scholarly journals Evaluating Electrocatalysts at Relevant Currents in a Half-Cell: The Impact of Pt Loading on Oxygen Reduction Reaction

2019 ◽  
Vol 166 (16) ◽  
pp. F1259-F1268 ◽  
Author(s):  
Konrad Ehelebe ◽  
Dominik Seeberger ◽  
Mike T. Y. Paul ◽  
Simon Thiele ◽  
Karl J. J. Mayrhofer ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Half Cell ◽  
The Impact

scholarly journals The impact of spectator species on the interaction of H2O2 with platinum – implications for the oxygen reduction reaction pathways

2013 ◽  
Vol 15 (21) ◽  
pp. 8058 ◽  
Author(s):  
Ioannis Katsounaros ◽  
Wolfgang B. Schneider ◽  
Josef C. Meier ◽  
Udo Benedikt ◽  
P. Ulrich Biedermann ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Reaction Pathways ◽  
The Impact

Systematic study of precursor effects on structure and oxygen reduction reaction activity of FeNC catalysts

2021 ◽  
Vol 379 (2209) ◽  
pp. 20200337
Author(s):  
Pascal Theis ◽  
W. David Z. Wallace ◽  
Lingmei Ni ◽  
Markus Kübler ◽  
Annika Schlander ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Large Area ◽  
Constant Weight ◽  
Structural Composition ◽  
The Impact ◽  
Template Size ◽  
Weight Loading

In this work, the effect of porphyrin loading and template size is varied systematically to study its impact on the oxygen reduction reaction (ORR) activity and selectivity as followed by rotating ring disc electrode experiments in both acidic and alkaline electrolytes. The structural composition and morphology are investigated by 57 Fe Mössbauer spectroscopy, transmission electron microscopy, Raman spectroscopy and Brunauer–Emmett–Teller analysis. It is shown that with decreasing template size, specifically the ORR performance towards fuel cell application gets improved, while at constant area loading of the iron precursor (here expressed in number of porphyrin layers), the iron signature does not change much. Moreover, it is well illustrated that too large area loadings result in the formation of undesired side phases that also cause a decrease in the performance, specifically in acidic electrolyte. Thus, if the impact of morphology is the focus of research it is important to consider the area loading rather than its weight loading. At constant weight loading, beside morphology the structural composition can also change and impact the catalytic performance. This article is part of the theme issue ‘Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)’.

scholarly journals Comparative Study of PtNi Nanowire Array Electrodes toward Oxygen Reduction Reaction by Half-Cell Measurement and PEMFC Test

2020 ◽  
Vol 12 (38) ◽  
pp. 42832-42841
Author(s):  
Peter Mardle ◽  
Gnanavel Thirunavukkarasu ◽  
Shaoliang Guan ◽  
Yu-Lung Chiu ◽  
Shangfeng Du
Keyword(s):  
Comparative Study ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Nanowire Array ◽  
Reduction Reaction ◽  
Half Cell ◽  
Cell Measurement

Theoretical analysis of oxygen reduction reaction and H2O2 formation and the impact of CF3SO3H coverage on Pt (111)

2010 ◽  
Vol 604 (11-12) ◽  
pp. 965-973 ◽  
Author(s):  
Atsushi Ohma ◽  
Takashi Ichiya ◽  
Kazuyoshi Fushinobu ◽  
Ken Okazaki
Keyword(s):  
Theoretical Analysis ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
H2o2 Formation ◽  
The Impact

scholarly journals The Activity Enhancement Effect of Ionic Liquids on Oxygen Reduction Reaction Catalysts: From Rotating Disk Electrode to Membrane Electrode Assembly

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 989
Author(s):  
Kan Huang ◽  
Oscar Morales-Collazo ◽  
Zhichao Chen ◽  
Tangqiumei Song ◽  
Liang Wang ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Membrane Electrode Assembly ◽  
Reduction Reaction ◽  
Proton Exchange ◽  
Membrane Electrode ◽  
Enhancement Effect ◽  
Chemical Structures ◽  
The Impact

Ionic liquids (ILs) have been explored as a surface modification strategy to promote the oxygen reduction reaction (ORR) on Pt/C and their chemical structures were identified to have strong influence on the ORR activities. To better understand the roles of anion and cation of ILs on the catalytic reaction, two cations ([MTBD]+ and [bmim]+) were paired with three anions ([TFSI]−, [beti]−, and [C4F9SO3]−) to form various IL structures. By systematically varying the IL combinations and studying their effects on the electrochemical behaviors, such as electrochemical surface area and specific ORR activities, it was found that cation structure had a higher influence than anion, and the impact of the [MTBD]+ series was stronger than the [bmim]+ series. In addition to the investigation in the half-cell, studies were also extended to the membrane electrode assembly (MEA). Considerable performance enhancements were demonstrated in both the kinetic region and high current density region with the aid of IL. This work suggests that IL modification can provide a complementary approach to improve the performance of proton exchange membrane fuel cells.

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