Electrodeposition of Metals with Hydrogen Evolution

Popov, Konstantin; Djokić, Stojan S.; Nikolić, Nebojša D.; Jović, V.D.

doi:10.1007/978-3-319-26073-0_5

Cited by 4 publications

(7 citation statements)

References 58 publications

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“…In other electrolytes, it has been shown that metal electrodeposits can become porous due to the simultaneous evolution of H 2 bubbles during metal electrodeposition. 37 However, from the SEM images of the electrodeposits generated in this study, there is no significant evidence of high porosity, indicating that the effect of H 2 on the morphology of the electrodeposits is minimal.…”

Section: Resultsmentioning

confidence: 60%

Reversible Electrodeposition of Ni and Cu for Dynamic Windows

Barile

2021

J. Electrochem. Soc.

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Reversible metal electrodeposition is a promising method for constructing dynamic windows with electronically switchable transparency. Through the reduction of lighting, heating, and cooling costs, these windows reduce energy consumption. Here, we design new electrolytes for reversible metal electrodeposition on tin-doped indium oxide electrodes based on the co-electrodeposition of Ni and Cu. We determined that synergistic effects between Ni and Cu facilitate spectroelectrochemical reversibility in contrast to the individual electrodeposition of these metals. The most reversible electrolytes contain chloride to improve electrodeposition kinetics and sulfamate ions to prevent the formation of dendrites. In addition to improving the color neutrality of the electrodeposits, nickel sulfamate in the electrolytes serves as a source of sulfamate ions that is soluble without added acid. After investigating the functions of the different electrolyte components, we then evaluated the performance of 25 cm2 two-electrode Ni-Cu dynamic windows.

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Section: Resultsmentioning

confidence: 60%

Reversible Electrodeposition of Ni and Cu for Dynamic Windows

Barile

2021

J. Electrochem. Soc.

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“…Hydrogen bubbles, which form and adhere temporarily to the surface of the support electrode during the foaming process, serve as a dynamic template for the metal deposition. 37,46 Consequently, highly porous metal deposits are created on the substrate and, in the present case, cover concentrically the interconnected wires of the mesh support (Figure 1b). The formed catalyst/support ensemble is hereafter denoted Cufoam@mesh.…”

Section: ■ Results and Discussionmentioning

confidence: 81%

“… 37 Popov et al have indicated that these effects can lead to a substantial increase in the limiting current for the metal deposition as a mechanistic prerequisite for the actual metal-foaming process. 46 For an estimation of the Nernst diffusion layer thicknesses and corresponding achievable limiting currents, we refer to the discussion of Figure S17 in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Boosting Nitrate to Ammonia Electroconversion through Hydrogen Gas Evolution over Cu-foam@mesh Catalysts

et al. 2023

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The hydrogen evolution reaction (HER) is often considered parasitic to numerous cathodic electro-transformations of high technological interest, including but not limited to metal plating (e.g., for semiconductor processing), the CO2 reduction reaction (CO2RR), the dinitrogen → ammonia conversion (N2RR), and the nitrate reduction reaction (NO3 –RR). Herein, we introduce a porous Cu foam material electrodeposited onto a mesh support through the dynamic hydrogen bubble template method as an efficient catalyst for electrochemical nitrate → ammonia conversion. To take advantage of the intrinsically high surface area of this spongy foam material, effective mass transport of the nitrate reactants from the bulk electrolyte solution into its three-dimensional porous structure is critical. At high reaction rates, NO3 –RR becomes, however, readily mass transport limited because of the slow nitrate diffusion into the three-dimensional porous catalyst. Herein, we demonstrate that the gas-evolving HER can mitigate the depletion of reactants inside the 3D foam catalyst through opening an additional convective nitrate mass transport pathway provided the NO3 –RR becomes already mass transport limited prior to the HER onset. This pathway is achieved through the formation and release of hydrogen bubbles facilitating electrolyte replenishment inside the foam during water/nitrate co-electrolysis. This HER-mediated transport effect “boosts” the effective limiting current of nitrate reduction, as evidenced by potentiostatic electrolyses combined with an operando video inspection of the Cu-foam@mesh catalysts under operating NO3 –RR conditions. Depending on the solution pH and the nitrate concentration, NO3 –RR partial current densities beyond 1 A cm–2 were achieved.

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“…A magnetic stirring was performed to expel bubbles generated from hydrogen evolution reaction and speed up the ionic migration. [45,46] As the plating continued, Co was deposited onto the LIG matrix from the edge to the middle (Figure S2, Supporting Information) due to the higher cathode current concentrated on the margins. [45] The non-uniform current distribution would also cause a thicker Co layer on the margins.…”

Section: Electroplating Co Layer Onto Ligmentioning

confidence: 99%

“…[45,46] As the plating continued, Co was deposited onto the LIG matrix from the edge to the middle (Figure S2, Supporting Information) due to the higher cathode current concentrated on the margins. [45] The non-uniform current distribution would also cause a thicker Co layer on the margins. After 180 s, the sensing area of LIG was completely covered by a grey Co layer (Figure 3a).…”

Section: Electroplating Co Layer Onto Ligmentioning

confidence: 99%

A High‐Performance Phosphate Potentiometric Sensor Based on Cobalt Nanoparticles Electroplated on Hierarchically Porous Laser‐Induced Graphene

Chang,

Tang,

Zou

et al. 2024

Adv Materials Inter

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Phosphate is an important fertilizer in agriculture and electrochemical sensors based on cobalt (Co) are promising for measurement of phosphate. The deposition of Co onto conductive substrates to form a nano/microstructured Co layer with rich active sites is a typical strategy to improve detection performances. However, the widely used substrates show smooth surfaces, which cannot provide extra active sites. Herein, a high‐performance phosphate sensor is fabricated by generating Co nanoparticles (NPs) on a hierarchically porous laser‐induced graphene (LIG) matrix with a large surface area. Specifically, a Co layer is first electroplated on the LIG matrix. Nevertheless, the pores of LIG will be blocked by the dense Co layer so the performances of the fabricated LIG‐Co sensor exhibit limited enhancements. Therefore, a “nearly all etching (NAE)” technique is developed to transform the dense Co layer to dispersive Co NPs and re‐expose the pores of LIG, both increasing the active sites. Compared to the LIG‐Co sensor, the LIG‐Co NP sensor displays overall superiority. The response time, sensitivity, and linearity are enhanced from ≈60 to ≈10 s, from 0.012 to 0.069 V dec−1, and from 0.973 to 0.998, respectively. The LIG‐Co NP sensor also shows a decent anti‐interference capability.

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Electrodeposition of Metals with Hydrogen Evolution

Cited by 4 publications

References 58 publications

Reversible Electrodeposition of Ni and Cu for Dynamic Windows

Reversible Electrodeposition of Ni and Cu for Dynamic Windows

Boosting Nitrate to Ammonia Electroconversion through Hydrogen Gas Evolution over Cu-foam@mesh Catalysts

A High‐Performance Phosphate Potentiometric Sensor Based on Cobalt Nanoparticles Electroplated on Hierarchically Porous Laser‐Induced Graphene

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