Effect of Ascorbic Acid Concentration on Cu2O Production for Photoelectrochemical Water Splitting on Photocathode Thin Films

Kharisma Luthfiaratri Rahayu; Abdul Haris; Gunawan Gunawan

doi:10.14710/jksa.25.12.442-449

DOI: https://doi.org/10.14710/jksa.25.12.442-449

Effect of Ascorbic Acid Concentration on Cu2O Production for Photoelectrochemical Water Splitting on Photocathode Thin Films

Kharisma Luthfiaratri Rahayu, Abdul Haris

, Gunawan Gunawan

Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University, Jl. Prof. Soedarto, SH., Tembalang, Semarang 50271, Indonesia

Received: 29 Aug 2022; Revised: 18 Nov 2022; Accepted: 21 Dec 2022; Published: 31 Dec 2022.

BibTex Citation Data :

@article{JKSA53020,
    author = {Kharisma Luthfiaratri Rahayu and Abdul Haris and Gunawan Gunawan},
    title = {Effect of Ascorbic Acid Concentration on Cu2O Production for Photoelectrochemical Water Splitting on Photocathode Thin Films},
    journal = {Jurnal Kimia Sains dan Aplikasi},
  volume = {25},
    number = {12},
    year = {2022},
    keywords = {Cu2O; ascorbic acid; photocathode; water splitting},
    abstract = {Hydrogen energy has great potential as a renewable energy source. Electrochemical water-splitting can be employed to obtain hydrogen by converting solar energy into hydrogen. In this study, Cu 2 O thin film electrodes have been successfully synthesized using ascorbic acid using the spin coating method. This study aimed to determine the effect of ascorbic acid in manufacturing Cu 2 O semiconductors as photocathodes and their activity for electrochemical water-splitting. The results indicated that ascorbate affected the photon current and onset potential of the Cu 2 O semiconductor. The synthesis results found that Cu 2 O at C1 (lower concentration than Cu 2+ ) yielded 95.69%, and the yield for Cu 2 O at C2 (concentration equal to Cu 2+ ) was 96.2%. The yield for Cu 2 O at C3 (concentration greater than Cu 2+ ) was 99.82%. The photon currents generated by adding 3%, 6%, and 9% ascorbate solution were 1.18, 1.69, and 1.78 mA/cm 2 , respectively, at 0.3 V vs. RHE (Reversible Hydrogen Electrode). X-ray diffraction analysis revealed that the sample consisted of Cu 2 O C3 with an average grain size of 17.55 nm. Meanwhile, Cu 2 O C1 and Cu 2 O C2 had average grain sizes of 38.99 nm and 36.42 nm, respectively. SEM analysis showed the presence of Cu 2 O with a cuboid and flower-like morphology. EDX analysis showed that the samples contained elements of Cu: O, 73.97%: 26.03%; 79.89%: 20.11% and 98.43%: 1.57% respectively.},
   issn = {2597-9914},   pages = {442--449}  doi = {10.14710/jksa.25.12.442-449},
    url = {https://ejournal.undip.ac.id/index.php/ksa/article/view/53020}
}

Citation Format:

Abstract

Hydrogen energy has great potential as a renewable energy source. Electrochemical water-splitting can be employed to obtain hydrogen by converting solar energy into hydrogen. In this study, Cu₂O thin film electrodes have been successfully synthesized using ascorbic acid using the spin coating method. This study aimed to determine the effect of ascorbic acid in manufacturing Cu₂O semiconductors as photocathodes and their activity for electrochemical water-splitting. The results indicated that ascorbate affected the photon current and onset potential of the Cu₂O semiconductor. The synthesis results found that Cu₂O at C1 (lower concentration than Cu²⁺) yielded 95.69%, and the yield for Cu₂O at C2 (concentration equal to Cu²⁺) was 96.2%. The yield for Cu₂O at C3 (concentration greater than Cu²⁺) was 99.82%. The photon currents generated by adding 3%, 6%, and 9% ascorbate solution were 1.18, 1.69, and 1.78 mA/cm², respectively, at 0.3 V vs. RHE (Reversible Hydrogen Electrode). X-ray diffraction analysis revealed that the sample consisted of Cu₂O C3 with an average grain size of 17.55 nm. Meanwhile, Cu₂O C1 and Cu₂O C2 had average grain sizes of 38.99 nm and 36.42 nm, respectively. SEM analysis showed the presence of Cu₂O with a cuboid and flower-like morphology. EDX analysis showed that the samples contained elements of Cu: O, 73.97%: 26.03%; 79.89%: 20.11% and 98.43%: 1.57% respectively.

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Keywords: Cu2O; ascorbic acid; photocathode; water splitting

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Section: Research Articles

Language : EN

In Vol 25, No 12 (2022): Volume 25 Issue 12 Year 2022

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Last update: 2026-09-04 10:29:56

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