Insight into 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: 30 September 2025 | Viewed by 1156

Special Issue Editor


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Guest Editor
School of Materials Science and Engineering, Jilin University, Changchun, China
Interests: micro-nano scale energy materials; metal matrix composites; electrocatalysis

Special Issue Information

Dear Colleagues,

Oxygen reduction reaction, as a crucial process in the clean energy and chemical engineering fields, has become one of the hottest topics. Exploiting high-performance catalysts for oxygen reduction reaction is a key to promoting the commercialization of fuel cells, metal-air batteries and hydrogen peroxide electrosynthesis. The ideal electrocatalysts must be of efficient, durable, high selectivity and low-cost. Although some encouraging results have been achieved in recent years, the growing requirement for oxygen reduction reaction catalysts is not yet being met.

This special issue focuses on new insights in the development of advanced and innovative electrocatalysts for oxygen reduction reaction, including but are not limited to unique structure and composition design, novel synthesis strategy exploration, catalytic mechanism comprehension and practical application achievement. Both Original Research and Review articles are welcome.

Prof. Dr. Chuncheng Yang
Guest Editor

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Keywords

  • oxygen reduction reaction
  • electrocatalysts
  • structure design
  • catalytic mechanism
  • practical applications

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Published Papers (1 paper)

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Research

13 pages, 1568 KiB  
Article
Methanol-Tolerant Pd-Co Alloy Nanoparticles on Reduced Graphene Oxide as Cathode Catalyst for Oxygen Reduction in Fuel Cells
by Chandra Sekhar Yellatur, Venkatachalam Vinothkumar, Poshan Kumar Reddy Kuppam, Juwon Oh and Tae Hyun Kim
Catalysts 2025, 15(2), 128; https://doi.org/10.3390/catal15020128 - 29 Jan 2025
Viewed by 872
Abstract
The design of efficient and cost-effective electrocatalysts to replace Pt in an oxygen reduction reaction (ORR) is crucial for advancing proton exchange membrane fuel cell (PEMFC) technologies. This study synthesized Pd-Co bimetallic alloy nanoparticles supported on reduced graphene oxide (rGO) through a simple [...] Read more.
The design of efficient and cost-effective electrocatalysts to replace Pt in an oxygen reduction reaction (ORR) is crucial for advancing proton exchange membrane fuel cell (PEMFC) technologies. This study synthesized Pd-Co bimetallic alloy nanoparticles supported on reduced graphene oxide (rGO) through a simple chemical-reduction method, making it suitable for low-cost, large-scale fabrication and significantly reducing the need for Pt. The nanostructures were systematically characterized using various analytical techniques, including X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray spectroscopy (EDX), and cyclic voltammetry (CV). Electrochemical investigations revealed that the Pd-Co/rGO catalyst exhibits remarkable ORR performance in an alkaline environment, with an electrode-area-normalized activity rivaling that of the commercial Pt/C catalyst. Remarkably, Pd-Co/rGO demonstrated an onset potential (Eonset) of 0.944 V (vs. RHE) and a half-wave potential (E1/2) of 0.782 V (vs. RHE), highlighting its excellent ORR activity. Furthermore, the Pd-Co/rGO catalyst displayed superior methanol-tolerant ORR activity, outperforming Pt/C and monometallic Pd/rGO and Co/rGO systems. The enhanced electrocatalytic performance is attributed to the smallest size, consistent shape, and good dispersion of the alloy structure on the RGO surface. These findings establish Pd-Co/rGO as a promising alternative to Pt-based catalysts, addressing key challenges such as methanol crossover while advancing PEMFC technology in alkaline media. Full article
(This article belongs to the Special Issue Insight into Electrocatalysts for Oxygen Reduction Reaction)
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