3D nickel foams with controlled morphologies for hydrogen evolution reaction in highly alkaline media

Siwek, Katarzyna; Eugénio, S.; Santos, Diogo M.F.; Silva, M.T.; Montemor, M.F.

doi:10.1016/j.ijhydene.2018.11.070

Cited by 80 publications

(41 citation statements)

References 35 publications

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“…Highly efficient electrolytic processes such as hydrogen and oxygen evolution reactions are in high demand for the production of clean energy such as hydrogen fuel. 1−7 Compared to the mature hydrogen evolution reaction (HER) in the acidic medium, 8−10 oxygen evolution reactions (OER) have intrinsic advantages in alkaline media (4OH – → 2H 2 O + O 2 + 4e – ) in terms of easy production of oxygen molecules evolving from the electrocatalysts 11−14 and straightforward assembly of the overall alkaline electrolytic device. 15,16 However, the sluggishness in the reaction kinetics 17,18 usually leads to the unsatisfactory catalytic activity of the electrocatalysts during the overall water splitting process.…”

Section: Introductionmentioning

confidence: 99%

A Simple and Scalable Approach To Remarkably Boost the Overall Water Splitting Activity of Stainless Steel Electrocatalysts

Gao

Xiong

et al. 2019

ACS Omega

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The stainless steel mesh (SSM) has received growing consideration as an electrocatalyst for efficient hydrogen and oxygen evolution reactions. Recently, the application of SSM as an oxygen evolution reaction (OER) electrocatalyst has been more promising, while its hydrogen evolution reaction (HER) catalytic activity is very low, which definitely affects its overall water splitting activity. Herein, a simple chemical bath deposition (CBD) method followed by phosphorization is employed to significantly boost the overall water splitting performance of SSM. The CBD method could allow the voids between the SSM fibers to be filled with Ni and P. Electrocatalytic studies show that the CBD-treated and phosphorized stainless steel (denoted SSM-Ni-P) exhibits an HER overpotential of 149 mV, while the phosphorization-free CBD-treated SSM (denoted as SSM-Ni) delivers an OER overpotential of 223 mV, both at a current density of 10 mA cm–2. An asymmetric alkaline electrolyzer assembled based on the SSM-Ni-P cathode (HER) and SSM-Ni anode (OER) achieved an onset and 10 mA cm–2 current densities at an overall potential of 1.62 V, granting more prospects for the application of inexpensive and highly active electrocatalysts for electrocatalytic water splitting reactions.

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Section: Introductionmentioning

confidence: 99%

A Simple and Scalable Approach To Remarkably Boost the Overall Water Splitting Activity of Stainless Steel Electrocatalysts

Gao

Xiong

et al. 2019

ACS Omega

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“…12 The NF with its advantageous 3D scaffold porous structure has enticed the researches toward substantial material development for various energy and environmental applications. [13][14][15] Nickel-based electrodes namely, Electroformed Nickel Mesh and NF are competitive over the conventional electrodes and had been proven with higher hydrogen production in the MECs. 16,17 Especially, in MEC technology, NF is used as a low cost alternative to precious metals such as platinum, palladium, and so on.…”

Section: Introductionmentioning

confidence: 99%

Enhanced biohydrogen production from sugar industry effluent using nickel oxide and cobalt oxide as cathode nanocatalysts in microbial electrolysis cell

Jayabalan

Mohamed

Matheswaran

et al. 2020

Intl J of Energy Research

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Development of economically viable cathode catalysts with practicability in the treatment of real effluents is one of the strenuous efforts among the multidisciplinary approaches in microbial electrolysis cell (MEC). Treatment of industrial effluents using this technology had resulted in simultaneous energy production in the form of hydrogen along with wastewater treatment, promoting both energy and environmental benefits. In this study, two metal oxides such as, Nickel Oxide (NiO) and Cobalt oxide (Co 3 O 4 ) were employed as the cathode catalyst using sugar industry effluent as the substrate for biohydrogen production in the MEC. The addition of NiO and Co 3 O 4 on nickel foam (NF) has demonstrated better hydrogen evolution performance than the control (uncoated) cathode. Electrochemical characterization of the modified cathodes revealed the improved capability analogous to the current density and hydrogen production rate (HPR) obtained in the experimentation. The best performance was achieved by NiO/NF with the maximum HPR of 3.39 ± 0.03 mmol/L/D, coloumbic efficiency of 58 ± 1.4%, hydrogen recovery of 27 ± 1.8% and COD removal efficiency of 52 ± 1.6% when operated with the applied voltage of 1.0 V. Hence, the potential of metal oxides was demonstrated for the candidature of efficient and economical cathode materials in MECs.

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“…The AWE technology currently operated can be improved by the development of electrode materials with low overpotential [3][4][5][6] or by using alkaline polymer electrolyte membrane separators [1,[7][8][9]. Between the promising non-platinum materials the catalyst based on Ni [10][11][12], NiCo [13,14] or Co [15,16] can be used in alkaline water electrolysis with high efficiency. The application of a sufficiently conductive and stable anion-selective polymer electrolyte membrane enables the design of alkaline polymer electrolyte water electrolysis (APWEL) system similar to proton-exchange membrane (PEM) technology.…”

Section: Introductionmentioning

confidence: 99%

Development and testing of a novel catalyst-coated membrane with platinum-free catalysts for alkaline water electrolysis

Hnát

Plevová

Tufa

et al. 2019

International Journal of Hydrogen Energy

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A stable, non-platinum-catalyst-coated anion-exchange membrane with a promising performance for alkaline water electrolysis as an energy conversion technology is prepared and tested. Hot plate spraying technique is used to deposit electrodes on surface of the anion selective polymer electrolyte membrane in the thicknesses of 35 and 120 m corresponding to the catalyst load of 2.5 and 10 mg cm -2 . The platinum free catalysts based on NiCo2O4 for anode and NiFe2O4 for cathode were used together with anion selective polymer binder in the catalyst/binder ratio equal to 9:1. The performance of the prepared membrane electrode assembly is verified under the conditions of the alkaline water electrolysis using different concentrations of the liquid electrolyte ranging from 1 to 15 wt.% KOH. The electrolyser performance is compared to the cell utilising the catalyst coated Ni foam as electrodes. The prepared membrane-electrode assembly stability at a current load of 250 mA cm -2 is verified by an electrolysis test lasting for 72 hours. Results of the experiments provided indicate a possibility of the significant catalyst loading reduction when compared to the catalyst coated electrode approach.

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3D nickel foams with controlled morphologies for hydrogen evolution reaction in highly alkaline media

Cited by 80 publications

References 35 publications

A Simple and Scalable Approach To Remarkably Boost the Overall Water Splitting Activity of Stainless Steel Electrocatalysts

A Simple and Scalable Approach To Remarkably Boost the Overall Water Splitting Activity of Stainless Steel Electrocatalysts

Enhanced biohydrogen production from sugar industry effluent using nickel oxide and cobalt oxide as cathode nanocatalysts in microbial electrolysis cell

Development and testing of a novel catalyst-coated membrane with platinum-free catalysts for alkaline water electrolysis

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