Selenium-Coupled Reduced Graphene Oxide as Single-Atom Site Catalyst for Direct Four-Electron Oxygen Reduction Reaction

Shubhadeep Pal; Sumit Bawari; Thazhe Veettil Vineesh; Naresh Shyaga; Tharangattu N. Narayanan

doi:10.1021/acsaem.9b00364

Selenium-Coupled Reduced Graphene Oxide as Single-Atom Site Catalyst for Direct Four-Electron Oxygen Reduction Reaction

Shubhadeep Pal, Sumit Bawari, Thazhe Veettil Vineesh, Naresh Shyaga, Tharangattu N. Narayanan

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

27 Scopus citations

Abstract

A single-atom site catalyst for direct four electron oxygen reduction reaction (ORR) is identified where selenium (ultrasmall amount of Se, 1 at. %) is the active center that couples reduced graphene oxide (rGO) sheets. This metal-free catalyst is found to be undergoing ORR through the direct four-electron pathway in alkaline medium, similar to platinum, whereas rGO prefers a two-electron path, and the experimental observation is correlated with theoretical study. The role of Se-like elements in graphene, which have similar electronegativity as carbon, is unraveled with a detailed density functional theory-based analyses.

Original language	English
Pages (from-to)	3624-3632
Number of pages	9
Journal	ACS Applied Energy Materials
Volume	2
Issue number	5
DOIs	https://doi.org/10.1021/acsaem.9b00364
State	Published - 28 May 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

Keywords

direct four-electron transfer, density functional theory,
oxygen reduction reaction
selenium doped graphene
single-atom site catalyst

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10.1021/acsaem.9b00364

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abstract = "A single-atom site catalyst for direct four electron oxygen reduction reaction (ORR) is identified where selenium (ultrasmall amount of Se, 1 at. %) is the active center that couples reduced graphene oxide (rGO) sheets. This metal-free catalyst is found to be undergoing ORR through the direct four-electron pathway in alkaline medium, similar to platinum, whereas rGO prefers a two-electron path, and the experimental observation is correlated with theoretical study. The role of Se-like elements in graphene, which have similar electronegativity as carbon, is unraveled with a detailed density functional theory-based analyses.",

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AU - Shyaga, Naresh

AU - Narayanan, Tharangattu N.

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Selenium-Coupled Reduced Graphene Oxide as Single-Atom Site Catalyst for Direct Four-Electron Oxygen Reduction Reaction

Abstract

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Keywords

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