Amplified hybrid surface plasmon polaritons in partially reduced graphene oxide supported on gold

Mohajer, Salman; Sharif, Morteza A.; Aghdam, Afsaneh Hosseini; Borjkhani, Mehdi; Assadi, M. Hussein N.

doi:10.1016/j.apsusc.2023.158120

Cited by 4 publications

(1 citation statement)

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“…From the d -band shifts, electronic changes in the supported metal can also be distinguished, explaining the changes in the catalytic activity. Accordingly, the d -band centre in metal nanostructures is responsible for the charge transfer and, therefore, the catalytic performance [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

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

Doustkhah,

Kotb,

Balkan

et al. 2024

Nanomaterials

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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.

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Section: Introductionmentioning

confidence: 99%