Research and Application of Photoelectrocatalytic Materials

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Materials for Energy Applications".

Deadline for manuscript submissions: 20 February 2025 | Viewed by 798

Special Issue Editors


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Guest Editor
Anhui Province Key Laboratory of Value-Added Catalytic Conversion and Reaction, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
Interests: photoelectrochemical; water oxidation; cocatalysts; MOFs; coordination complex

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Guest Editor
School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China
Interests: solar energy conversion; photoelectrochemical; oxygen evolution catalysis; molecular catalysis; surface science

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Guest Editor
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
Interests: photo(electro)catalysis; non-metal inorganic materials; physical chemistry

Special Issue Information

Dear Colleagues,

Photoelectrocatalysis provides an effective and green approach to convert solar energy into chemical energy. In addition, it can also convert molecules like H2O, N2, and CO2 into high-value-added chemical products. In this vein, both photoanode and photocathode materials have been developed to drive oxidation and reduction half-reactions, respectively. However, their low efficiencies, caused by the rapid recombination of photogenerated electrons and holes, are critical scientific issues that urgently need to be addressed. So far, modulation strategies such as element doping, defect engineering, structural tuning, crystal facet engineering, interface regulation, heterojunction construction, and loading of cocatalysts have been explored as effective strategies for overcoming these drawbacks. Additionally, in recent years, various scientific issues have been the focus of research in the photoelectrocatalytic field, including the regulation and structure–activity relationship in functional materials, the mechanisms of photoelectrocatalytic reactions, the surface and interface charge transfer, etc.

In this Special Issue, we sincerely invite researchers to share their latest research findings in the application of photoelectrocatalytic materials to photoelectrode material development, device design, energy conservation, high-value-added chemical products, and pollutant removal/recycling. We hope that this Special Issue will serve as a platform for the exchange of ideas and opinions in this field and emphasize the significant achievements of photoelectrocatalytic functional materials, thus promoting the development of this important technology.

Dr. Yanming Fu
Dr. Xiaokang Wan
Dr. Zili Ma
Guest Editors

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Keywords

  • photoelectrocatalytic
  • photoelectrode materials
  • solar energy storage
  • high-value-added products
  • structure modulations
  • surface science

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Published Papers (1 paper)

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Research

13 pages, 5187 KiB  
Article
Combining Cocatalyst and Oxygen Vacancy to Synergistically Improve Fe2O3 Photoelectrochemical Water Oxidation Performance
by Chen Liu, Jiajuan Li, Wenyao Zhang and Changqing Zhu
Crystals 2025, 15(1), 85; https://doi.org/10.3390/cryst15010085 - 16 Jan 2025
Viewed by 460
Abstract
Considering the poor conductivity of Fe2O3 and the weak oxygen evolution reaction associated with it, surface hole accumulation leads to electron hole pair recombination, which inhibits the photoelectrochemical (PEC) performance of the Fe2O3 photoanode. Therefore, the key [...] Read more.
Considering the poor conductivity of Fe2O3 and the weak oxygen evolution reaction associated with it, surface hole accumulation leads to electron hole pair recombination, which inhibits the photoelectrochemical (PEC) performance of the Fe2O3 photoanode. Therefore, the key to improving the PEC water oxidation performance of the Fe2O3 photoanode is to take measures to improve the conductivity of Fe2O3 and accelerate the reaction kinetics of surface oxidation. In this work, the PEC performances of Fe2O3 photoanodes are synergistically improved by combining loaded an FeOOH cocatalyst and oxygen vacancy doping. Firstly, amorphous FeOOH layers are successfully prepared on Fe2O3 nanostructures through simple photoassisted electrodepositon. Then oxygen vacancies are introduced into FeOOH-Fe2O3 through plasma vacuum treatment, which reduces the content of Fe-O (OL) and Fe-OH (-OH), jointly promoting the generation of oxygen vacancies. Oxygen vacancy can increase the concentration of most carriers in Fe2O3 and form photo-induced charge traps, promoting the separation of electron holes and enhancing the conductivity of Fe2O3. The other parts of -OH act as oxygen evolution catalysts to reduce the reaction obstacle of water oxidation and promote the transfer of holes to the electrode/electrolyte interface. The performance of FeOOH-Fe2O3 after plasma vacuum treatment has been greatly improved, and the photocurrent density is about 1.9 times higher than that of the Fe2O3 photoanode. The improvement in the water oxidation performance of PEC is considered to be the synergistic effect of the cocatalyst and oxygen vacancy. All outstanding PEC response characteristics show that the modification of the cocatalyst and oxygen vacancy doping represent a favorable strategy for synergistically improving Fe2O3 photoanode performance. Full article
(This article belongs to the Special Issue Research and Application of Photoelectrocatalytic Materials)
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