Mn-incorporated nickel selenide: an ultra-active bifunctional electrocatalyst for hydrogen evolution and urea oxidation reactions

Maleki, Meysam; Darband, Ghasem Barati; Rouhaghdam, A. Sabour; Andaveh, Reza; kazemi, Zahra Mohammad

doi:10.1039/d1cc07242k

Cited by 56 publications

(27 citation statements)

References 31 publications

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“…On the other hand, despite the demonstration of good electrocatalytic activity for OER and UOR by the state-of-the-art RuO 2 and IrO 2 electrocatalysts, their commercial implementation is limited by the high cost and scarcity of these noble metal-based compounds [ 36 ]. Recently, various transition metal-based materials, such as sulfides [ 37 , 38 , 39 , 40 ], oxides [ 10 , 41 , 42 ], selenides [ 43 , 44 , 45 ] and metal–organic frameworks (MOFs) [ 11 , 46 ] have been investigated with noteworthy catalytic performance for UOR. However, they hardly fulfill the requirement for practical implementation due to their high overpotential and low current densities [ 23 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Bimetallic Cu/Fe MOF-Based Nanosheet Film via Binder-Free Drop-Casting Route: A Highly Efficient Urea-Electrolysis Catalyst

et al. 2022

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Developing efficient electrocatalysts for urea oxidation reaction (UOR) can be a promising alternative strategy to substitute the sluggish oxygen evolution reaction (OER), thereby producing hydrogen at a lower cell-voltage. Herein, we synthesized a binder-free thin film of ultrathin sheets of bimetallic Cu-Fe-based metal–organic frameworks (Cu/Fe-MOFs) on a nickel foam via a drop-casting route. In addition to the scalable route, the drop-casted film-electrode demonstrates the lower UOR potentials of 1.59, 1.58, 1.54, 1.51, 1.43 and 1.37 V vs. RHE to achieve the current densities of 2500, 2000, 1000, 500, 100 and 10 mA cm−2, respectively. These UOR potentials are relatively lower than that acquired by the pristine Fe-MOF-based film-electrode synthesized via a similar route. For example, at 1.59 V vs. RHE, the Cu/Fe-MOF electrode exhibits a remarkably ultra-high anodic current density of 2500 mA cm—2, while the pristine Fe-MOF electrode exhibits only 949.10 mA cm−2. It is worth noting that the Cu/Fe-MOF electrode at this potential exhibits an OER current density of only 725 mA cm—2, which is far inconsequential as compared to the UOR current densities, implying the profound impact of the bimetallic cores of the MOFs on catalyzing UOR. In addition, the Cu/Fe-MOF electrode also exhibits a long-term electrochemical robustness during UOR.

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Section: Introductionmentioning

confidence: 99%

Bimetallic Cu/Fe MOF-Based Nanosheet Film via Binder-Free Drop-Casting Route: A Highly Efficient Urea-Electrolysis Catalyst

et al. 2022

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“…As presented in Figure d, the | Z | fluctuation is relatively constant for the NiFeSbP electrode, verifying that the surface of the NiFeSbP electrode has more aerophobicity than the pure Ni electrode. The increment in the specific resistance corresponds to the accumulation of H 2 bubbles on the electrode surface, while the sudden decrease in the specific resistance is related to the release of bubbles …”

Section: Resultsmentioning

confidence: 99%

“…22 On the other hand, superior electrochemical performance can be obtained by integrating foreign metallic elements into the host material and formulating their chemical composition and morphology. 23,24 Therefore, the simultaneous incorporation of Fe and Sb into Ni−P can regulate the charge distribution of Ni−P and give rise to conductivity, which, to the best of our knowledge, has not been investigated yet.…”

Section: Introductionmentioning

confidence: 99%

“…Recent advancements have shown that using electronegative P atoms with Ni in the catalyst composition could not only catch positively charged protons in an alkaline medium but also optimize the HER and UOR kinetics on the catalyst by enhancing the electron transfer rate. − Hence, the appropriate atomic ratio of Ni to P could offer excellent electrical conductivity and subsequently inferior electrochemical performance in an alkaline solution . On the other hand, superior electrochemical performance can be obtained by integrating foreign metallic elements into the host material and formulating their chemical composition and morphology. , Therefore, the simultaneous incorporation of Fe and Sb into Ni–P can regulate the charge distribution of Ni–P and give rise to conductivity, which, to the best of our knowledge, has not been investigated yet.…”

Section: Introductionmentioning

confidence: 99%

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Hierarchical Flower-like NiFeSbP Electrocatalyst toward Efficient and Stable Urea-Assisted Electrolytic Hydrogen Production

Gugtapeh

Rezaei

2022

ACS Appl. Energy Mater.

