Photoelectrochemical Synthesis of Hydrogen Peroxide from Saline Water via the Two-Electron Water Oxidation Reaction

Wenlong Guo; Meng Li; Shanshan Wang; Yu He; Yun Zhou; Xin Lian

doi:10.1021/acs.langmuir.4c02510

Photoelectrochemical Synthesis of Hydrogen Peroxide from Saline Water via the Two-Electron Water Oxidation Reaction

Wenlong Guo, Meng Li, Shanshan Wang, Yu He, Yun Zhou^*, Xin Lian^*

^*Corresponding author for this work

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

Abstract

Hydrogen peroxide (H₂O₂) production on the anode is more valuable than oxygen and chlorine evolution for photoelectrochemical saline water splitting. In this work, by the introduction of bicarbonate (HCO₃^-), H₂O₂ is produced from saline water (2 M KHCO₃ + 0.5 M NaCl aqueous solution) via the two-electron water oxidation reaction by a photoanode of bismuth vanadate (BiVO₄). Furthermore, the Faradaic efficiency (FE) and accumulation for H₂O₂ are improved by coating antimony tetroxide (Sb₂O₄) on BiVO₄. A H₂O₂ FE of 26% at 1.54 V vs RHE is obtained by Sb₂O₄/BiVO₄ and 49 ppm of H₂O₂ is accumulated after a 135 min chronoamperometry. Similar to that in KHCO₃ pure water solution, infrared spectroscopy and electrochemical analysis confirm that HCO₃^- plays a surface-mediating role in the formation of H₂O₂ in KHCO₃ saline water solution. The presence of HCO₃^- in the electrolyte is able to not only increase the photocurrent density but also effectively inhibit the chlorine evolution reaction.

Original language	English
Journal	Langmuir
DOIs	https://doi.org/10.1021/acs.langmuir.4c02510
Publication status	Accepted/In press - 2024
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.langmuir.4c02510

Cite this

@article{fef2d2e01e754f96bea6be8b2aaafd10,

title = "Photoelectrochemical Synthesis of Hydrogen Peroxide from Saline Water via the Two-Electron Water Oxidation Reaction",

abstract = "Hydrogen peroxide (H2O2) production on the anode is more valuable than oxygen and chlorine evolution for photoelectrochemical saline water splitting. In this work, by the introduction of bicarbonate (HCO3-), H2O2 is produced from saline water (2 M KHCO3 + 0.5 M NaCl aqueous solution) via the two-electron water oxidation reaction by a photoanode of bismuth vanadate (BiVO4). Furthermore, the Faradaic efficiency (FE) and accumulation for H2O2 are improved by coating antimony tetroxide (Sb2O4) on BiVO4. A H2O2 FE of 26% at 1.54 V vs RHE is obtained by Sb2O4/BiVO4 and 49 ppm of H2O2 is accumulated after a 135 min chronoamperometry. Similar to that in KHCO3 pure water solution, infrared spectroscopy and electrochemical analysis confirm that HCO3- plays a surface-mediating role in the formation of H2O2 in KHCO3 saline water solution. The presence of HCO3- in the electrolyte is able to not only increase the photocurrent density but also effectively inhibit the chlorine evolution reaction.",

author = "Wenlong Guo and Meng Li and Shanshan Wang and Yu He and Yun Zhou and Xin Lian",

note = "Publisher Copyright: {\textcopyright} 2024 American Chemical Society.",

year = "2024",

doi = "10.1021/acs.langmuir.4c02510",

language = "English",

journal = "Langmuir",

issn = "0743-7463",

publisher = "American Chemical Society",

}

TY - JOUR

T1 - Photoelectrochemical Synthesis of Hydrogen Peroxide from Saline Water via the Two-Electron Water Oxidation Reaction

AU - Guo, Wenlong

AU - Li, Meng

AU - Wang, Shanshan

AU - He, Yu

AU - Zhou, Yun

AU - Lian, Xin

PY - 2024

Y1 - 2024

N2 - Hydrogen peroxide (H2O2) production on the anode is more valuable than oxygen and chlorine evolution for photoelectrochemical saline water splitting. In this work, by the introduction of bicarbonate (HCO3-), H2O2 is produced from saline water (2 M KHCO3 + 0.5 M NaCl aqueous solution) via the two-electron water oxidation reaction by a photoanode of bismuth vanadate (BiVO4). Furthermore, the Faradaic efficiency (FE) and accumulation for H2O2 are improved by coating antimony tetroxide (Sb2O4) on BiVO4. A H2O2 FE of 26% at 1.54 V vs RHE is obtained by Sb2O4/BiVO4 and 49 ppm of H2O2 is accumulated after a 135 min chronoamperometry. Similar to that in KHCO3 pure water solution, infrared spectroscopy and electrochemical analysis confirm that HCO3- plays a surface-mediating role in the formation of H2O2 in KHCO3 saline water solution. The presence of HCO3- in the electrolyte is able to not only increase the photocurrent density but also effectively inhibit the chlorine evolution reaction.

AB - Hydrogen peroxide (H2O2) production on the anode is more valuable than oxygen and chlorine evolution for photoelectrochemical saline water splitting. In this work, by the introduction of bicarbonate (HCO3-), H2O2 is produced from saline water (2 M KHCO3 + 0.5 M NaCl aqueous solution) via the two-electron water oxidation reaction by a photoanode of bismuth vanadate (BiVO4). Furthermore, the Faradaic efficiency (FE) and accumulation for H2O2 are improved by coating antimony tetroxide (Sb2O4) on BiVO4. A H2O2 FE of 26% at 1.54 V vs RHE is obtained by Sb2O4/BiVO4 and 49 ppm of H2O2 is accumulated after a 135 min chronoamperometry. Similar to that in KHCO3 pure water solution, infrared spectroscopy and electrochemical analysis confirm that HCO3- plays a surface-mediating role in the formation of H2O2 in KHCO3 saline water solution. The presence of HCO3- in the electrolyte is able to not only increase the photocurrent density but also effectively inhibit the chlorine evolution reaction.

UR - http://www.scopus.com/inward/record.url?scp=85204044631&partnerID=8YFLogxK

U2 - 10.1021/acs.langmuir.4c02510

DO - 10.1021/acs.langmuir.4c02510

M3 - Article

AN - SCOPUS:85204044631

SN - 0743-7463

JO - Langmuir

JF - Langmuir

ER -

Photoelectrochemical Synthesis of Hydrogen Peroxide from Saline Water via the Two-Electron Water Oxidation Reaction

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this