H2 gas sensing of Co-incorporated metal-organic frameworks

Duy Khoi Nguyen; Jae Hyoung Lee; Tan Le Hoang Doan; Thanh Binh Nguyen; Sungkyun Park; Sang Sub Kim; Bach Thang Phan

doi:10.1016/j.apsusc.2020.146487

H₂ gas sensing of Co-incorporated metal-organic frameworks

Duy Khoi Nguyen, Jae Hyoung Lee, Tan Le Hoang Doan, Thanh Binh Nguyen, Sungkyun Park, Sang Sub Kim, Bach Thang Phan

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

33 Scopus citations

Abstract

Two Co-MOF-74 (Co-MOF-I and Co-MOF–II) were designed for the sensing of H₂ gas. Owing to the high density of Co ions (+2 and + 3 states) located in metal clusters in the p-type phase, Co-MOF-74 exhibited better selectivity in gaseous H₂ sensing, compared with those of Ni-MOF-74 and Mg-MOF-74. The Co-MOF-II sensor, with higher porosity and Co ion concentration than the Co-MOF-I sensor, had more adsorption sites; consequently, more target gas molecules were adsorbed, resulting in a stronger change in the underlying resistance and better sensing. The gas sensing performance, characterized in the present study, highlights the advantages of using Co-MOFs gas sensors, in terms of their safety, energy usage, and scope of applications.

Original language	English
Article number	146487
Journal	Applied Surface Science
Volume	523
DOIs	https://doi.org/10.1016/j.apsusc.2020.146487
State	Published - 1 Sep 2020

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

Co-MOF
Gas sensor
H gas
Selectivity
Sensing mechanism

Access to Document

10.1016/j.apsusc.2020.146487

Cite this

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title = "H2 gas sensing of Co-incorporated metal-organic frameworks",

abstract = "Two Co-MOF-74 (Co-MOF-I and Co-MOF–II) were designed for the sensing of H2 gas. Owing to the high density of Co ions (+2 and + 3 states) located in metal clusters in the p-type phase, Co-MOF-74 exhibited better selectivity in gaseous H2 sensing, compared with those of Ni-MOF-74 and Mg-MOF-74. The Co-MOF-II sensor, with higher porosity and Co ion concentration than the Co-MOF-I sensor, had more adsorption sites; consequently, more target gas molecules were adsorbed, resulting in a stronger change in the underlying resistance and better sensing. The gas sensing performance, characterized in the present study, highlights the advantages of using Co-MOFs gas sensors, in terms of their safety, energy usage, and scope of applications.",

keywords = "Co-MOF, Gas sensor, H gas, Selectivity, Sensing mechanism",

author = "Nguyen, {Duy Khoi} and Lee, {Jae Hyoung} and Doan, {Tan Le Hoang} and Nguyen, {Thanh Binh} and Sungkyun Park and Kim, {Sang Sub} and Phan, {Bach Thang}",

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AU - Nguyen, Duy Khoi

AU - Lee, Jae Hyoung

AU - Doan, Tan Le Hoang

AU - Nguyen, Thanh Binh

AU - Park, Sungkyun

AU - Kim, Sang Sub

AU - Phan, Bach Thang

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Two Co-MOF-74 (Co-MOF-I and Co-MOF–II) were designed for the sensing of H2 gas. Owing to the high density of Co ions (+2 and + 3 states) located in metal clusters in the p-type phase, Co-MOF-74 exhibited better selectivity in gaseous H2 sensing, compared with those of Ni-MOF-74 and Mg-MOF-74. The Co-MOF-II sensor, with higher porosity and Co ion concentration than the Co-MOF-I sensor, had more adsorption sites; consequently, more target gas molecules were adsorbed, resulting in a stronger change in the underlying resistance and better sensing. The gas sensing performance, characterized in the present study, highlights the advantages of using Co-MOFs gas sensors, in terms of their safety, energy usage, and scope of applications.

AB - Two Co-MOF-74 (Co-MOF-I and Co-MOF–II) were designed for the sensing of H2 gas. Owing to the high density of Co ions (+2 and + 3 states) located in metal clusters in the p-type phase, Co-MOF-74 exhibited better selectivity in gaseous H2 sensing, compared with those of Ni-MOF-74 and Mg-MOF-74. The Co-MOF-II sensor, with higher porosity and Co ion concentration than the Co-MOF-I sensor, had more adsorption sites; consequently, more target gas molecules were adsorbed, resulting in a stronger change in the underlying resistance and better sensing. The gas sensing performance, characterized in the present study, highlights the advantages of using Co-MOFs gas sensors, in terms of their safety, energy usage, and scope of applications.

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KW - Selectivity

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