Effect of core and surface area toward hydrogen gas sensing performance using Pd@ZnO core-shell nanoparticles

Thuy T.D. Nguyen; Dung Van Dao; Dong Seog Kim; Hu Jun Lee; Sang Yeob Oh; In Hwan Lee; Yeon Tae Yu

doi:10.1016/j.jcis.2020.12.017

Effect of core and surface area toward hydrogen gas sensing performance using Pd@ZnO core-shell nanoparticles

Thuy T.D. Nguyen, Dung Van Dao, Dong Seog Kim, Hu Jun Lee, Sang Yeob Oh, In Hwan Lee, Yeon Tae Yu

Department of Materials Science and Engineering

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

42 Citations (Scopus)

Abstract

A versatile hydrogen gas sensor is fabricated using Pd@ZnO core-shell nanoparticles (CSNPs), which were synthesized through a hydrothermal route. Effect of oxidation behavior of Pd core to hydrogen sensing is also investigated for Pd@ZnO CSNPs. Accordingly, Pd@ZnO-2 sensor (core-shell sample was calcined in argon) demonstrates the best performance with respect to Pd@ZnO-1 (core-shell sample was calcined in air) and pure ZnO. It shows a much higher response (R = R_a/R_g = 22) than those of Pd@ZnO-1 (12) and pure ZnO (7) sensors with faster response and recovery times (1.4 and 7.8 min) to 100 ppm hydrogen at 350 °C. In addition, Pd@ZnO-2 sensor owns high selectivity to hydrogen among interfering target gases. Improvement can be attributed to the high content of metallic Pd⁰ species in CSNPs as calcined in argon. Thereby, a higher Pd metallic content (77%) still remains in Pd@ZnO-2 compared to Pd@ZnO-1 (56%), which in turn modulates the resistance of sensors as exposed to air and target gas, thus enhancing gas sensing activity. High BET surface area of core-shell materials provides plenty of active sites for accelerating the sensing reactions as well.

Original language	English
Pages (from-to)	252-259
Number of pages	8
Journal	Journal of Colloid and Interface Science
Volume	587
DOIs	https://doi.org/10.1016/j.jcis.2020.12.017
Publication status	Published - 2021 Apr

Bibliographical note

Funding Information:
This work was supported by 1) the BK21-FOUR program of the Ministry of Education and Human-Resource Development, South of Korea; 2) a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1A2B4014090, 2020R1A2B5B03001603); and 3) Research Base Construction Fund Support Program by Jeonbuk National University in 2018.

Publisher Copyright:
© 2020 Elsevier Inc.

Keywords

Core-shell
Hydrogen sensing
Palladium
Surface area
Zinc oxide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

Access to Document

10.1016/j.jcis.2020.12.017

Cite this

@article{2e677d739e834154af2aded57bb4e425,

title = "Effect of core and surface area toward hydrogen gas sensing performance using Pd@ZnO core-shell nanoparticles",

abstract = "A versatile hydrogen gas sensor is fabricated using Pd@ZnO core-shell nanoparticles (CSNPs), which were synthesized through a hydrothermal route. Effect of oxidation behavior of Pd core to hydrogen sensing is also investigated for Pd@ZnO CSNPs. Accordingly, Pd@ZnO-2 sensor (core-shell sample was calcined in argon) demonstrates the best performance with respect to Pd@ZnO-1 (core-shell sample was calcined in air) and pure ZnO. It shows a much higher response (R = Ra/Rg = 22) than those of Pd@ZnO-1 (12) and pure ZnO (7) sensors with faster response and recovery times (1.4 and 7.8 min) to 100 ppm hydrogen at 350 °C. In addition, Pd@ZnO-2 sensor owns high selectivity to hydrogen among interfering target gases. Improvement can be attributed to the high content of metallic Pd0 species in CSNPs as calcined in argon. Thereby, a higher Pd metallic content (77%) still remains in Pd@ZnO-2 compared to Pd@ZnO-1 (56%), which in turn modulates the resistance of sensors as exposed to air and target gas, thus enhancing gas sensing activity. High BET surface area of core-shell materials provides plenty of active sites for accelerating the sensing reactions as well.",

keywords = "Core-shell, Hydrogen sensing, Palladium, Surface area, Zinc oxide",

author = "Nguyen, {Thuy T.D.} and Dao, {Dung Van} and Kim, {Dong Seog} and Lee, {Hu Jun} and Oh, {Sang Yeob} and Lee, {In Hwan} and Yu, {Yeon Tae}",

