Branched Pd and Pd-based trimetallic nanocrystals with highly open structures for methanol electrooxidation

Jing, Shengchang; Guo, Xueli; Tan, Yiwei

doi:10.1039/c5ta10046a

Cited by 32 publications

(15 citation statements)

References 63 publications

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“…Related mass activities were 448 mA mg(Pt) −1 , 644 mA mg(Pt) −1 , and 1615 mA mg(Pt) −1 , respectively ( Figure 7D). All these values were comparable or better than the recent previous data reported for the methanol electro-oxidation obtained, for example, on a highly dispersed platinum nanoparticles/carbon nitride materials in acidic media [38], on branched Pd and Pd-based trimetallic nanocrystals (NCs) with long, thin branches, and open structures operating in basic media [39], as well as on the Pt/Te bimetallic nanowires [40]. The oxidation peaks recorded in backward scan (at +160 mV, +440 mV, and +530 mV) were attributed to the removal of incompletely oxidized carbonaceous species formed in the forward scan on Pt, Te, and Pt-Te active sites, which appear to be heavily influenced on the three different concentrations of methanol tested.…”

Section: Electrochemical Characterization Of Tent/ptnp/gc Modified Elsupporting

confidence: 88%

Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for a Fuel Cell Anode/Cathode Working at a Neutral pH

et al. 2019

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In fuel-cell technology development, one of the most important objectives is to minimize the amount of Pt, the most employed material as an oxygen reduction and methanol oxidation electro-catalyst. In this paper, we report the synthesis and characterization of Te nanotubes (TeNTs) decorated with Pt nanoparticles, readily prepared from stirred aqueous solutions of PtCl2 containing a suspension of TeNTs, and ethanol acting as a reducing agent, avoiding the use of any hydrophobic surfactants such as capping stabilizing substance. The obtained TeNTs decorated with Pt nanoparticles (TeNTs/PtNPs) have been fully characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area diffraction patterns (SAD), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). We demonstrated that the new material can be successfully employed in fuel cells, either as an anodic (for methanol oxidation reaction) or a cathodic (for oxygen reduction reaction) electrode, with high efficiency in terms of related mass activities and on-set improvement. Remarkably, the cell operates in aqueous electrolyte buffered at pH 7.0, thus, avoiding acidic or alkaline conditions that might lead to, for example, Pt dissolution (at low pH), and paving the way for the development of biocompatible devices and on-chip fuel cells.

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Section: Electrochemical Characterization Of Tent/ptnp/gc Modified Elsupporting

confidence: 88%

Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for a Fuel Cell Anode/Cathode Working at a Neutral pH

et al. 2019

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“…Related mass activities are 448 mA mg(Pt) -1 , 644 mA mg(Pt) -1 and 1615 mA mg(Pt) -1 , respectively (Figure 6 D). All these values are comparable and/or better than recent previous data reported for methanol electro-oxidation as obtained, for example, on highly dispersed platinum nanoparticles/carbon nitride materials in acid media, [38] on branched Pd and Pd-based trimetallic nanocrystals (NCs) with long, thin branches and open structures operating in basic media, [39] as well as on Pt/Te bimetallic nanowires. [40] The oxidation peaks recorded in backward scan (at +160mV, +440mV, and +530 mV) were attributed to the removal of incompletely oxidized carbonaceous species formed in forward scan on Pt, Te and Pt-Te active sites, which appear to be heavily influenced on the three different concentrations of methanol tested.…”

Section: Electrochemical Characterization Of Tent/ptnp/gc Modified Elsupporting

confidence: 88%

Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for Fuel Cell Anode/Cathode Working at Neutral pH

Guascito¹,

Chirizzi²,

Filippo³

et al. 2019

Preprint

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In fuel-cell technological development, one of the most important objectives is to minimize the amount of Pt, the most employed material as oxygen reduction and methanol oxidation electro-catalyst. In this paper we report the synthesis and characterization of Te nanotubes (TeNTs) decorated with Pt nanoparticles, readily prepared from stirred aqueous solutions of PtCl2 containing a suspension of TeNTs and ethanol acting as a reducing agent, avoiding the use of any hydrophobic surfactants as capping stabilizing substance. The as obtained TeNTs decorated with Pt nanoparticles (TeNTs/PtNPs) have been fully characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area diffraction patterns (SAD), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV). We demonstrate that the new material can be successfully employed in fuel cell either as anodic (for methanol oxidation reaction) and cathodic (for oxygen reduction reaction) electrode with high efficiency in terms of related mass activities and on-set improvement. Remarkably, the cell operates in aqueous electrolyte buffered at pH 7.0, thus avoiding acidic or alkaline conditions that may lead e. g. to Pt dissolution (at low pH) and paving the way for the development of biocompatible devices and on chip fuel cells.

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“…Moreover, monometallic Pd preferentially adsorbs CO onto its surface, which leads to the poisoning of active sites and limited electrocatalytic activity and stability. [26][27][28][29] To address these drawbacks, it is imperative to optimize Pd nanocatalysts by endowing Pd with a modulated electronic structure and provide OH ads to boost the oxidation of adsorbed CO into CO 2 . [25,[30][31][32][33][34] Many studies have been dedicated to introducing one or more elements into Pd to modify the electronic structure of Pd and generate bimetallic or multimetallic Pd-based catalysts.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

Shang

Wang

et al. 2021

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Pd‐ and Pd‐based catalysts have emerged as potential alternatives to Pt‐ and Pt‐based catalysts for numerous electrocatalytic reactions, particularly fuel cell‐related reactions, including the anodic fuel oxidation reaction (FOR) and cathodic oxygen reduction reaction (ORR). The creation of Pd‐ and Pd‐based architectures with large surface areas, numerous low‐coordinated atoms, and high density of defects and edges is the most promising strategy for improving the electrocatalytic performance of fuel cells. Recently, 2D Pd‐based nanomaterials with single or few atom thickness have attracted increasing interest as potential candidates for both the ORR and FOR, owing to their remarkable advantages, including high intrinsic activity, high electron mobility, and straightforward surface functionalization. In this review, the recent advances in 2D Pd‐based nanomaterials for the FOR and ORR are summarized. A fundamental understanding of the FOR and ORR is elaborated. Subsequently, the advantages and latest advances in 2D Pd‐based nanomaterials for the FOR and ORR are scientifically and systematically summarized. A systematic discussion of the synthesis methods is also included which should guide researchers toward more efficient 2D Pd‐based electrocatalysts. Lastly, the future outlook and trends in the development of 2D Pd‐based nanomaterials toward fuel cell development are also presented.

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Branched Pd and Pd-based trimetallic nanocrystals with highly open structures for methanol electrooxidation

Abstract: Branched Pd and Pd-based trimetallic nanocrystals with long, thin branches and open structures were synthesized in high yields, which provides an avenue to developing high performance catalysts for methanol electrooxidation.

Cited by 32 publications

References 63 publications

Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for a Fuel Cell Anode/Cathode Working at a Neutral pH

Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for a Fuel Cell Anode/Cathode Working at a Neutral pH

Synthesis and Characterization of Te Nanotubes Decorated with Pt Nanoparticles for Fuel Cell Anode/Cathode Working at Neutral pH

Recent Progress of Ultrathin 2D Pd‐Based Nanomaterials for Fuel Cell Electrocatalysis

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