Activity Enhancement of Tetrahexahedral Pd Nanocrystals by Bi Decoration towards Ethanol Electrooxidation in Alkaline Media

Wang, Ping; Lin, Xingyi; Yang, Bo; Jin, Jia; Hardacre, Christopher; Yu, Nengfei; Sun, Shi‐Gang; Lin, Wen‐Feng

doi:10.1016/j.electacta.2015.02.177

Cited by 13 publications

(6 citation statements)

References 47 publications

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“…Only one work can be find on the decoration of as-prepared THH Pt NPs with electrochemical methods by Bi adatoms. [48] In this work, a significant enhancement of the EOR was reported by increasing the coverage of Bi, being 0.68 the optimum coverage value.…”

Section: Electrochemical Synthesismentioning

confidence: 57%

“…However, to the best of our knowledge, shape‐controlled materials based on non‐noble metals materials have been synthesized by using electrochemical methods. Only one work can be find on the decoration of as‐prepared THH Pt NPs with electrochemical methods by Bi adatoms . In this work, a significant enhancement of the EOR was reported by increasing the coverage of Bi, being 0.68 the optimum coverage value.…”

Section: Shape‐controlled Metal Nanoparticles For the Eormentioning

confidence: 74%

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Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

2019

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Direct ethanol fuel cells are a promising technology for clean energy production. The ethanol oxidation reaction (EOR) is surface sensitive and, hence, the study of single‐crystal electrodes provides fundamental knowledge of the different activity of the metal crystal planes. However, for practical applications, metal nanoparticles dispersed on a porous support are generally used to enhance the efficiency and to reduce the catalyst cost. Although some research has been devoted to the development of shape‐controlled nanoparticles, the finding of an efficient, cost‐effective, and easily scaled‐up catalytic system remains a challenge. Furthermore, the use of a suitable support with a well‐defined nanoarchitecture is essential for the control of the catalyst reactivity. In this Review, a general overview of the performance of single‐crystal electrodes and unsupported/supported shape‐controlled nanoparticles for the EOR is presented, paying special attention to Pt surfaces. Finally, the major challenges and directions for future research are also discussed to guide the design of efficient shape‐controlled catalysts for the EOR.

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Section: Electrochemical Synthesismentioning

confidence: 57%

Section: Shape‐controlled Metal Nanoparticles For the Eormentioning

confidence: 74%

Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

2019

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“…Under the alkaline type direct ethanol fuel cell operation conditions, the oxidation current peak in the forward CV potential scan can be used to evaluate the catalytic activity, as it is associated with the oxidation of ethanol and the adsorbed species produced from ethanol dissociation on the catalyst surface. The reverse scan may include the surface oxide (formed on the forward scan) reduction current overlapped with ethanol oxidation current 52 . Two AuNPs/PEDOT:PSS nanocomposites samples, namely Sample 1: AuNP/PEDOT:PSS (from 2 μM precursor, 5 min plasma treatment, average AuNP diameter 4.1 nm) and Sample 2: AuNP/PEDOT:PSS (from 200 μM precursor, 5 min plasma treatment, average AuNP diameter 35 nm), were selected.…”

Section: Resultsmentioning

confidence: 99%

Gold nanoparticle-polymer nanocomposites synthesized by room temperature atmospheric pressure plasma and their potential for fuel cell electrocatalytic application

Zhang

Sun

Zhang

et al. 2017

Sci Rep

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Conductive polymers have been increasingly used as fuel cell catalyst support due to their electrical conductivity, large surface areas and stability. The incorporation of metal nanoparticles into a polymer matrix can effectively increase the specific surface area of these materials and hence improve the catalytic efficiency. In this work, a nanoparticle loaded conductive polymer nanocomposite was obtained by a one-step synthesis approach based on room temperature direct current plasma-liquid interaction. Gold nanoparticles were directly synthesized from HAuCl4 precursor in poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The resulting AuNPs/PEDOT:PSS nanocomposites were subsequently characterized under a practical alkaline direct ethanol fuel cell operation condition for its potential application as an electrocatalyst. Results show that AuNPs sizes within the PEDOT:PSS matrix are dependent on the plasma treatment time and precursor concentration, which in turn affect the nanocomposites electrical conductivity and their catalytic performance. Under certain synthesis conditions, unique nanoscale AuNPs/PEDOT:PSS core-shell structures could also be produced, indicating the interaction at the AuNPs/polymer interface. The enhanced catalytic activity shown by AuNPs/PEDOT:PSS has been attributed to the effective electron transfer and reactive species diffusion through the porous polymer network, as well as the synergistic interfacial interaction at the metal/polymer and metal/metal interfaces.

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“…On the other hand, ethanol electrooxidation is also suitable of being optimized by using adatom-decorated shaped metal nanoparticles. For instance, Wang et al studied Bi-decorated THH Pd nanoparticles towards ethanol oxidation in alkaline medium [249]. The activity of the Bi-decorated samples was found to be about 3 and 12 times higher than that of bare THH Pd nanoparticles and a Pd/C catalyst, respectively, at the optimum Bi coverage.…”

Section: Ethanol Electrooxidationmentioning

confidence: 99%

Shape-controlled metal nanoparticles for electrocatalytic applications

Cruz

Montiel

Solla-Gullón

2018

Physical Sciences Reviews

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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:

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Activity Enhancement of Tetrahexahedral Pd Nanocrystals by Bi Decoration towards Ethanol Electrooxidation in Alkaline Media

Cited by 13 publications

References 47 publications

Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

Well‐Defined Platinum Surfaces for the Ethanol Oxidation Reaction

Gold nanoparticle-polymer nanocomposites synthesized by room temperature atmospheric pressure plasma and their potential for fuel cell electrocatalytic application

Shape-controlled metal nanoparticles for electrocatalytic applications

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