note = "Funding Information: This work was supported by 1) the BK21-FOUR program of the Ministry of Education and Human-Resource Development, South of Korea; 2) a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1A2B4014090, 2020R1A2B5B03001603); and 3) Research Base Construction Fund Support Program by Jeonbuk National University in 2018. Publisher Copyright: {\textcopyright} 2020 Elsevier Inc.",

year = "2021",

month = apr,

doi = "10.1016/j.jcis.2020.12.017",

language = "English",

volume = "587",

pages = "252--259",

journal = "Journal of Colloid and Interface Science",

issn = "0021-9797",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Effect of core and surface area toward hydrogen gas sensing performance using Pd@ZnO core-shell nanoparticles

AU - Nguyen, Thuy T.D.

AU - Dao, Dung Van

AU - Kim, Dong Seog

AU - Lee, Hu Jun

AU - Oh, Sang Yeob

AU - Lee, In Hwan

AU - Yu, Yeon Tae

N1 - Funding Information: This work was supported by 1) the BK21-FOUR program of the Ministry of Education and Human-Resource Development, South of Korea; 2) a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (2016R1A2B4014090, 2020R1A2B5B03001603); and 3) Research Base Construction Fund Support Program by Jeonbuk National University in 2018. Publisher Copyright: © 2020 Elsevier Inc.

PY - 2021/4

Y1 - 2021/4

N2 - A versatile hydrogen gas sensor is fabricated using Pd@ZnO core-shell nanoparticles (CSNPs), which were synthesized through a hydrothermal route. Effect of oxidation behavior of Pd core to hydrogen sensing is also investigated for Pd@ZnO CSNPs. Accordingly, Pd@ZnO-2 sensor (core-shell sample was calcined in argon) demonstrates the best performance with respect to Pd@ZnO-1 (core-shell sample was calcined in air) and pure ZnO. It shows a much higher response (R = Ra/Rg = 22) than those of Pd@ZnO-1 (12) and pure ZnO (7) sensors with faster response and recovery times (1.4 and 7.8 min) to 100 ppm hydrogen at 350 °C. In addition, Pd@ZnO-2 sensor owns high selectivity to hydrogen among interfering target gases. Improvement can be attributed to the high content of metallic Pd0 species in CSNPs as calcined in argon. Thereby, a higher Pd metallic content (77%) still remains in Pd@ZnO-2 compared to Pd@ZnO-1 (56%), which in turn modulates the resistance of sensors as exposed to air and target gas, thus enhancing gas sensing activity. High BET surface area of core-shell materials provides plenty of active sites for accelerating the sensing reactions as well.

AB - A versatile hydrogen gas sensor is fabricated using Pd@ZnO core-shell nanoparticles (CSNPs), which were synthesized through a hydrothermal route. Effect of oxidation behavior of Pd core to hydrogen sensing is also investigated for Pd@ZnO CSNPs. Accordingly, Pd@ZnO-2 sensor (core-shell sample was calcined in argon) demonstrates the best performance with respect to Pd@ZnO-1 (core-shell sample was calcined in air) and pure ZnO. It shows a much higher response (R = Ra/Rg = 22) than those of Pd@ZnO-1 (12) and pure ZnO (7) sensors with faster response and recovery times (1.4 and 7.8 min) to 100 ppm hydrogen at 350 °C. In addition, Pd@ZnO-2 sensor owns high selectivity to hydrogen among interfering target gases. Improvement can be attributed to the high content of metallic Pd0 species in CSNPs as calcined in argon. Thereby, a higher Pd metallic content (77%) still remains in Pd@ZnO-2 compared to Pd@ZnO-1 (56%), which in turn modulates the resistance of sensors as exposed to air and target gas, thus enhancing gas sensing activity. High BET surface area of core-shell materials provides plenty of active sites for accelerating the sensing reactions as well.

KW - Core-shell

KW - Hydrogen sensing

KW - Palladium

KW - Surface area

KW - Zinc oxide

UR - http://www.scopus.com/inward/record.url?scp=85098888024&partnerID=8YFLogxK

U2 - 10.1016/j.jcis.2020.12.017

DO - 10.1016/j.jcis.2020.12.017

M3 - Article

C2 - 33360898

AN - SCOPUS:85098888024

SN - 0021-9797

VL - 587

SP - 252

EP - 259

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

Effect of core and surface area toward hydrogen gas sensing performance using Pd@ZnO core-shell nanoparticles

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this