Synthesis of Bimetallic Conductive 2D Metal–Organic Framework (Co x Ni y -CAT) and Its Mass Production

Enhanced Electrochemical Oxygen Reduction Activity

Hajin Yoon, Sujeong Lee, Sojin Oh, Heejun Park, Sora Choi, Moonhyun Oh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The development of new electrocatalysts for electrochemical oxygen reduction to replace expensive and rare platinum-based catalysts is an important issue in energy storage and conversion research. In this context, conductive and porous metal–organic frameworks (MOFs) are considered promising materials for the oxygen reduction reaction (ORR) due to not only their high surface area and well-developed pores but also versatile structural features and chemical compositions. Herein, the preparation of bimetallic conductive 2D MOFs (Co x Ni y -CATs) are reported for use as catalysts in the ORR. The ratio of the two metal ions (Co 2+ and Ni 2+ ) in the bimetallic Co x Ni y -CATs is rationally controlled to determine the optimal composition of Co x Ni y -CAT for efficient performance in the ORR. Indeed, bimetallic MOFs display enhanced ORR activity compared to their monometallic counterparts (Co-CAT or Ni-CAT). During the ORR, bimetallic Co x Ni y -CATs retain an advantageous characteristic of Co-CAT in relation to its high diffusion-limiting current density, as well as a key advantage of Ni-CAT in relation to its high onset potential. Moreover, the ORR-active bimetallic Co x Ni y -CAT with excellent ORR activity is prepared at a large scale via a convenient method using a ball-mill reactor.

Original languageEnglish
Article number1805232
JournalSmall
Volume15
Issue number17
DOIs
Publication statusPublished - 2019 Apr 26

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Oxygen
Catalysts
Ball mills
Electrocatalysts
Platinum
Chemical analysis
Energy conversion
Energy storage
Metal ions
Current density
Thermodynamic properties
Metals
Display devices
Ions
Research

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

Cite this

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title = "Synthesis of Bimetallic Conductive 2D Metal–Organic Framework (Co x Ni y -CAT) and Its Mass Production: Enhanced Electrochemical Oxygen Reduction Activity",
abstract = "The development of new electrocatalysts for electrochemical oxygen reduction to replace expensive and rare platinum-based catalysts is an important issue in energy storage and conversion research. In this context, conductive and porous metal–organic frameworks (MOFs) are considered promising materials for the oxygen reduction reaction (ORR) due to not only their high surface area and well-developed pores but also versatile structural features and chemical compositions. Herein, the preparation of bimetallic conductive 2D MOFs (Co x Ni y -CATs) are reported for use as catalysts in the ORR. The ratio of the two metal ions (Co 2+ and Ni 2+ ) in the bimetallic Co x Ni y -CATs is rationally controlled to determine the optimal composition of Co x Ni y -CAT for efficient performance in the ORR. Indeed, bimetallic MOFs display enhanced ORR activity compared to their monometallic counterparts (Co-CAT or Ni-CAT). During the ORR, bimetallic Co x Ni y -CATs retain an advantageous characteristic of Co-CAT in relation to its high diffusion-limiting current density, as well as a key advantage of Ni-CAT in relation to its high onset potential. Moreover, the ORR-active bimetallic Co x Ni y -CAT with excellent ORR activity is prepared at a large scale via a convenient method using a ball-mill reactor.",
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Synthesis of Bimetallic Conductive 2D Metal–Organic Framework (Co x Ni y -CAT) and Its Mass Production : Enhanced Electrochemical Oxygen Reduction Activity. / Yoon, Hajin; Lee, Sujeong; Oh, Sojin; Park, Heejun; Choi, Sora; Oh, Moonhyun.

In: Small, Vol. 15, No. 17, 1805232, 26.04.2019.

Research output: Contribution to journalArticle

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AU - Choi, Sora

AU - Oh, Moonhyun

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