Single-Atomic Mn-N-C Catalyst with Hierarchical Pores for Anion Exchange Membrane Fuel Cells: A Mn Confinement Strategy

Kyungmin Im; Jue Hyuk Jang; Toan Minh Pham; Jeong Hee Lee; Young Moo Lee; Jinsoo Kim; Sung Jong Yoo

doi:10.1021/acsaem.4c01071

Single-Atomic Mn-N-C Catalyst with Hierarchical Pores for Anion Exchange Membrane Fuel Cells: A Mn Confinement Strategy

Kyungmin Im, Jue Hyuk Jang, Toan Minh Pham, Jeong Hee Lee, Young Moo Lee, Jinsoo Kim, Sung Jong Yoo

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

2 Citations (Scopus)

Abstract

Metal- and nitrogen-doped carbon (M-N-C) catalysts are effective alternatives to oxygen reduction reaction (ORR) catalysts, such as platinum-based systems, in fuel cell technology. Among various transition metals, Mn is an abundant metal; in biological systems, enzymes including Mn effectively catalyze oxygen-evolving reactions at low potentials. Herein, a hollow and single-atom Mn-N-C catalyst was synthesized by using a pseudomorphic replication strategy. This approach is an efficient way to synthesize single-atom Mn catalysts without segregating Mn species. The prepared Mn-N-C hollow spheres exhibited high ORR activity with a half-wave potential of 0.877 V and an onset potential of 1.01 V vs reversible hydrogen electrode. When applied as a cathode in an anion exchange membrane fuel cell, Mn-N-C hollow spheres exhibited a maximum power density of 617 mW/cm² and a current density of 785 mA/cm² at 0.6 V.

Original language	English
Pages (from-to)	9706-9714
Number of pages	9
Journal	ACS Applied Energy Materials
Volume	7
Issue number	21
DOIs	https://doi.org/10.1021/acsaem.4c01071
Publication status	Published - 11 Nov 2024

Bibliographical note

Publisher Copyright:
© 2024 American Chemical Society.

Keywords

Anion exchange membrane fuel cells
Hierarchical pore structure
Manganese
Single-atomic catalyst
Spray pyrolysis
Zinc oxide

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10.1021/acsaem.4c01071

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@article{7640fc3dfcde49fea1781ed3f388f3e2,

title = "Single-Atomic Mn-N-C Catalyst with Hierarchical Pores for Anion Exchange Membrane Fuel Cells: A Mn Confinement Strategy",

abstract = "Metal- and nitrogen-doped carbon (M-N-C) catalysts are effective alternatives to oxygen reduction reaction (ORR) catalysts, such as platinum-based systems, in fuel cell technology. Among various transition metals, Mn is an abundant metal; in biological systems, enzymes including Mn effectively catalyze oxygen-evolving reactions at low potentials. Herein, a hollow and single-atom Mn-N-C catalyst was synthesized by using a pseudomorphic replication strategy. This approach is an efficient way to synthesize single-atom Mn catalysts without segregating Mn species. The prepared Mn-N-C hollow spheres exhibited high ORR activity with a half-wave potential of 0.877 V and an onset potential of 1.01 V vs reversible hydrogen electrode. When applied as a cathode in an anion exchange membrane fuel cell, Mn-N-C hollow spheres exhibited a maximum power density of 617 mW/cm2 and a current density of 785 mA/cm2 at 0.6 V.",

keywords = "Anion exchange membrane fuel cells, Hierarchical pore structure, Manganese, Single-atomic catalyst, Spray pyrolysis, Zinc oxide",

author = "Kyungmin Im and Jang, {Jue Hyuk} and Pham, {Toan Minh} and Lee, {Jeong Hee} and Lee, {Young Moo} and Jinsoo Kim and Yoo, {Sung Jong}",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2024",

month = nov,

day = "11",

doi = "10.1021/acsaem.4c01071",

language = "English",

volume = "7",

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T1 - Single-Atomic Mn-N-C Catalyst with Hierarchical Pores for Anion Exchange Membrane Fuel Cells

T2 - A Mn Confinement Strategy

AU - Im, Kyungmin

AU - Jang, Jue Hyuk

AU - Pham, Toan Minh

AU - Lee, Jeong Hee

AU - Lee, Young Moo

AU - Kim, Jinsoo

AU - Yoo, Sung Jong

PY - 2024/11/11

Y1 - 2024/11/11

N2 - Metal- and nitrogen-doped carbon (M-N-C) catalysts are effective alternatives to oxygen reduction reaction (ORR) catalysts, such as platinum-based systems, in fuel cell technology. Among various transition metals, Mn is an abundant metal; in biological systems, enzymes including Mn effectively catalyze oxygen-evolving reactions at low potentials. Herein, a hollow and single-atom Mn-N-C catalyst was synthesized by using a pseudomorphic replication strategy. This approach is an efficient way to synthesize single-atom Mn catalysts without segregating Mn species. The prepared Mn-N-C hollow spheres exhibited high ORR activity with a half-wave potential of 0.877 V and an onset potential of 1.01 V vs reversible hydrogen electrode. When applied as a cathode in an anion exchange membrane fuel cell, Mn-N-C hollow spheres exhibited a maximum power density of 617 mW/cm2 and a current density of 785 mA/cm2 at 0.6 V.

AB - Metal- and nitrogen-doped carbon (M-N-C) catalysts are effective alternatives to oxygen reduction reaction (ORR) catalysts, such as platinum-based systems, in fuel cell technology. Among various transition metals, Mn is an abundant metal; in biological systems, enzymes including Mn effectively catalyze oxygen-evolving reactions at low potentials. Herein, a hollow and single-atom Mn-N-C catalyst was synthesized by using a pseudomorphic replication strategy. This approach is an efficient way to synthesize single-atom Mn catalysts without segregating Mn species. The prepared Mn-N-C hollow spheres exhibited high ORR activity with a half-wave potential of 0.877 V and an onset potential of 1.01 V vs reversible hydrogen electrode. When applied as a cathode in an anion exchange membrane fuel cell, Mn-N-C hollow spheres exhibited a maximum power density of 617 mW/cm2 and a current density of 785 mA/cm2 at 0.6 V.

KW - Anion exchange membrane fuel cells

KW - Hierarchical pore structure

KW - Manganese

KW - Single-atomic catalyst

KW - Spray pyrolysis

KW - Zinc oxide

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DO - 10.1021/acsaem.4c01071

M3 - Article

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SN - 2574-0962

VL - 7

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JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

IS - 21

ER -

Single-Atomic Mn-N-C Catalyst with Hierarchical Pores for Anion Exchange Membrane Fuel Cells: A Mn Confinement Strategy

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Studies from Kyung Hee University Describe New Findings in Energy Materials (Single-atomic Mn-n-c Catalyst With Hierarchical Pores for Anion Exchange Membrane Fuel Cells: a Mn Confinement Strategy)

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Single-Atomic Mn-N-C Catalyst with Hierarchical Pores for Anion Exchange Membrane Fuel Cells: A Mn Confinement Strategy

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Bibliographical note

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Studies from Kyung Hee University Describe New Findings in Energy Materials (Single-atomic Mn-n-c Catalyst With Hierarchical Pores for Anion Exchange Membrane Fuel Cells: a Mn Confinement Strategy)

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