Impact of Nickel Ions on the Oxygen Reduction Reaction Kinetics of Pt and on Oxygen Diffusion through Ionomer Thin Films

Kariuki, Nancy N.; Myers, Deborah J.

doi:10.1149/1945-7111/ac0651

Cited by 3 publications

(1 citation statement)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to pristine g-CN ( E onset ≈ 0.78 V), this value is enhanced by almost 60 mV ( Figure 4 ). Compared to the bulk (Bare) Pt, Pt@g-CN has a slightly lower E onset , which is expected because a pure Pt may have higher electrocatalytic activity, but the electrode preparation process is not economical [ 34 , 35 , 36 ]. The E onset of the commercial Pt/C (≈1 V) is also marginally better than that of our proposed electrode.…”

Section: Resultsmentioning

confidence: 99%

Metal–Support Interaction in Pt Nanodisk–Carbon Nitride Catalyst: Insight from Theory and Experiment

Doustkhah,

Kotb,

Balkan

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

Metal–support interaction plays a critical role in determining the eventual catalytic activity of metals loaded on supporting substrates. This interaction can sometimes cause a significant drop in the metallic property of the loaded metal and, hence, a drop in catalytic activity in the reactions, especially in those for which low charge carrier transfer resistance is a necessary parameter. Therefore, there should be a case-by-case experimental or theoretical (or both) in-depth investigation to understand the role of support on each metal. Here, onto a layered porous carbon nitride (g-CN), we grew single crystalline Pt nanodisks (Pt@g-CN) with a lateral average size of 21 nm, followed by various characterisations such as electron microscopy techniques, and the measurement of electrocatalytic activity in the O2 reduction reaction (ORR). We found that intercalating Pt nanodisks in the g-CN interlayers causes an increase in electrocatalytic activity. We investigated the bonding mechanism between carbon support and platinum using density functional theory and applied the d-band theory to understand the catalytic performance. Analysis of Pt’s density of states and electronic population across layers sheds light on the catalytic behaviour of Pt nanoparticles, particularly in relation to their thickness and proximity to the g-CN support interface. Our simulation reveals an optimum thickness of ~11 Å, under which the catalytic performance deteriorates.

show abstract

Section: Resultsmentioning

confidence: 99%

Metal–Support Interaction in Pt Nanodisk–Carbon Nitride Catalyst: Insight from Theory and Experiment

Doustkhah,

Kotb,

Balkan

et al. 2024

Nanomaterials

View full text Add to dashboard Cite

show abstract

Synthesis of platinum intermetallic nanoparticle fuel cell catalysts within secure inter-particle distance on carbon blacks

Peng

Zuo

Zeng

et al. 2023

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

Research Progress of Pt-Based Catalysts toward Cathodic Oxygen Reduction Reactions for Proton Exchange Membrane Fuel Cells

Chen,

Huang,

et al. 2024

Catalysts

View full text Add to dashboard Cite

Proton exchange membrane fuel cells (PEMFCs) have been considered by many countries and enterprises because of their cleanness and efficiency. However, due to their high cost and low platinum utilization rate, the commercialization process of PEMFC is severely limited. The cathode catalyst layer (CCL) plays an important role in manipulating the performance and lifespan of PEMFCs, which makes them one of the most significant research focuses in this community. In the CCL, the intrinsic activity and stability of the catalysts determine the performance and lifetime of the catalyst layer. In this paper, the composition and working principle of the PEMFC and cathode catalyst layer are briefly introduced, focusing on Pt-based catalysts for oxygen reduction reactions (ORRs). The research progress of Pt-based catalysts in the past five years is particularly reviewed, mainly concentrating on the development status of emerging Pt-based catalysts which are popular in the current research field, including novel concepts like phase regulation (intermetallic alloys and high-entropy alloys), interface engineering (coupled low-Pt/Pt-free catalysts), and single-atom catalysts. Finally, the future research and development directions of Pt-based ORR catalysts are summarized and prospected.

show abstract

Impact of Nickel Ions on the Oxygen Reduction Reaction Kinetics of Pt and on Oxygen Diffusion through Ionomer Thin Films

Cited by 3 publications

References 77 publications

Metal–Support Interaction in Pt Nanodisk–Carbon Nitride Catalyst: Insight from Theory and Experiment

Metal–Support Interaction in Pt Nanodisk–Carbon Nitride Catalyst: Insight from Theory and Experiment

Synthesis of platinum intermetallic nanoparticle fuel cell catalysts within secure inter-particle distance on carbon blacks

Research Progress of Pt-Based Catalysts toward Cathodic Oxygen Reduction Reactions for Proton Exchange Membrane Fuel Cells

Contact Info

Product

Resources

About