The relationship of morphology and catalytic activity: A case study of iron corrole incorporated in high surface area carbon supports

Naomi Levy; Oran Lori; Shmuel Gonen; Michal Mizrahi; Sharon Ruthstein; Lior Elbaz

doi:10.1016/j.carbon.2019.12.012

The relationship of morphology and catalytic activity: A case study of iron corrole incorporated in high surface area carbon supports

Naomi Levy, Oran Lori, Shmuel Gonen, Michal Mizrahi, Sharon Ruthstein, Lior Elbaz

Department of Chemistry

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

25 Scopus citations

Abstract

Metallo-corroles have shown to have unique catalytic properties for oxygen reduction when adsorbed on a high surface area carbon such as BP2000. The nature of the interaction between carbon surfaces and metallo-corroles has yet to be identified. This work suggests that the catalytic activity lays not in a bond between the carbon surface and the corrole molecule, but rather in the arrangement of corrole molecules within the porous structure of the carbon surface. This hypothesis was studied here using Electron Paramagnetic Resonance (EPR), X-ray diffraction (XRD), UV-VIS spectroscopy, elemental analysis, N₂ adsorption and several electrochemical methods. BP2000 carbon was compared to four other carbons with different properties (oxygen surface groups, surface area, porous structure and crystallinity). All of these show that the Fe-corrole that was incorporated in BP2000 tends to adsorb in pores of 20–25 nm in diameter, which allow synergistic effects to take place, and enhance the electrocatalysis of oxygen reduction reaction.

Original language	English
Pages (from-to)	238-243
Number of pages	6
Journal	Carbon
Volume	158
DOIs	https://doi.org/10.1016/j.carbon.2019.12.012
State	Published - Mar 2020

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Funding

This work was supported by the Israel Ministry of Science awarded to SR and LE. SG and OL would like to thank the Ministry of Science for their fellowship. This work was done in the framework of the Israeli Fuel Cell Consortium (IFCC; part of the Israel National Center for Electrochemical Propulsion, funded by The Israeli Fuel Choices and Smart Mobility Initiative and VATAT ) Appendix A This work was supported by the Israel Ministry of Science awarded to SR and LE. SG and OL would like to thank the Ministry of Science for their fellowship. This work was done in the framework of the Israeli Fuel Cell Consortium (IFCC; part of the Israel National Center for Electrochemical Propulsion, funded by The Israeli Fuel Choices and Smart Mobility Initiative and VATAT)

Funders	Funder number
Israeli Fuel Cell Consortium
Ministry of Science
VATAT
Ministry of science and technology, Israel	SG
Israel National Research Center for Electrochemical Propulsion

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10.1016/j.carbon.2019.12.012

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title = "The relationship of morphology and catalytic activity: A case study of iron corrole incorporated in high surface area carbon supports",

abstract = "Metallo-corroles have shown to have unique catalytic properties for oxygen reduction when adsorbed on a high surface area carbon such as BP2000. The nature of the interaction between carbon surfaces and metallo-corroles has yet to be identified. This work suggests that the catalytic activity lays not in a bond between the carbon surface and the corrole molecule, but rather in the arrangement of corrole molecules within the porous structure of the carbon surface. This hypothesis was studied here using Electron Paramagnetic Resonance (EPR), X-ray diffraction (XRD), UV-VIS spectroscopy, elemental analysis, N2 adsorption and several electrochemical methods. BP2000 carbon was compared to four other carbons with different properties (oxygen surface groups, surface area, porous structure and crystallinity). All of these show that the Fe-corrole that was incorporated in BP2000 tends to adsorb in pores of 20–25 nm in diameter, which allow synergistic effects to take place, and enhance the electrocatalysis of oxygen reduction reaction.",

author = "Naomi Levy and Oran Lori and Shmuel Gonen and Michal Mizrahi and Sharon Ruthstein and Lior Elbaz",

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AU - Lori, Oran

AU - Gonen, Shmuel

AU - Mizrahi, Michal

AU - Ruthstein, Sharon

AU - Elbaz, Lior

PY - 2020/3

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N2 - Metallo-corroles have shown to have unique catalytic properties for oxygen reduction when adsorbed on a high surface area carbon such as BP2000. The nature of the interaction between carbon surfaces and metallo-corroles has yet to be identified. This work suggests that the catalytic activity lays not in a bond between the carbon surface and the corrole molecule, but rather in the arrangement of corrole molecules within the porous structure of the carbon surface. This hypothesis was studied here using Electron Paramagnetic Resonance (EPR), X-ray diffraction (XRD), UV-VIS spectroscopy, elemental analysis, N2 adsorption and several electrochemical methods. BP2000 carbon was compared to four other carbons with different properties (oxygen surface groups, surface area, porous structure and crystallinity). All of these show that the Fe-corrole that was incorporated in BP2000 tends to adsorb in pores of 20–25 nm in diameter, which allow synergistic effects to take place, and enhance the electrocatalysis of oxygen reduction reaction.

AB - Metallo-corroles have shown to have unique catalytic properties for oxygen reduction when adsorbed on a high surface area carbon such as BP2000. The nature of the interaction between carbon surfaces and metallo-corroles has yet to be identified. This work suggests that the catalytic activity lays not in a bond between the carbon surface and the corrole molecule, but rather in the arrangement of corrole molecules within the porous structure of the carbon surface. This hypothesis was studied here using Electron Paramagnetic Resonance (EPR), X-ray diffraction (XRD), UV-VIS spectroscopy, elemental analysis, N2 adsorption and several electrochemical methods. BP2000 carbon was compared to four other carbons with different properties (oxygen surface groups, surface area, porous structure and crystallinity). All of these show that the Fe-corrole that was incorporated in BP2000 tends to adsorb in pores of 20–25 nm in diameter, which allow synergistic effects to take place, and enhance the electrocatalysis of oxygen reduction reaction.

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SN - 0008-6223

VL - 158

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JO - Carbon

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The relationship of morphology and catalytic activity: A case study of iron corrole incorporated in high surface area carbon supports

Abstract

Bibliographical note

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