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Designing high-performance electrocatalysts for water splitting and urea-assisted electrolysis is of great significance in the hydrogen production industry. Herein, a hierarchical flower-like NiFeSbP electrocatalyst with different Ni/Fe ratios was fabricated on a graphite bar (GB) through a one-step electrodeposition method. By optimizing and regulating the ratios of Ni and Fe in the composition, the NiFeSbP electrocatalyst exhibited excellent hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and urea oxidation reaction (UOR) activities with overpotentials of 143, 323, and 272 mV at 100 mA·cm–2, sequentially, and also demonstrated longevity for over 100 h in an alkaline solution. More impressively, a symmetrical electrolyzer using NiFeSbP/GB as both the anode and cathode to afford a current density of 10 mA·cm–2 needs 1.72 V for overall water splitting and 1.54 V for urea-assisted electrolysis. The superior catalytic performances of the NiFeSbP/GB catalyst in the urea-added water electrolysis mainly benefit from the synergistic effect between tricomponent metal catalytic centers (Ni, Fe, and Sb) and P atoms, which modulates the chemical and electronic structure of the catalyst. This work opens up new prospects for the rational design of versatile and stable UOR electrocatalysts for hydrogen generation in an efficient manner.

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“…Recently, Maleki et al [ 99 ] reported a highly active and stable bifunctional electrocatalyst of Ni-Mn-Se in NF and displayed overpotentials of 28 and 122 mV at 10 mA cm −2 for the HER and UOR, respectively. Additionally, it showed an overall urea-splitting voltage of 1.352 V at 10 mA cm −2 .…”

Section: Bifunctional Electrocatalysts For the Uor And Hermentioning

confidence: 99%

Recent Development of Nickel-Based Electrocatalysts for Urea Electrolysis in Alkaline Solution

Anuratha

Rinawati

et al. 2022

Nanomaterials

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Recently, urea electrolysis has been regarded as an up-and-coming pathway for the sustainability of hydrogen fuel production according to its far lower theoretical and thermodynamic electrolytic cell potential (0.37 V) compared to water electrolysis (1.23 V) and rectification of urea-rich wastewater pollution. The new era of the “hydrogen energy economy” involving urea electrolysis can efficiently promote the development of a low-carbon future. In recent decades, numerous inexpensive and fruitful nickel-based materials (metallic Ni, Ni-alloys, oxides/hydroxides, chalcogenides, nitrides and phosphides) have been explored as potential energy saving monofunctional and bifunctional electrocatalysts for urea electrolysis in alkaline solution. In this review, we start with a discussion about the basics and fundamentals of urea electrolysis, including the urea oxidation reaction (UOR) and the hydrogen evolution reaction (HER), and then discuss the strategies for designing electrocatalysts for the UOR, HER and both reactions (bifunctional). Next, the catalytic performance, mechanisms and factors including morphology, composition and electrode/electrolyte kinetics for the ameliorated and diminished activity of the various aforementioned nickel-based electrocatalysts for urea electrolysis, including monofunctional (UOR or HER) and bifunctional (UOR and HER) types, are summarized. Lastly, the features of persisting challenges, future prospects and expectations of unravelling the bifunctional electrocatalysts for urea-based energy conversion technologies, including urea electrolysis, urea fuel cells and photoelectrochemical urea splitting, are illuminated.

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Mn-incorporated nickel selenide: an ultra-active bifunctional electrocatalyst for hydrogen evolution and urea oxidation reactions

Abstract: We report Ni-Mn-Se supported on Ni foam as a highly active and stable bifunctional electrocatalyst that exhibits overpotentials of 28 and 122 mV for reaching the current density of 10...

Cited by 56 publications

References 31 publications

Bimetallic Cu/Fe MOF-Based Nanosheet Film via Binder-Free Drop-Casting Route: A Highly Efficient Urea-Electrolysis Catalyst

Bimetallic Cu/Fe MOF-Based Nanosheet Film via Binder-Free Drop-Casting Route: A Highly Efficient Urea-Electrolysis Catalyst

Hierarchical Flower-like NiFeSbP Electrocatalyst toward Efficient and Stable Urea-Assisted Electrolytic Hydrogen Production

Recent Development of Nickel-Based Electrocatalysts for Urea Electrolysis in Alkaline Solution

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