Underpotential deposition of selenium and antimony on gold

Chen, Yuan; Wang, Lishi; Pradel, Annie; Merlen, Alexandre; Ribes, M.; Record, Marie‐Christine

doi:10.1007/s10008-015-2881-0

Cited by 12 publications

(9 citation statements)

References 46 publications

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“…These peaks are associated with Eqs. (5)–

true {normalS normalb normalO}_{((), normala normalq)}^{+} + {2 normalH}_{((), normala normalq)}^{+} + {3 normale}^{-} \vec{\leftarrow} {normalS normalb}_{(normals, 1^{s t} a d a t o m s)} + H_{2} O_{(normall)}

true {normalS normalb normalO}_{((), normala normalq)}^{+} + {2 normalH}_{((), normala normalq)}^{+} + {3 normale}^{-} \vec{\leftarrow} {normalS normalb}_{(normals, 2^{n d} a d a t o m s)} + H_{2} O_{(normall)}

true {normalS normalb normalO}_{((), normala normalq)}^{+} + {2 normalH}_{((), normala normalq)}^{+} + {3 normale}^{-} \vec{\leftarrow} {normalS normalb}_{(normals, b u l k)} + H_{2} O_{(normall)}

…”

Section: Resultssupporting

confidence: 83%

“…From the green line voltammogram of Figure 4A, we can observe a R 1 peak at the same potential of the Se and Sb 1 st adatom UPDs, which means that in this region, the Sb and Se adatoms can react in the solid state to form Sb 2 Se 3 (Equation (8)), as also observed by Chen et al [41] on a gold surface. 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 The presence of this semiconductor Sb 2 Se 3 layer on Pt explains the fact that the bulk Se (C 2 ) deposition dislocates to R 3 and the formation of selenide (C 3 ) shifts to R 4 .…”

Section: Resultssupporting

confidence: 77%

“…From the green line voltammogram of Figure A, we can observe a R 1 peak at the same potential of the Se and Sb 1 st adatom UPDs, which means that in this region, the Sb and Se adatoms can react in the solid state to form Sb 2 Se 3 (Equation (8)), as also observed by Chen et al . on a gold surface.…”

Section: Resultsmentioning

confidence: 70%

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Thermal Treatment Effects on Electrodeposited Sb₂Se₃ Photovoltaic Thin Films

2017

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Antimony selenide thin films were prepared through potentiostatic co‐electrodeposition by applying −0.6 V from a bath composed of 2.5 mM K(SbO)C4H4O6 ⋅ 0.5 H2O and 2.0 mM SeO2 in a supporting electrolyte of 0.5 M Na2SO4/H2SO4 at pH 2. The films were subjected to different thermal treatment (TT) conditions under a Se(vapor)/N2 atmosphere. Cyclic voltammetry was used to evaluate the electrochemical process of each element separately as well as the binary system on Pt and FTO working electrodes. The morphology, composition, band gap, crystallography, and photoactivity toward hydrogen gas production of the films were evaluated as a function of TT conditions, in order to obtain insight into their effects on film properties. Under all conditions, the films showed homogeneous and rough surfaces and a stoichiometric Sb2Se3 composition. The non‐thermal‐treated film was non‐crystalline, whereas after TT, all films showed a pure orthorhombic Sb2Se3 phase. It was observed that the crystallographic texturization of films in the (120) plane, caused by some TT conditions, is detrimental to the photoactivity. At the optimized TT conditions (300 °C for 3 h), the film presented good crystallographic and optoelectronic properties and photoactivity, with a photocurrent value of 168.15 μA cm−2 (at the standard hydrogen gas evolution potential) and a band gap of around 1.1 eV.

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“…These peaks are associated with Eqs. (5)–

true {normalS normalb normalO}_{((), normala normalq)}^{+} + {2 normalH}_{((), normala normalq)}^{+} + {3 normale}^{-} \vec{\leftarrow} {normalS normalb}_{(normals, 1^{s t} a d a t o m s)} + H_{2} O_{(normall)}

true {normalS normalb normalO}_{((), normala normalq)}^{+} + {2 normalH}_{((), normala normalq)}^{+} + {3 normale}^{-} \vec{\leftarrow} {normalS normalb}_{(normals, 2^{n d} a d a t o m s)} + H_{2} O_{(normall)}

true {normalS normalb normalO}_{((), normala normalq)}^{+} + {2 normalH}_{((), normala normalq)}^{+} + {3 normale}^{-} \vec{\leftarrow} {normalS normalb}_{(normals, b u l k)} + H_{2} O_{(normall)}

…”

Section: Resultssupporting

confidence: 83%

Section: Resultssupporting

confidence: 77%

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Thermal Treatment Effects on Electrodeposited Sb₂Se₃ Photovoltaic Thin Films

