة

SN - 2050-7488

VL - 7

SP - 23854

EP - 23861

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 41

ER -

Revealing structure-activity links in hydrazine oxidation: Doping and nanostructure in carbide-carbon electrocatalysts

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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