Determining kinetics of H2O2 evolution from photoelectrochemical water oxidation

Dongfeng Li, Ruifang Wei, Deyun Zhang, Chenwei Ni, Heng Yin, Lingcong Zhang, Fengtao Fan, Xiuli Wang () and Can Li ()
Additional contact information
Dongfeng Li: Dalian National Laboratory for Clean Energy
Ruifang Wei: Dalian National Laboratory for Clean Energy
Deyun Zhang: Dalian National Laboratory for Clean Energy
Chenwei Ni: Dalian National Laboratory for Clean Energy
Heng Yin: Dalian National Laboratory for Clean Energy
Lingcong Zhang: Dalian National Laboratory for Clean Energy
Fengtao Fan: Dalian National Laboratory for Clean Energy
Xiuli Wang: Dalian National Laboratory for Clean Energy
Can Li: Dalian National Laboratory for Clean Energy

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Photoelectrochemical water oxidation to generate H2O2 is a clean and promising method. Its performance is strongly dependent on electrolyte species, in which the Faradaic efficiency is considerably promoted by HCO3− anion. The kinetic mechanism is under debate, which is highly desired but challenging. Herein, we reveal the charge dynamics and reaction kinetics in the H2O2 evolution from photoelectrochemical water oxidation by time-resolved spectroscopic techniques. The H2O2 evolution reaction exhibits the same first-hole transfer dynamics as that in O2 evolution reaction. The rate law analysis indicates that H2O2 evolution reaction exhibits the first-order reaction kinetics, demonstrating that the rate-determining step in 2e− water oxidation reaction for H2O2 evolution is the consumption of the first-hole intermediates. Importantly, the HCO3− anion accelerates the consumption of the first-hole intermediates in 2e− water oxidation reaction by about 30 fold in rate constants or 60 fold in turnover frequency relative that in 4e− water oxidation reaction. This work sheds light on the control strategy for reaction selectivity by modulation of reaction kinetics in catalysis.

Date: 2025
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-62828-1 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-62828-1

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-62828-1

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().