2014
DOI: 10.1021/jp5063513
|View full text |Cite
|
Sign up to set email alerts
|

Bismuth and CO Coadsorption on Platinum Nanoparticles

Abstract: CO adsorption onto Pt-and Pt-based catalysts is a very relevant topic in electrocatalysis, and in particular, in fuel cells research. CO is known to be the main responsible of the poisoning of the catalysts and consequent decrease on performance of the fuel cells devices. In this paper, density functional theory (DFT) calculations and experiments were combined to access the effect of modifying Pt nanoparticles with Bi on CO adsorption. CO adsorption energies were calculated for Pt sites nearby Bi atoms in diff… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

1
7
0
2

Year Published

2016
2016
2023
2023

Publication Types

Select...
6
1

Relationship

1
6

Authors

Journals

citations
Cited by 17 publications
(10 citation statements)
references
References 39 publications
1
7
0
2
Order By: Relevance
“…In this case, there was also a decrease of coverage from 0.54 to 0.47 during the first potential hold. This sudden decrease, which was not observed in acid or neutral conditions, can be a result of a Bi layer reorganization into larger islands in an alkaline solution [24,31] .…”
Section: Stability Of Irreversibly Adsorbed Bi On Pt/cmentioning
confidence: 79%
See 1 more Smart Citation
“…In this case, there was also a decrease of coverage from 0.54 to 0.47 during the first potential hold. This sudden decrease, which was not observed in acid or neutral conditions, can be a result of a Bi layer reorganization into larger islands in an alkaline solution [24,31] .…”
Section: Stability Of Irreversibly Adsorbed Bi On Pt/cmentioning
confidence: 79%
“…Scanning tunneling microscopy (STM) studies have shown that multilayer islands of Bi form on the Pt surface, which are reorganized to monolayer islands through reduction and oxidation of Bi [22,23] . Bi atoms are highly mobile on the Pt surface and form ordered structures when the surface is exposed to other adsorbates [24] , which have been proved by STM [25] , low energy electron diffraction [26] and X-ray scattering studies [27] .…”
Section: Introductionmentioning
confidence: 99%
“…Besides, the CO electro‐oxidation onset potential of Bi‐modified Pt catalysts was higher than Pt/NCNTs, suggesting that the presence of Bi made the adsorbed CO more difficult to be oxidized. Hence, the blocking effect of Bi suppressed the adsorption and oxidation of poisonous CO on Pt active sites,, which was favored for Pt catalyst applied in electro‐oxidation of glycerol and formic acid.…”
Section: Resultsmentioning
confidence: 99%
“…They prepared an atomic layer of Pt on the usual NPG thin films of 100 nm thick either by chemical deposition or Cu underpotential deposition (UPD) mediated deposition. Then, the Pt/NPG structures were decorated by submonolayer Bi by immersing the structure in 5 mM Bi(III) containing 0.1 M HClO 4 solution and electrochemically reducing it from the open circuit potential to 0 V. Pt alloying with Bi was intended to alleviate the serious poisoning of Pt by CO and other intermediate molecules [20] . Although Pt usage was minimized down to 3 μg/cm 2 and the entire anode thickness was only 300 nm, catalytic activity and power performance of the electrode were surprisingly better than those of conventional Pt/C anode that had the same Pt loading but was 40 μm thick.…”
Section: Application To Fuel Cellsmentioning
confidence: 99%