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Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures

The current increase in demand for graphene in various energy applications such as electrode materials for supercapacitors, batteries, thermoelectric, and hydrogen production via water-splitting, the production of high-quality graphene, considering its fascinating physical and electrical properties,...

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Main Authors: Anuar, Nur Afira, Nor, Nurul Hidayah Mohamad, Chia, Mei Yuen, Goh, Boon Tong, Chiu, Wee Siong, Aspanut, Zarina, Awang, Rozidawati, Nakajima, Hideki, Tunmee, Sarayut, Sookhakian, Mehran, Alias, Yatimah
Format: Article
Published: Elsevier 2024
Subjects:
QC Physics
QD Chemistry
Online Access:http://eprints.um.edu.my/45209/
https://doi.org/10.1016/j.tsf.2024.140330
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spelling my.um.eprints.452092024-09-26T03:12:38Z http://eprints.um.edu.my/45209/ Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures Anuar, Nur Afira Nor, Nurul Hidayah Mohamad Chia, Mei Yuen Goh, Boon Tong Chiu, Wee Siong Aspanut, Zarina Awang, Rozidawati Nakajima, Hideki Tunmee, Sarayut Sookhakian, Mehran Alias, Yatimah QC Physics QD Chemistry The current increase in demand for graphene in various energy applications such as electrode materials for supercapacitors, batteries, thermoelectric, and hydrogen production via water-splitting, the production of high-quality graphene, considering its fascinating physical and electrical properties, high-yield, and large-area has becoming more challenging at the research and development level. Therefore, in this work, graphene nanoplatelets (GNPs) were directly grown on tungsten nanoparticle (W NP)-coated p-type crystalline silicon and quartz substrates using hot-wire chemical vapor deposition at low substrate temperatures (<500 degrees C). Prior to the GNP deposition, a plasma process was employed to induce the formation of W NPs, which act as a metal catalyst for facilitating the growth of large-area and multi-layer GNPs. The W NPs were formed at substrate temperatures ranging from 250 to 550 degrees C, with the largest graphene sheet was grown at 450 degrees C. Higher substrate temperatures promote the growth of high-quality graphene layers with high intensities of G (I-G) and 2D bands (I-2D), and high I-2D/I-G ratio values. The GNP photoelectrode prepared at 450 degrees C demonstrated better photoelectrochemical responses with the highest photocurrent density of 1.65 mA/cm(2) at 1.5 V-Ag/AgCl, the lowest charge transfer resistance (14.0 k Omega), and the highest donor density (2.57 x 10 (28) cm(-3)) compared to the tungsten carbide thin film and W NP electrodes prepared at the same temperature. The effects of substrate temperature on the optical, structural, and photoelectrochemical properties of the as-grown GNPs are discussed. Elsevier 2024-05 Article PeerReviewed Anuar, Nur Afira and Nor, Nurul Hidayah Mohamad and Chia, Mei Yuen and Goh, Boon Tong and Chiu, Wee Siong and Aspanut, Zarina and Awang, Rozidawati and Nakajima, Hideki and Tunmee, Sarayut and Sookhakian, Mehran and Alias, Yatimah (2024) Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures. Thin Solid Films, 797. p. 140330. ISSN 0040-6090, DOI https://doi.org/10.1016/j.tsf.2024.140330 <https://doi.org/10.1016/j.tsf.2024.140330>. https://doi.org/10.1016/j.tsf.2024.140330 10.1016/j.tsf.2024.140330
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QC Physics
QD Chemistry
spellingShingle QC Physics
QD Chemistry
Anuar, Nur Afira
Nor, Nurul Hidayah Mohamad
Chia, Mei Yuen
Goh, Boon Tong
Chiu, Wee Siong
Aspanut, Zarina
Awang, Rozidawati
Nakajima, Hideki
Tunmee, Sarayut
Sookhakian, Mehran
Alias, Yatimah
Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures
description The current increase in demand for graphene in various energy applications such as electrode materials for supercapacitors, batteries, thermoelectric, and hydrogen production via water-splitting, the production of high-quality graphene, considering its fascinating physical and electrical properties, high-yield, and large-area has becoming more challenging at the research and development level. Therefore, in this work, graphene nanoplatelets (GNPs) were directly grown on tungsten nanoparticle (W NP)-coated p-type crystalline silicon and quartz substrates using hot-wire chemical vapor deposition at low substrate temperatures (<500 degrees C). Prior to the GNP deposition, a plasma process was employed to induce the formation of W NPs, which act as a metal catalyst for facilitating the growth of large-area and multi-layer GNPs. The W NPs were formed at substrate temperatures ranging from 250 to 550 degrees C, with the largest graphene sheet was grown at 450 degrees C. Higher substrate temperatures promote the growth of high-quality graphene layers with high intensities of G (I-G) and 2D bands (I-2D), and high I-2D/I-G ratio values. The GNP photoelectrode prepared at 450 degrees C demonstrated better photoelectrochemical responses with the highest photocurrent density of 1.65 mA/cm(2) at 1.5 V-Ag/AgCl, the lowest charge transfer resistance (14.0 k Omega), and the highest donor density (2.57 x 10 (28) cm(-3)) compared to the tungsten carbide thin film and W NP electrodes prepared at the same temperature. The effects of substrate temperature on the optical, structural, and photoelectrochemical properties of the as-grown GNPs are discussed.
format Article
author Anuar, Nur Afira
Nor, Nurul Hidayah Mohamad
Chia, Mei Yuen
Goh, Boon Tong
Chiu, Wee Siong
Aspanut, Zarina
Awang, Rozidawati
Nakajima, Hideki
Tunmee, Sarayut
Sookhakian, Mehran
Alias, Yatimah
author_facet Anuar, Nur Afira
Nor, Nurul Hidayah Mohamad
Chia, Mei Yuen
Goh, Boon Tong
Chiu, Wee Siong
Aspanut, Zarina
Awang, Rozidawati
Nakajima, Hideki
Tunmee, Sarayut
Sookhakian, Mehran
Alias, Yatimah
author_sort Anuar, Nur Afira
title Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures
title_short Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures
title_full Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures
title_fullStr Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures
title_full_unstemmed Improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures
title_sort improved photoelectrochemical performance of tungsten-catalyzed graphene nanoplatelet electrodes prepared by hot-wire chemical vapor deposition at low substrate temperatures
publisher Elsevier
publishDate 2024
url http://eprints.um.edu.my/45209/
https://doi.org/10.1016/j.tsf.2024.140330
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score 13.211869

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