scholarly journals The mechanism of Co oxyhydroxide nano-islands deposited on a Pt surface to promote the oxygen reduction reaction at the cathode of fuel cells

RSC Advances ◽  
2020 ◽  
Vol 10 (73) ◽  
pp. 44719-44727
Author(s):  
Jinghao Lu ◽  
Libin Yang ◽  
Wei Guo ◽  
Songtao Xiao ◽  
Lingyu Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Binding Energy ◽  
Oxygen Reduction Reaction ◽  
Bond Length ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Band Center ◽  
Orr Activity ◽  
Positive Effect

The Pt–OCoOH structure has a positive effect on the ORR; the bond length, binding energy and d-band center were investigated to explain the improved ORR activity.

scholarly journals Pt-Based Intermetallic Nanocrystals in Cathode Catalysts for Proton Exchange Membrane Fuel Cells: From Precise Synthesis to Oxygen Reduction Reaction Strategy

Catalysts ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1050
Author(s):  
Peng Gao ◽  
Min Pu ◽  
Qingjun Chen ◽  
Hong Zhu
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Cathode Catalysts ◽  
Wide Range ◽  
Orr Activity ◽  
Exchange Membrane

Although oxygen reduction reaction (ORR) catalysts have been extensively investigated and developed, there is a lack of clarity on catalysts that can balance high performance and low cost. Pt-based intermetallic nanocrystals are of special interest in the commercialization of proton exchange membrane fuel cells (PEMFCs) due to their excellent ORR activity and stability. This review summarizes the wide range of applications of Pt-based intermetallic nanocrystals in cathode catalysts for PEMFCs and their unique advantages in the field of ORR. Firstly, we introduce the fundamental understanding of Pt-based intermetallic nanocrystals, and highlight the difficulties and countermeasures in their synthesis. Then, the progress of theoretical and experimental studies related to the ORR activity and stability of Pt-based intermetallic nanocrystals in recent years are reviewed, especially the integrated strategies for enhancing the stability of ORR. Finally, the challenges faced by Pt-based intermetallic nanocrystals are summarized and future research directions are proposed. In addition, numerous design ideas of Pt-based intermetallic nanocrystals as ORR catalysts are summarized, aiming to promote further development of commercialization of PEMFC catalysts while fully understanding Pt-based intermetallic nanocrystals.

Assessing the Oxygen Reduction Reaction by a 2-electron Mechanism on Ceria Surfaces

2021 ◽  
Author(s):  
Mauro C dos Santos ◽  
Lanna Lucchetti ◽  
James Almeida ◽  
Pedro Alves da Silva Autreto
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction

The 2-electron pathway of the oxygen reduction reaction is an unwanted process in the development of fuel cells. In contrast, it has gained the scientific community’s attention due to its...

scholarly journals Design of ternary Pt-CoZn alloy catalysts coated with N-doped carbon towards acidic oxygen reduction

2021 ◽  
Author(s):  
Xieweiyi Ye ◽  
Yakun Xue ◽  
Kaijia Li ◽  
Wen Tang ◽  
Xiao Han ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Commercial Applications ◽  
Exchange Membrane ◽  
Alloy Catalysts

Improving the activity and durability of Pt-based electrocatalysts used in the acidic oxygen reduction reaction (ORR) is a great task for the commercial applications of proton-exchange membrane fuel cells. Alloying...

Development of high stable Pt-based ORR catalyst over Mn-modified polyaniline-based carbon nanofiber

2021 ◽  
Author(s):  
Hong Zhu ◽  
Qingjun Chen ◽  
Jinghua Yu ◽  
Qian Zhou ◽  
Fanghui Wang ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Proton Exchange Membrane ◽  
Carbon Nanofiber ◽  
Carbon Support ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Key Factors ◽  
Exchange Membrane

The corrosion of carbon support is one of key factors causing deactivation of Pt-based oxygen reduction reaction (ORR) catalysts for proton exchange membrane fuel cells. In this work, a highly...

Efficient Fe–Nx/C Electrocatalyst for Oxygen Reduction Reaction Derived from Porphyrin- Encapsulated Zeolitic Imidazolate Frameworks

2021 ◽  
Author(s):  
Jung Won Park ◽  
Byung Hoon Kim ◽  
Miyeon Kim ◽  
Junyoung Mun ◽  
Chang Yeon Lee
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Platinum Catalysts ◽  
Reduction Reaction ◽  
Zeolitic Imidazolate Frameworks

The development of non-platinum catalysts for the oxygen reduction reaction (ORR) in fuel cells is an urgent challenge given the limited reserves of platinum. The Fe–Nx/C electrocatalyst possessing isolated atomic...

scholarly journals Theoretical probing possible degradation mechanisms of FeNC catalyst during oxygen reduction reaction

2021 ◽  
Author(s):  
Na Yang ◽  
Lanlan Peng ◽  
Li Li ◽  
Jing Li ◽  
Qiang Liao ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Degradation Mechanisms ◽  
Practical Application ◽  
Operating Condition

For FeNC catalyst widely used in oxygen reduction reaction (ORR), its instability under Fuel Cells (FCs) operating condition has become the biggest obstacle to the practical application. The complexity of...

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