Insights into the Electrooxidation Mechanism of Formic Acid on Pt Layers on Au Examined by Electrochemical SERS

Jeong, Hwakyeung; Kim, Jong-Won

doi:10.1021/acs.jpcc.6b08611

Cited by 17 publications

(6 citation statements)

References 41 publications

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“…For example, Behm and co-workers demonstrated that CO ads could replace H ads as the capping agent for Pt, and Vanpaemel and co-workers reported that ultrathin Ni films could be deposited onto TiN. The HT method has also been adapted for Pt deposition onto: Ni, star-shaped dendritic Au nanorods, and carbon fiber substrates; , Ir deposition on Au, Pt, and Ni; and for PtCoNi alloy formation . To the best of our knowledge, however, the efficacy of this method has not been tested for ML shell deposition onto nanoparticles (NPs).…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Structural Investigation of AuPt Nanoparticles Synthesized Using a Direct Electrochemical Method

et al. 2018

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In this report, we examine the structure of bimetallic nanomaterials prepared by an electrochemical approach known as hydride-terminated (HT) electrodeposition. It has been shown previously that this method can lead to deposition of a single Pt monolayer on bulk-phase Au surfaces. Specifically, under appropriate electrochemical conditions and using a solution containing PtCl, a monolayer of Pt atoms electrodeposits onto bulk-phase Au immediately followed by a monolayer of H atoms. The H atom capping layer prevents deposition of Pt multilayers. We applied this method to ∼1.6 nm Au nanoparticles (AuNPs) immobilized on an inert electrode surface. In contrast to the well-defined, segregated Au/Pt structure of the bulk-phase surface, we observe that HT electrodeposition leads to the formation of AuPt quasi-random alloy NPs rather than the core@shell structure anticipated from earlier reports relating to deposition onto bulk phases. The results provide a good example of how the phase behavior of macro materials does not always translate to the nano world. A key component of this study was the structure determination of the AuPt NPs, which required a combination of electrochemical methods, electron microscopy, X-ray absorption spectroscopy, and theory (DFT and MD).

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Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Structural Investigation of AuPt Nanoparticles Synthesized Using a Direct Electrochemical Method

et al. 2018

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“…Previous studies have shown that Pt-based catalyst adsorbed CO easily and thus make it poisoned. 10,11 On the contrary, the direct pathway of formic acid oxidation to CO 2 is a preferred pathway on Pd catalyst, which avoids catalyst poisoning. Therefore, Pd is more promising than Pt for formic acid electrocatalytic oxidation.…”

mentioning

confidence: 99%

Kinetic Study of Formic Acid Electrochemical Oxidation on Supported Pd Based Electrocatalysts

Tian

Zhu

et al. 2018

J. Electrochem. Soc.

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Developing high performance catalyst based on Pd/C catalyst is critical in investigating and commercializing direct formic acid fuel cell. The improvement of the electron-transfer rate of novel catalysts could solve the sluggish reaction kinetics of formic acid electro-oxidation reaction in some extent. We have demonstrated that phosphotungstic acid (PWA) modified Pd/C catalyst could improve the electro-oxidation activity toward formic acid. In this paper, the electrochemical oxidation reaction kinetics of PWA modified Pd/C catalyst were studied by cyclic voltammetry (CV), Tafel polarization, electrochemical impedance spectroscopy (EIS) and rotating disc voltammetry (RDV) at different scanning rates and temperatures. The results showed that smaller apparent activation energy, charge transfer resistance and Tafel slope of formic acid electro-oxidation from Pd/PWA-C electrode catalyst was obtained, which indicated better electrocatalytic kinetics by PWA modification. The rate-determining step of formic acid electro-oxidation is diffusion process and reaction paths are different with potential. The larger diffusion coefficients of Pd/PWA-C electrode catalyst was verified by CV, EIS and RDV, respectively. With the help of electrochemical measurements, it is concluded that PWA modified Pd/C catalyst has better electrocatalytic activity and faster kinetic performance for formic acid electro-oxidation.

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“…Pt NPs layered on gold surface has shown enhanced electro-catalytic activity of formic acid oxidation. [103] Likewise, Pt modified gold NPs showed high electro-catalytic activity than pure Pt NPs. [104]…”

Section: Electrochemical Oxidation Of Formic Acidmentioning

confidence: 99%

Platinum Nanoparticles: Synthesis Strategies and Applications

Kumar¹,

Gautam²,

Guleria³

2020

NAT

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Plantinum nanoparticles (Pt NPs) have huge potential as heterogeneous catalyst, chemiresistor coating material, nanomedicine, nanosensor, and electronic components along with various other industrial applications. Physical, chemical as well as biological methods are used for the synthesis of plantinum NPs. Physical methods depend upon the physical phenomenon for Pt NPs synthesis. Chemical methods involve one or other chemical reactions to prepare Pt NPs. Biological methods are preferred over other methods. Among all biological sources, use of plant extracts for Pt NPs synthesis is safe and cost-effective. Pt NPs have application in catalysis, electronics, nanodiagnosis and nanomedicine. Synthesis of diverse Pt NPs using different plant bioresource may be more useful for various in vivo applications in future.

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Insights into the Electrooxidation Mechanism of Formic Acid on Pt Layers on Au Examined by Electrochemical SERS

Cited by 17 publications

References 41 publications

Experimental and Theoretical Structural Investigation of AuPt Nanoparticles Synthesized Using a Direct Electrochemical Method

Experimental and Theoretical Structural Investigation of AuPt Nanoparticles Synthesized Using a Direct Electrochemical Method

Kinetic Study of Formic Acid Electrochemical Oxidation on Supported Pd Based Electrocatalysts

Platinum Nanoparticles: Synthesis Strategies and Applications

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