2017

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“…Therefore, upd of a metal monolayer onto polycrystalline or single-crystal substrates of a foreign metal has been studied intensively. These investigations included various substrates such as Au, Pt, Ag, Cu, Rh, Ru, Pd, and many deposited ions like Ag + [13,14], Cu 2+ [15][16][17][18][19][20][21][22][23][24], Cd 2+ [25], Pb 2+ [26][27][28][29][30], Tl + [31][32][33][34], Cd 2+ [35,36], Hg 2+ [37], Sn 2+ [38,39], Bi 3+ [30,[40][41][42][43][44][45], Ge 4+ [46][47][48], Sb 2+ [49][50][51], and Ni 2+ [52]. The charge corresponding to the upd permits researchers to estimate the amount of deposited metal.…”

Section: The Upd Metalsmentioning

confidence: 99%

Probing the Surface of Noble Metals Electrochemically by Underpotential Deposition of Transition Metals

et al. 2019

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The advances in material science have led to the development of novel and various materials as nanoparticles or thin films. Underpotential deposition (upd) of transition metals appears to be a very sensitive method for probing the surfaces of noble metals, which is a parameter that has an important effect on the activity in heterogeneous catalysis. Underpotential deposition as a surface characterization tool permits researchers to precisely determine the crystallographic orientations of nanoparticles or the real surface area of various surfaces. Among all the work dealing with upd, this review focuses specifically on the main upd systems used to probe surfaces of noble metals in electrocatalysis, from poly‒ and single-crystalline surfaces to nanoparticles. Cuupd is reported as a tool to determine the active surface area of gold‒ and platinum‒based bimetallic electrode materials. Pbupd is the most used system to assess the crystallographic orientations on nanoparticles’ surface. In the case of platinum, Bi and Ge adsorptions are singled out for probing (1 1 1) and (1 0 0) facets, respectively.

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“…Different gold cleaning processes have been reported in preexisting literature including chemical cleaning and electrochemical cleaning. In chemical cleaning, an oxidizing agent is used (a combination of hydrogen peroxide and sulfuric acid) to remove environmental contaminants from the gold surface (Chen, et al, 2015). On the other hand, electrochemical cleaning consists of the application of several oxidation/reduction cycles by voltammetry in an acid medium (Carvalhal, et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Limpieza de electrodos y reproducibilidad de medidas de impedancia eléctrica en células HeLa en solución acuosa

Pinto

Pinzón

Meléndez

et al. 2020

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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La espectroscopia de impedancia eléctrica (EIS) se emplea en el estudio de las propiedades eléctricas de células en suspensión. Para medir las propiedades eléctricas de materiales se utilizan dos (sistema de electrodo bipolar), tres (tripolares) y cuatro (tetrapolares) electrodos, siendo las medidas tetrapolares la mejor opción para minimizar los efectos de polarización de electrodo. Cuando se repiten las medidas de EIS en una misma muestra, se espera obtener espectros similares, sin embargo, en algunas situaciones se encuentran diferencias significativas asociadas con la baja reproducibilidad y repetibilidad. Aquí se utilizaron células HeLa dispersas en solución acuosa para evaluar también el efecto de la limpieza en el funcionamiento de los electrodos de oro. La limpieza de las superficies de los electrodos de oro se hizo por voltamperometría cíclica. Se encontró que la reproducibilidad y la repetibilidad de las medidas de impedancia aumentaba al limpiar los electrodos. Estos resultados evidenciaron que la limpieza de la superficie de los electrodos minimizó las contribuciones de la polarización de los electrodos en las mediciones. Además, se propone un modelo de circuito para describir el efecto de las superficies sin limpiar en las medidas eléctricas. Dicho modelo confirma que el efecto observado no se debió a una impedancia de polarización convencional. Más bien se trató de una polarización activa (como un potencial), la cual se presenta a bajas frecuencias y es independiente de la frecuencia de la señal de excitación.

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Underpotential deposition of selenium and antimony on gold

Cited by 12 publications

References 46 publications

Thermal Treatment Effects on Electrodeposited Sb₂Se₃ Photovoltaic Thin Films

Thermal Treatment Effects on Electrodeposited Sb₂Se₃ Photovoltaic Thin Films

Probing the Surface of Noble Metals Electrochemically by Underpotential Deposition of Transition Metals

Limpieza de electrodos y reproducibilidad de medidas de impedancia eléctrica en células HeLa en solución acuosa

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Underpotential deposition of selenium and antimony on gold

Cited by 12 publications

References 46 publications

Thermal Treatment Effects on Electrodeposited Sb2Se3 Photovoltaic Thin Films

Thermal Treatment Effects on Electrodeposited Sb2Se3 Photovoltaic Thin Films

Probing the Surface of Noble Metals Electrochemically by Underpotential Deposition of Transition Metals

Limpieza de electrodos y reproducibilidad de medidas de impedancia eléctrica en células HeLa en solución acuosa

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Thermal Treatment Effects on Electrodeposited Sb₂Se₃ Photovoltaic Thin Films

Thermal Treatment Effects on Electrodeposited Sb₂Se₃ Photovoltaic Thin Films