Mixed-phase Pd–Pt bimetallic alloy on graphene oxide with high activity for electrocatalytic applications

Khan, Majid; Yousaf, Ammar Bin; Chen, Mingming; Wei, Chengsha; Wu, Xibo; Huang, Ningdong; Qi, Zeming; Li, Liangbin

doi:10.1016/j.jpowsour.2015.02.090

Cited by 56 publications

(15 citation statements)

References 39 publications

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“…Thus, it could concluded that the higher crystallite size might results in high degree of alloying. The degree of alloying was calculated using Vegard's law and using the relation given in Khan et al [48] shown in Eq. 5and Eq.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Pd and Pt Based Low Cost Bimetallic Anode Electrocatalyst for Glycerol Electrooxidation in Membraneless Air Breathing Microfluidic Fuel Cell

Panjiara

Pramanik

2021

J. Electrochem. Sci. Technol

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The different weight ratios of Pd to Pt, i.e., 16:4, 10:10, 4:16 in Pd-Pt/C and Pd (20 wt. %) /C electrocatalysts with low metal loading were synthesized for glycerol electrooxidation in an air breathing microfluidic fuel cell (MFC). The cell performance on Pd-Pt (16:4)/C anode electrocatalyst was found best among all the electrocatalysts tested. The single cell when tested at a temperature of 35 o C using Pd-Pt (16:4)/C, showed maximum open circuit voltage (OCV) of 0.70 V and maximum power density of 2.77 mW/cm 2 at a current density of 7.71 mA/cm 2. The power density increased 1.45 times when cell temperature was raised from 35 o C to 75 o C. The maximum OCV of 0.78 V and the maximum power density of 4.03 mW/cm 2 at a current density of 10.47 mA/cm 2 were observed at the temperature of 75 o C. The results of CV substantiate the single cell performance for various operating parameters.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Pd and Pt Based Low Cost Bimetallic Anode Electrocatalyst for Glycerol Electrooxidation in Membraneless Air Breathing Microfluidic Fuel Cell

Panjiara

Pramanik

2021

J. Electrochem. Sci. Technol

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“…For instance, enhanced ORR activity has been observed with copper oxide nanoparticles grown on nitrogen‐doped RGO surface, in comparison to N‐RGO alone or CuO/GO composites . Studies have also been carried out with nanocomposites based on graphene‐supported metal alloy nanoparticles or metal oxide nanoparticles such as Co 3 O 4 and Co/CoO . In these prior studies, the ORR results are interpreted within the context where graphene derivatives primarily serve as a structural support to enhance dispersion and minimize aggregation of the nanoparticle catalysts.…”

Section: Graphene As Supporting Substratesmentioning

confidence: 99%

Multifunctional graphene‐based nanostructures for efficient electrocatalytic reduction of oxygen

Liu

Deming

et al. 2015

J. Chem. Technol. Biotechnol.

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Graphene derivatives have been used extensively as a functional support for nanoparticle catalysts in diverse applications, in particular, oxygen reduction reactions (ORR) at fuel cell cathodes. This review summarizes recent progress in this area of research, where the catalytic performance is evaluated within the context of stabilization of metal nanoparticles against sintering/aggregation and metal-substrate interactions that manipulate the electronic properties of metal nanoparticles and hence the bonding interactions with reaction intermediates. Also discussed are the latest breakthroughs of heteroatom-doped graphene derivatives as effective metal-free catalysts for oxygen reduction. In addition, the review includes a perspective on the development of effective ORR catalysts with a focus on a further understanding of the ORR mechanism as well as on other two-dimensional layered nanostructures such as MoS 2 that have been observed to exhibit electrocatalytic activity for oxygen reduction. Leading mechanistic models are discussed to account for the electrocatalytic activity.

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“…Palladium is also a well‐known catalyst for hydrogenation , a process that shares elementary steps with hydrogen oxidation, making it a candidate anode material in hydrogen fuel cells. Furthermore, appropriately supported and/or alloyed Pd is tolerant toward catalyst‐poisoning impurities in hydrogenation reactions , prompting investigations of its tolerance to carbon monoxide in PEMFCs and sulfur in solid oxide fuel cells (SOFCs) . Yet previous work using benzenethiol (BT) as a model adsorbate showed that low‐aspect ratio Pd nanoparticles are more susceptible to permanent sulfur‐related damage after BT adsorption than similar structures composed of Pt , most likely via the creation of palladium sulfide interphase layers that often form during the dissociative chemisorption of thiols to palladium metal .…”

Section: Introductionmentioning

confidence: 99%

Fabrication of High‐aspect Ratio (HAR) Palladium Nanorod‐modified Electrodes for Raman Spectroelectrochemical Studies of Thiolate Desorption from HAR Nanomaterials

Pomfret

Pietron

2016

Electroanalysis

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We describe a method to fabricate electrodes modified with high‐aspect ratio (HAR) palladium (Pd) nanorods derived from the electrochemical reduction of Pd salts in polycarbonate track‐etched membranes. The HAR Pd nanorod‐modified electrode platform enables direct spectroscopic observation of electrochemical processes particular to HAR forms of nano‐Pd using Raman spectroelectrochemistry. In the present study, we use this platform to observe an anomalous mechanism of oxidative electrochemical desorption of the probe molecule benzenethiol (BT) from the HAR Pd surface. At HAR Pd, the Pd−S bond between the Pd nanorods and BT severs upon oxidation of the Pd surface, whereas on the surface of spherical nano‐Pd, the C−S bond in BT is broken, as is more typically observed for sulfur‐containing organic molecules adsorbed to Pd surfaces. Using this probe reaction, we demonstrate the suitability of this HAR nanorod‐modified electrode platform for the investigation of anomalous electrochemical phenomena observed at HAR Pd for reactions that involve adsorbed intermediates in general – including not only adsorbed sulfur – but in principle also for the electrochemical oxidation of alternative fuels such as ethanol and methanol.

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Mixed-phase Pd–Pt bimetallic alloy on graphene oxide with high activity for electrocatalytic applications

Cited by 56 publications

References 39 publications

Synthesis of Pd and Pt Based Low Cost Bimetallic Anode Electrocatalyst for Glycerol Electrooxidation in Membraneless Air Breathing Microfluidic Fuel Cell

Synthesis of Pd and Pt Based Low Cost Bimetallic Anode Electrocatalyst for Glycerol Electrooxidation in Membraneless Air Breathing Microfluidic Fuel Cell

Multifunctional graphene‐based nanostructures for efficient electrocatalytic reduction of oxygen

Fabrication of High‐aspect Ratio (HAR) Palladium Nanorod‐modified Electrodes for Raman Spectroelectrochemical Studies of Thiolate Desorption from HAR Nanomaterials

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