Electrochemical Surface Science: From Fundamentals to Applications

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Characterization, Deposition and Modification".

Deadline for manuscript submissions: closed (30 November 2021) | Viewed by 2790

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, Yuan Ze Fuel Cell Center, Yuan Ze University, Taoyuan, Taiwan
Interests: manufacturing processes; electrochemical technologies and applications; wasted water treatment; CAD/CAM/CAE

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Guest Editor
Department of Power Mechanical Engineering, National Tsing Hua University, Taiwan
Interests: mechatronics systems; intelligent manufacture methods; optomechanics

Special Issue Information

Dear Colleagues,

In 1833, Faraday established the laws of electrolysis, which lay the foundation of both the electrodeposition and dissolution methods. Since then, the basic theories and applications of electrochemistry have been rapidly developed. Because the electrochemical process is stress-free with a minimal thermal effect, it has many advantages compared to traditional technologies which usually cause mechanical and thermal damages. The electrochemical reaction involves anodic dissolution which is at the atomic scale. Therefore, it is especially pertinent to nanoscale, thin film, and surface science/engineering.

The applications of electrochemical technology are broad and wide. In the mechanical production industry, electrochemical machining, electrochemical micromachining, and electrochemical deburring technologies are used successfully for surface feature fabrication. In the metal finishing industry, the electropolishing and anodizing processes have been employed for surface passivation to increase corrosion resistance. The electroplating and electrochemical mechanical polishing technologies have also been developed for surface coating and surface polishing. New materials and innovative products have also been developed, for example, disposable electrochemical sensors for clinical, industrial, and environmental tests, direct printing nanomaterials for sensor and fuel cell components, and gas diffusion electrodes for lithium/air cells.

Many new materials and innovation products are now requesting a surface with functionality. The need for surface science and surface engineering is increased. The aim of this Special Issue is to create a state-of-the-art summary of recent developments in fundamental understanding and innovative applications in surface science of electrochemical technologies.

Prof. Dr. Shuo-Jen Lee
Prof. Dr. Pei Jen Wang
Guest Editors

Manuscript Submission Information

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Keywords

  • Electropolishing (EP)/electrochemical pattern formation
  • Electrochemical machining (ECM)/electrochemical micromachining (ECMM)
  • Electroforming/electroplating
  • Anodizing/electrocoloring
  • Electrochemical polishing
  • Electrochemical passivation
  • Electrochemical science/models/theory

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Published Papers (1 paper)

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Research

15 pages, 4259 KiB  
Article
Enhancement of Charge Transport of a Dye-Sensitized Solar Cell Utilizing TiO2 Quantum Dot Photoelectrode Film
by Siti Nur Azella Zaine, Norani Muti Mohamed, Mehboob Khatani and Muhammad Umair Shahid
Coatings 2021, 11(12), 1442; https://doi.org/10.3390/coatings11121442 - 24 Nov 2021
Cited by 5 | Viewed by 2249
Abstract
A dye-sensitized solar cell (DSC) is the third generation of solar technology, utilizing TiO2 nanoparticles with sizes of 20–30 nm as the photoelectrode material. The integration of smaller nanoparticles has the advantage of providing a larger surface area, yet the presence of [...] Read more.
A dye-sensitized solar cell (DSC) is the third generation of solar technology, utilizing TiO2 nanoparticles with sizes of 20–30 nm as the photoelectrode material. The integration of smaller nanoparticles has the advantage of providing a larger surface area, yet the presence of grain boundaries is inevitable, resulting in a higher probability of electron trapping. This study reports on the improvement of charge transport through the integration of quantum dot (QD) TiO2 with a size of less than 10 nm as the dye absorption photoelectrode layer. The QD TiO2 samples were synthesized through sol–gel and reflux methods in a controlled pH solution without surfactants. The synthesized samples were analyzed using microscopic, diffraction, absorption, as well as spectroscopic analyses. A current–voltage and impedance analysis was used to evaluate the performance of a DSC integrated with synthesized TiO2 as the photoelectrode material. The sample with smaller crystallite structures led to a large surface area and exhibited a higher dye absorption capability. Interestingly, a DSC integrated with QD TiO2 showed a higher steady-state electron density and a lower electron recombination rate. The shallow distribution of the trap state led to an improvement of the electron trapping/de-trapping process between the Fermi level and the conduction band of oxide photoelectrode material, hence improving the lifetime of generated electrons and the overall performance of the DSC. Full article
(This article belongs to the Special Issue Electrochemical Surface Science: From Fundamentals to Applications)
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