Electrodeposition of Triangular Pd Rod Nanostructures and Their Electrocatalytic and SERS Activities

Choi, Suhee; Jeong, Hwakyeung; Choi, Kang-Hee; Song, Jianwei; Kim, Jongwon

doi:10.1021/am405601g

Cited by 40 publications

(37 citation statements)

References 36 publications

(52 reference statements)

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“…In addition to chemically synthesised cubic palladium nanoparticles, triangular Pd rods have been prepared by electrochemical deposition [11]. These particles had mostly Pd(111) planes on the surface and also some Pd(100) and displayed a higher electrocatalytic activity towards the ORR and methanol oxidation as compared to polycrystalline Pd surfaces.…”

Section: Introductionmentioning

confidence: 99%

Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions

Erikson

Lüsi

Sarapuu

et al. 2016

Electrochimica Acta

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Please cite this article as: Heiki Erikson, Madis Lüsi, Ave Sarapuu, Kaido Tammeveski, Jose Solla-Gullón, Juan M.Feliu, Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions, Electrochimica Acta http://dx.doi.org/10.1016/j.electacta. 2015.11.125 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions Highlights• Carbon-supported Pd nanocubes of three different size and loading were prepared• The specific activity for oxygen reduction reaction is independent of Pd content• Pd nanocubes possess higher specific activity for ORR than spherical Pd nanoparticles• The ORR on carbon-supported Pd nanocubes proceed mainly via 4-electron pathway• Tafel behaviour of ORR on carbon-supported Pd nanocubes is similar to that of bulk Pd AbstractThe oxygen reduction reaction (ORR) was studied on carbon-supported cubic palladium nanoparticles of different sizes (~30 nm, ~10 nm and ~7 nm). Cetyltrimethylammonium bromide (CTAB) and polyvinylpyrrolidone (PVP) were used as capping agents to prepare the nanocubes and Pd content in the catalyst samples was 20 and 50 wt%. The surface morphology of the prepared materials was studied by transmission electron microscopy (TEM). The catalyst materials were electrochemically characterised by cyclic voltammetry and CO stripping experiments. The rotating disk electrode (RDE) method was employed for ORR studies in 0.5 M H 2 SO 4 and 0.1 M HClO 4 solutions. The ORR results revealed that the specific activity of cubic Pd nanoparticles is higher than that of spherical Pd particles and does not depend on the Pd content in the catalyst, but decreases with decreasing the size of Pd nanocubes. Mass activity of Pd nanocubes increased with decreasing the particle size. The ORR proceeds mainly via 4-electron pathway and the reaction mechanism is similar to that on bulk Pd.

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Section: Introductionmentioning

confidence: 99%

Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions

Erikson

Lüsi

Sarapuu

et al. 2016

Electrochimica Acta

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“…During the electrodeposition process, the electrode potentials applied at substrate electrodes play an important role in determining the electrodeposited metal structures. We showed that different Pd nanostructures were obtained depending on the applied electrodeposition potential, whereas other electrochemical variables, such as precursor concentrations and electrolyte compositions, have little influence on the resulting metal nanostructures .…”

Section: Introductionmentioning

confidence: 96%

Effect of Anionic Electrolytes and Precursor Concentrations on the Electrodeposited Pt Structures

Kim

2016

Electroanalysis

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Electrodeposition of functional metal surfaces has received great attention because of their useful applications. Recently, interesting electrodeposition behavior of Pt at −0.8 V (vs. Ag/AgCl) was reported, where underpotential deposited H (Hupd) layers played a unique role in the electrodeposition. Here, we report the effect of anionic electrolytes and precursor concentrations on the electrochemical deposition behavior of Pt. Depending on these two experimental parameters, two distinct Pt structures, monolayer Pt films and Pt spheres, were electrodeposited at −0.8 V. In addition to the underpotential deposited H (Hupd) layers formed at −0.8 V, the adsorption of Cl− also plays a significant role in determining the electrodeposited Pt structures. When the PtCl42− concentration was low and the Cl− concentration was high enough for the adsorption of PtCl42− to be blocked by the Hupd and Cl− layers, monolayer Pt films were electrodeposited. Otherwise, further electrodeposition of Pt spheres over the monolayer Pt films occurred. The effect of other halide ion adsorption and the controlled growth of Pt spheres during the Pt electrodeposition were also investigated. The electrochemical deposition behavior of Pt demonstrated in this work provides insight into the fabrication of functional Pt surfaces.

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“…And the presence of precursor concentration gradient layer near the electrode surface can significantly influence the growth orientation of metal nanostructures. Many works have been done to prepare metal nanostructures for SERS-active substrates by electrochemical deposition, such as silver nanosheets [17] , triangular Pd rod nanostructures [18] , Au nanoparticles [19] and thin films [20] . On nanoporous gold, Yang et al prepared silver nanoparticles by electroless deposition and observed 10 4 times SERS improvement compared to the as-prepared NPG films, which is attributed to the abundant Raman-active nanogaps constructed adjacent nanoparticles and also by the NPG ligaments and adhered nanoparticles [21] .…”

Section: Introductionmentioning

confidence: 99%

Shape controlled gold nanostructures on de-alloyed nanoporous gold with excellent SERS performance

Xue

Scaglione

Celegato

et al. 2018

Chemical Physics Letters

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In this study, nanoporous gold (NPG) has been prepared by chemical de-alloying the Au based metallic glass precursor, Au 20 Cu 48 Ag 7 Pd 5 Si 20 (at.%), which was rapidly solidified from the melt in the form of ribbons. On the nanoporous gold, shape controlled gold nanostructures were electrodeposited by adjusting the applied potentials and deposition times. Using Rhodamine 6G (R6G) as probe molecule, the surface enhanced Raman scattering (SERS) activities with different Au nanostructures on nanoporous gold were compared. The electrodeposited Au dendritic nanostructures on NPG after 3000s exhibited strongest SERS effect and high reproducibility. Using this best SERS active substrate for melamine sensing, the detection limit of 10-7 M was achieved.

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Electrodeposition of Triangular Pd Rod Nanostructures and Their Electrocatalytic and SERS Activities

Cited by 40 publications

References 36 publications

Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions

Oxygen electroreduction on carbon-supported Pd nanocubes in acid solutions

Effect of Anionic Electrolytes and Precursor Concentrations on the Electrodeposited Pt Structures

Shape controlled gold nanostructures on de-alloyed nanoporous gold with excellent SERS performance

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