In Situ FT-IR Investigation of Methanol and CO Electrooxidation on Cubic and Octahedral/Tetrahedral Pt Nanoparticles Having Residual PVP

Levendorf, Augusta M.; Sun, Shi‐Gang; Tong, YuYe J.

doi:10.1007/s12678-014-0186-1

Cited by 9 publications

(12 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, this simple decontamination was shown to be also effective with cubic Pd nanoparticles prepared in the presence of cetyltrimethylammonium bromide (CTAB) [35,36] and cubic Pt nanoparticles prepared in the presence of tetradecyltrimethylammonium bromide (TTAB) [37,38]. However, this cleaning resulted ineffective with shaped Pt nanoparticles prepared with polyvinylpyrrolidone (PVP) [37,39] which is one of the most usual capping agents for the preparation of shape-controlled metal nanoparticles [40]. To the best of our knowledge, the first example of clean shape-controlled Pt nanoparticles prepared with PVP was reported by Monzó et al [41 ].…”

Section: Surface Cleaning Methodologiesmentioning

confidence: 99%

Electrocatalysis on shape-controlled metal nanoparticles: Progress in surface cleaning methodologies

Montiel

Vidal‐Iglesias

Montiel

et al. 2017

Current Opinion in Electrochemistry

View full text Add to dashboard Cite

The use of shape-controlled metal nanoparticles has produced not only a clear enhancement in the electrocatalytic activity of different reactions of interest but also a better understanding of the effect of the surface structure on nanoscaled materials. However, it is well-accepted that a correct understanding of the correlations between shape/surface structure and electrochemical reactivity indispensably requires the use of clean surfaces. In this regard, and considering that most of the synthetic methodologies available in the literature for the preparation of these shaped metal nanoparticles employ capping agents, the development of effective surface cleaning methodologies able to remove such capping agents from the surface of the corresponding nanoparticles, becomes an extremely important prerequisite to subsequently evaluate their electrocatalytic properties for any reaction of interest.Consequently, in this contribution, we summarize the most relevant advances about surface cleaning procedures applied to different shaped metal nanoparticles for electrocatalytic purposes. It is worth mentioning that this work will only include contributions in which the surface cleanness of the samples is specifically evaluated using well-established electrochemical tools.

show abstract

Section: Surface Cleaning Methodologiesmentioning

confidence: 99%

Electrocatalysis on shape-controlled metal nanoparticles: Progress in surface cleaning methodologies

Montiel

Vidal‐Iglesias

Montiel

et al. 2017

Current Opinion in Electrochemistry

View full text Add to dashboard Cite

show abstract

“…The enhanced electrocatalytic activity of the Pt/C nanocubes for MOR could be achieved due to the better dispersion and dominantly exposed (1 0 0) facets as compared to Pt nanospheres/C and commercial Pt/C [8]. The specific activity of as-prepared Pt nanocubes/C is also found to be 2.4 and 3.3 times greater than the specific activity of Pt nanocubes reported in previous literatures [40,41]. We suggest that this improvement might be due to the clean surface of Pt nanocubes directly grown on carbon supports.…”

Section: Resultsmentioning

confidence: 58%

Shape-controlled Pt nanocubes directly grown on carbon supports and their electrocatalytic activity toward methanol oxidation

et al. 2017

View full text Add to dashboard Cite

“…Unfortunately, this cleaning protocol did not provide satisfactory results with shaped Pt nanoparticles prepared with polyvinylpyrrolidone (PVP) [76,[81][82][83]. In these contributions, the absence of well-defined voltammetric features denoted the important presence of residual PVP blocking the surface sites.…”

Section: Surface Cleaning Methodologies For Shape-controlled Metal Namentioning

confidence: 99%

Shape-controlled metal nanoparticles for electrocatalytic applications

Cruz

Montiel

Solla-Gullón

2018

Physical Sciences Reviews

View full text Add to dashboard Cite

Abstract The application of shape-controlled metal nanoparticles is profoundly impacting the field of electrocatalysis. On the one hand, their use has remarkably enhanced the electrocatalytic activity of many different reactions of interest. On the other hand, their usage is deeply contributing to a correct understanding of the correlations between shape/surface structure and electrochemical reactivity at the nanoscale. However, from the point of view of an electrochemist, there are a number of questions that must be fully satisfied before the evaluation of the shaped metal nanoparticles as electrocatalysts including (i) surface cleaning, (ii) surface structure characterization, and (iii) correlations between particle shape and surface structure. In this chapter, we will cover all these aspects. Initially, we will collect and discuss about the different practical protocols and procedures for obtaining clean shaped metal nanoparticles. This is an indispensable requirement for the establishment of correct correlations between shape/surface structure and electrochemical reactivity. Next, we will also report how some easy-to-do electrochemical experiments including their subsequent analyses can enormously contribute to a detailed characterization of the surface structure of the shaped metal nanoparticles. At this point, we will remark that the key point determining the resulting electrocatalytic activity is the surface structure of the nanoparticles (obviously, the atomic composition is also extremely relevant) but not the particle shape. Finally, we will summarize some of the most significant advances/results on the use of these shaped metal nanoparticles in electrocatalysis covering a wide range of electrocatalytic reactions including fuel cell-related reactions (electrooxidation of formic acid, methanol and ethanol and oxygen reduction) and also CO2 electroreduction. Graphical Abstract:

show abstract

In Situ FT-IR Investigation of Methanol and CO Electrooxidation on Cubic and Octahedral/Tetrahedral Pt Nanoparticles Having Residual PVP

Cited by 9 publications

References 25 publications

Electrocatalysis on shape-controlled metal nanoparticles: Progress in surface cleaning methodologies

Electrocatalysis on shape-controlled metal nanoparticles: Progress in surface cleaning methodologies

Shape-controlled Pt nanocubes directly grown on carbon supports and their electrocatalytic activity toward methanol oxidation

Shape-controlled metal nanoparticles for electrocatalytic applications

Contact Info

Product

Resources

About