Advanced Electrocatalysts for Oxygen Reduction Reaction

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Electrocatalysis".

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 1046

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Guest Editor
State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science & Technology, Qingdao, China
Interests: electrocatalytic conversion of small molecules and DFT calculation

Special Issue Information

Dear Colleagues,

With the rapid growth of the global population and the accelerated development of society, the demand for energy has increased exponentially. However, the excessive use of traditional fossil fuels, such as non-renewable coal, oil, and natural gas, has led to severe environmental issues. Therefore, the exploration of low-carbon and clean energy in order to reduce the emission of greenhouse gases and achieve sustainable development has become a crucial task. Nonetheless, the intermittence and fluctuations in the supply of solar and wind energy limit their large-scale application. Consequently, the development of low-cost, long-life, and high-capacity secondary electrochemical energy storage devices has become a vital means of meeting the energy requirements of portable electronic devices, electric vehicles, and grid storage. Polymer electrolyte membrane fuel cells (PEMFCs) and metal air (oxygen) batteries are among the most promising technologies in this regard. The oxygen reduction reaction (ORR) in the cathode is the key to electrochemical conversion and energy storage, while the sluggish redox kinetics require highly efficient ORR catalysts. Therefore, the development of cost-effective ORR electrocatalysts with enhanced activity and improved durability is crucial for the widespread application of fuel cells. This Special Issue aims to cover recent advances and trends in the synthesis, characterization, and evaluation of advanced ORR electrocatalysts, as well as theoretical insights into the ORR to provide guidance for the rational design of high-performance ORR catalysts.

Dr. Yongchao Zhang
Guest Editor

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Keywords

  • ORR
  • fuel cell
  • metal–air battery
  • electrocatalysis
  • low carbon
  • electrochemical energy storage
  • high energy density

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Published Papers (1 paper)

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Research

12 pages, 4747 KiB  
Article
Sulfur Dioxide-Tolerant Core@shell Ru@Pt Catalysts Toward Oxygen Electro-Reduction
by Yuxin Liu, Changyuan Bao, Guodong Xu, Lei Du and Bing Huang
Catalysts 2025, 15(2), 139; https://doi.org/10.3390/catal15020139 - 3 Feb 2025
Viewed by 812
Abstract
Proton exchange membrane fuel cells (PEMFCs) have achieved milestones in performance improvements and commercial launches. In the typical commercialized PEMFCs, the compressed air to cathode is usually supplied from ambient air, assuming that no costly pre-purification system is applied. Therefore, the working PEMFCs [...] Read more.
Proton exchange membrane fuel cells (PEMFCs) have achieved milestones in performance improvements and commercial launches. In the typical commercialized PEMFCs, the compressed air to cathode is usually supplied from ambient air, assuming that no costly pre-purification system is applied. Therefore, the working PEMFCs may suffer from the negative effects of the air impurities. In this regard, SO2, as the most poisonous species, may be fed along with air at the cathode and strongly adsorbed on the Pt surface, leading to Pt site deactivation. To address this challenge, we published a series of works in terms of poisoning mechanisms, regeneration protocols, and advanced poisoning-tolerant catalysts. Herein, we are aiming at developing a SO2-tolerant electrocatalyst toward a cathodic oxygen reduction reaction (ORR). We reasonably incorporate the Ru, synthesize Ru@Pt core@shell catalysts and investigate the relationships among Ru incorporation, ORR activity and SO2 tolerance. Impressively, the Ru@Pt/C exhibits higher initial ORR activity (0.288 A mg−1Pt), better SO2 poisoning resistance (33% loss in initial activity) than that of commercial Pt/C catalysts (0.252 A mg−1Pt; 62% loss). The engineered affinity between Pt and SO2 in the presence of Ru is uncovered to account for the improvement. Full article
(This article belongs to the Special Issue Advanced Electrocatalysts for Oxygen Reduction Reaction)
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