Nickel foam and stainless steel mesh as electrocatalysts for hydrogen evolution reaction, oxygen evolution reaction and overall water splitting in alkaline media

Hu, Xiaoyan; Tian, Xue‐Mei; Lin, Ying‐Wu; Wang, Zhonghua

doi:10.1039/c9ra07258f

Cited by 210 publications

(108 citation statements)

References 55 publications

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“…1b) confirmed that the nickel foam has three dimensions structure with many pores and a rough surface. The physical properties produced in this study were very similar to those reported by [9]. Further characterization with XRD (Fig.…”

Section: Pretreatment Of Nickel Foamsupporting

confidence: 86%

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Preparation of nickel manganese oxide modified ni foam for anode catalyst direct urea fuel cell

et al. 2020

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Renewable energy is known as environmentally friendly, such as fuel cells. Nickel is regarded as one of the most promising transition metals to be applied as an electrocatalyst in fuel cell application due to its high catalytic activity. However, the modification of nickel is required to decrease its overpotential. In the present study, the NiMn2O4/Ni-foam was prepared for an anode catalyst in the direct urea fuel cell. The NiMn2O4/Nifoam was synthesized through the hydrothermal method at 180°C for 24 h using Mn(NO3)2.6H2O and Ni(NO3)2.6H2O solutions as the precursors in the presence of urea. During the reaction, Ni foam was placed in the solution to undergo the reaction inside the porous of the Ni-foam. Cyclic voltammetry of the prepared NiMn2O4/Ni-foam electrode in a 2 M KOH solution and 0.33 M urea showed good maximum current density at 206 mA cm-2. Furthermore, the prepared electrode was examined in a direct urea fuel cell with a solution containing 2 M KOH and 0.33 M urea in the anode chamber and a solution containing 2 M H2O2 and 2 M H2SO4 in the anode chamber. A power density of 0.304 mW cm-2 was achieved, indicating the prepared electrode is promising to be developed for a catalyst in a direct urea fuel cell.

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Section: Pretreatment Of Nickel Foamsupporting

confidence: 86%

“…Further characterization with XRD (Fig. 1c) shows that nickel foam observed three diffraction peaks of 2θ, namely 44.5°, 51.9°, and 76.4° on the index (111), (200), and (220), which corresponded to the reference diffraction values of PDF # 04-0850 [9].…”

Section: Pretreatment Of Nickel Foammentioning

confidence: 75%

Preparation of nickel manganese oxide modified ni foam for anode catalyst direct urea fuel cell

et al. 2020

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“…Later it has, however, been shown that the Ni-foam itself contributes to the electrocatalytic activity. [21] The focus of this study is not reducing the overpotential to the minimum value. Instead, we want to gain insights into the effect of grafting on the overpotential by comparing the performance of three distinct Ni and Co brucite-derived layered structures, namely, (i) brucite M(OH) 2 without any interlayer anions, (ii) LDHs with free interlayer anions and (iii) hydroxynitrates with grafted interlayer anions.…”

Section: Resultsmentioning

confidence: 99%

The Effect of Interlayer Anion Grafting on Water Oxidation Electrocatalysis: A Comparative Study of Ni‐ and Co‐Based Brucite‐Type Layered Hydroxides, Layered Double Hydroxides and Hydroxynitrate Salts

Radha

Weiß

Sanjuán

et al. 2021

Chemistry A European J

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The urge for carbon-neutral green energy conversion and storage technologies has invoked the resurgence of interest in applying brucite-type materials as low-cost oxygen evolution reaction (OER) electrocatalysts in basic media. Transition metal layered hydroxides belonging to the brucitetype structure family have been shown to display remarkable electrochemical activity. Recent studies on the earth-abundant Fe 3 + containing mössbauerite and Fe 3 + rich CoÀ Fe layered oxyhydroxide carbonates have suggested that grafted interlayer anions might play a key role in OER catalysis. To probe the effect of such interlayer anion grafting in brucitelike layered hydroxides, we report here a systematic study on the electrocatalytic performance of three distinct Ni and Co brucite-type layered structures, namely, (i) brucite-type M-(OH) 2 without any interlayer anions, (ii) LDHs with free interlayer anions, and (iii) hydroxynitrate salts with grafted interlayer anions. The electrochemical results indeed show that grafting has an evident impact on the electronic structure and the observed OER activity. Ni-and Cohydroxynitrate salts with grafted anions display notably earlier formations of the electrocatalytically active species. Particularly Co-hydroxynitrate salts exhibit lower overpotentials at 10 mA cm À 2 (η = 0.34 V) and medium current densities of 100 mA cm À 2 (η = 0.40 V) compared to the corresponding brucite-type hydroxides and LDH materials.

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“…The influence of anode catalyst price suggests that it would be beneficial for a commercial electrolyser to have an anode catalyst based on abundant metals which could show similar catalytic performance to that of a precious anode catalyst (IrO2-based). Potential alternatives to IrO2-based anode catalyst could nickel-based 82,83 anodes.…”

Section: Developing Lower Cost Anode Catalysts and Anion Exchange Membranesmentioning

confidence: 99%

Is maximising current density always the optimum strategy in electrolyser design for electrochemical CO2 conversion to chemicals?

Garg

Idros

et al. 2021

Preprint

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Electrochemical conversion of CO2 to chemicals and fuels can potentially play a role in reducing CO2 emissions from industrial processes and providing non-fossil fuel routes to important chemical feedstocks. Most of the recent research on electrocatalysts for CO2 reduction (CO2R) focuses on achieving maximum selectivity for desired products at the highest possible current density. This approach assumes that maximising current density leads to the lowest cost of CO2R (e.g. $·kg-1 CO2 converted) because it requires the lowest catalyst loadings and electrode area per kg of CO2 treated and thus minimising the electrolyser equipment cost. Using a techno-economic analysis (TEA) model with experimental data from a two-cell vapor fed electrolyser, we show this assumption is not valid for CO2 conversion to CO if the process model accounts for relationships between current density, selectivity, cell voltage, ohmic losses, and product separation costs. Instead, our model predicts the lowest CO production costs at current densities from 500 – 700 A·m-2. At current densities above 1000 A·m-2, growing ohmic losses in the electrolyser lead to increasing power costs that become much larger than any capital savings related to reduced electrode area at the higher current density. Further, we investigate different opportunities that could bring down the CO production cost, however, in all the cases, the lowest CO production cost was found at current densities between 600 – 1400 A·m-2. This work also provides insights that can help identify feasible design spaces for both catalysts and electrolysers to develop CO2 conversion technologies that could soon compete on a cost basis with the natural reforming technologies to produce CO (0.60 $·kg-1 market price).

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Nickel foam and stainless steel mesh as electrocatalysts for hydrogen evolution reaction, oxygen evolution reaction and overall water splitting in alkaline media

Abstract: Efficient electrocatalytic overall water splitting is achieved with commercially-available and low-cost nickel foam and stainless steel mesh as cathode and anode electrodes.

Cited by 210 publications

References 55 publications

Preparation of nickel manganese oxide modified ni foam for anode catalyst direct urea fuel cell

Preparation of nickel manganese oxide modified ni foam for anode catalyst direct urea fuel cell

The Effect of Interlayer Anion Grafting on Water Oxidation Electrocatalysis: A Comparative Study of Ni‐ and Co‐Based Brucite‐Type Layered Hydroxides, Layered Double Hydroxides and Hydroxynitrate Salts

Is maximising current density always the optimum strategy in electrolyser design for electrochemical CO2 conversion to chemicals?

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