Electrodeposited Pd/graphene/ZnO/nickel foam electrode for the hydrogen evolution reaction

Wang, Na; Tao, Bairui; Miao, Fengjuan; Zang, Yu

doi:10.1039/c9ra05335b

Cited by 22 publications

(15 citation statements)

References 19 publications

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“…Still, only cubic Pd metal (ICDD PDF# 87-0645) and cubic Ni metal (ICDD PDF# 04-0850), which correspond to the as-deposited Pd and the NF substrate, respectively, can be seen in XRD patterns (Figure 3h). 31 Additionally, XPS measurements (Figure S9) confirmed the presence of Pd, Ni, and O. Overall, these results demonstrate that high-quality anodes were synthesized using a one-step electrodeposition method in a flow cell.…”

Section: ■ Experimental Sectionsupporting

confidence: 54%

“…The presence of oxygen on the surface is evident in EDX elemental mappings and atomic compositions (Table S2), suggesting that some Pd oxides could be formed by exposure to air. Still, only cubic Pd metal (ICDD PDF# 87-0645) and cubic Ni metal (ICDD PDF# 04-0850), which correspond to the as-deposited Pd and the NF substrate, respectively, can be seen in XRD patterns (Figure h) . Additionally, XPS measurements (Figure S9) confirmed the presence of Pd, Ni, and O.…”

Section: Resultsmentioning

confidence: 99%

“…For comparison, bare NF and Pd/C/NF electrodes were also prepared and tested (Figure S1). NiO/ Ni/NF electrodes were prepared by a simple chemical oxidation method using K 2 S 2 O 8 as previously reported by He et al 30 Pd/NF electrodes were prepared by a one-step electrochemical plating method as previously reported by Wang et al 31 A Pd loading of 0.49 ± 0.06 mg•cm −2 was obtained. The electrodes were characterized before and after electrolysis by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS).…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Simultaneous Sulfite Electrolysis and Hydrogen Production Using Ni Foam-Based Three-Dimensional Electrodes

Márquez-Montes

Chávez‐Flores

et al. 2020

Environ. Sci. Technol.

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The electrochemical oxidation of sulfite ions offers encouraging advantages for large-scale hydrogen production, while sulfur dioxide emissions can be effectively used to obtain value-added byproducts. Herein, the performance and stability during sulfite electrolysis under alkaline conditions are evaluated. Nickel foam (NF) substrates were functionalized as the anode and cathode through electrochemical deposition of palladium and chemical oxidation to carry out the sulfite electro-oxidation and hydrogen evolution reactions, respectively. A combined analytical approach in which a robust electrochemical flow cell was coupled to different in situ and ex situ measurements was successfully implemented to monitor the activity and stability during electrolysis. Overall, satisfactory sulfite conversion and hydrogen production efficiencies (>90%) at 10 mA·cm–2 were mainly attributed to the use of NF in three-dimensional electrodes with a large surface area and enhanced mass transfer. Furthermore, stabilization processes associated with electrochemical dissolution and sulfur crossover through the membrane induced specific changes in the chemical and physical properties of the electrodes after electrolysis. This study demonstrates that NF-based electrocatalysts can be incorporated in an efficient electrochemical flow cell system for sulfite electrolysis and hydrogen production, with potential applications at a large scale.

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Section: ■ Experimental Sectionsupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Simultaneous Sulfite Electrolysis and Hydrogen Production Using Ni Foam-Based Three-Dimensional Electrodes

Márquez-Montes

Chávez‐Flores

et al. 2020

Environ. Sci. Technol.

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“…59 The Tafel slope, which can be obtained by linear tting of the data plotted versus log j and voltage under the very low current polarization circumstances, is another parameter for evaluating the intrinsic performance of the electrocatalyst towards the formic acid oxidation. 60,61 Tafel slope analysis can be used to study the catalytic mechanism. As illustrated in Fig.…”

Section: Electrochemical Evaluationmentioning

confidence: 99%

Pronounced effect of yttrium oxide on the activity of Pd/rGO electrocatalyst for formic acid oxidation reaction

et al. 2023

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“…The nanoparticles possess increased active sites, improved electrochemical stability, and relatively high surface area. , Transition metal oxides are crucial materials for energy production and storage owing to their durability, low cost, chemical and thermal stabilities, compatibility with electrolytes, environment-friendly nature, and ease of synthesis . Several studies on metal oxides, such as ZnO, TiO 2 , CuO, NiO, , and MoO 2 , for HER have been reported. Chromium(III) oxide (Cr 2 O 3 ), the most stable oxide of chromium, naturally occurs as eskolaite mineral .…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited Nickel/Chromium(III) Oxide Nanostructure-Modified Pencil Graphite Electrode for Enhanced Electrocatalytic Hydrogen Evolution Reaction Activity

2021

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Electrolysis of water in acidic solutions is typically used in the production of electrocatalytic hydrogen. Herein, we proposed the electrochemical fabrication of the nickel/chromium(III) oxide (Ni/Cr 2 O 3 ) nanostructure-modified pencil graphite electrode (PGE) for use as an electrode in hydrogen evolution reaction (HER) in 0.5 M sulfuric acid solution. The optimal combination of nanostructures was determined based on the highest electrocatalytic performance for HER. After determining the ideal experimental conditions for fabrication of Cr 2 O 3 , Ni nanoparticles were electrochemically deposited on the Cr 2 O 3 nanostructure-modified PGE to prepare a low-cost electrocatalyst. The Ni/Cr 2 O 3 nanostructure-modified PGEs were characterized through X-ray diffraction, X-ray photoelectron spectroscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. Linear sweep voltammetry, Tafel polarization curves, and electrochemical impedance spectroscopy were used for determining H + reduction (Had formation) in acidic solution on modified and unmodified electrode surfaces. This study involves the fabrication of a low-cost, stable, and highly electroactive electrode material for hydrogen production in the electrolysis of water.

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Electrodeposited Pd/graphene/ZnO/nickel foam electrode for the hydrogen evolution reaction

Abstract: Efficient electrocatalysts are crucial to water splitting for renewable energy generation.

Cited by 22 publications

References 19 publications

Simultaneous Sulfite Electrolysis and Hydrogen Production Using Ni Foam-Based Three-Dimensional Electrodes

Simultaneous Sulfite Electrolysis and Hydrogen Production Using Ni Foam-Based Three-Dimensional Electrodes

Pronounced effect of yttrium oxide on the activity of Pd/rGO electrocatalyst for formic acid oxidation reaction

Electrodeposited Nickel/Chromium(III) Oxide Nanostructure-Modified Pencil Graphite Electrode for Enhanced Electrocatalytic Hydrogen Evolution Reaction Activity

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