Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water
This study aimed to synthesize and characterize cobalt sulfide deposited on FTO by hydrothermal method and investigate its photoelectrochemical (PEC) water splitting performance. Cobalt sulfide thin films were produced by annealing at two different temperatures, namely, 400 and 500 °C. X-ray diffr...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2020
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| Online Access: | http://journalarticle.ukm.my/16177/ http://journalarticle.ukm.my/16177/1/24.pdf |
| _version_ | 1848813985989656576 |
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| author | Rambey, Mustafid Amna Khuzaimah Arifin, Lorna Jeffery Minggu, Mohammad Kassim, |
| author_facet | Rambey, Mustafid Amna Khuzaimah Arifin, Lorna Jeffery Minggu, Mohammad Kassim, |
| author_sort | Rambey, Mustafid Amna |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | This study aimed to synthesize and characterize cobalt sulfide deposited on FTO by hydrothermal method and
investigate its photoelectrochemical (PEC) water splitting performance. Cobalt sulfide thin films were produced by
annealing at two different temperatures, namely, 400 and 500 °C. X-ray diffraction (XRD) and Fourier transform Raman
spectroscopy were used to characterize the phase structure. Scanning electron microscopy was used to observe the
morphology. Ultraviolet-visible spectroscopy and linear sweep voltammetry analyses were used to determine the thinfilm band gap and evaluate the PEC water splitting performance, respectively. From the XRD and Raman analyses,
all the samples produced consisted of mixed phases of Co3
S4
and Co9
S8
. However, each sample contained different
percentage phases. The sample annealed at 400 °C contained more Co9
S8
, whereas that annealed at 500 °C contained
comparable amounts of Co3
S4
and Co9
S8
. The morphologies of pre-annealed samples showed vertical flakes with
diameters around 200-250 nm and flake thickness around 25-50 nm. When the temperature was increased from preannealing temperature to 400 and 500 °C, several flakes were destructed and formed spherical-like clusters. The Tauc
plot from absorption analysis showed that the samples annealed at 400 and 500 °C produced similar band gaps at ~2.0
eV. The PEC performance analysis results show that annealing at 400 °C produced the highest photocurrent density of
10 µA/cm2
at a potential of -0.7 V. |
| first_indexed | 2025-11-15T00:26:54Z |
| format | Article |
| id | oai:generic.eprints.org:16177 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T00:26:54Z |
| publishDate | 2020 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:161772021-02-13T13:39:36Z http://journalarticle.ukm.my/16177/ Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water Rambey, Mustafid Amna Khuzaimah Arifin, Lorna Jeffery Minggu, Mohammad Kassim, This study aimed to synthesize and characterize cobalt sulfide deposited on FTO by hydrothermal method and investigate its photoelectrochemical (PEC) water splitting performance. Cobalt sulfide thin films were produced by annealing at two different temperatures, namely, 400 and 500 °C. X-ray diffraction (XRD) and Fourier transform Raman spectroscopy were used to characterize the phase structure. Scanning electron microscopy was used to observe the morphology. Ultraviolet-visible spectroscopy and linear sweep voltammetry analyses were used to determine the thinfilm band gap and evaluate the PEC water splitting performance, respectively. From the XRD and Raman analyses, all the samples produced consisted of mixed phases of Co3 S4 and Co9 S8 . However, each sample contained different percentage phases. The sample annealed at 400 °C contained more Co9 S8 , whereas that annealed at 500 °C contained comparable amounts of Co3 S4 and Co9 S8 . The morphologies of pre-annealed samples showed vertical flakes with diameters around 200-250 nm and flake thickness around 25-50 nm. When the temperature was increased from preannealing temperature to 400 and 500 °C, several flakes were destructed and formed spherical-like clusters. The Tauc plot from absorption analysis showed that the samples annealed at 400 and 500 °C produced similar band gaps at ~2.0 eV. The PEC performance analysis results show that annealing at 400 °C produced the highest photocurrent density of 10 µA/cm2 at a potential of -0.7 V. Penerbit Universiti Kebangsaan Malaysia 2020-12 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/16177/1/24.pdf Rambey, Mustafid Amna and Khuzaimah Arifin, and Lorna Jeffery Minggu, and Mohammad Kassim, (2020) Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water. Sains Malaysiana, 49 (12). pp. 3117-3123. ISSN 0126-6039 https://www.ukm.my/jsm/malay_journals/jilid49bil12_2020/KandunganJilid49Bil12_2020.html |
| spellingShingle | Rambey, Mustafid Amna Khuzaimah Arifin, Lorna Jeffery Minggu, Mohammad Kassim, Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water |
| title | Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water |
| title_full | Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water |
| title_fullStr | Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water |
| title_full_unstemmed | Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water |
| title_short | Cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water |
| title_sort | cobalt sulfide as photoelectrode of photoelectrochemical hydrogen generation from water |
| url | http://journalarticle.ukm.my/16177/ http://journalarticle.ukm.my/16177/ http://journalarticle.ukm.my/16177/1/24.pdf |