Nickel and manganese oxide heterostructure nanoparticles supported by carbon nanotube for highly efficient oxygen evolution reaction catalysis

Luo, Liuxiong; Huang, Hanyan; Yang, Yuxuan; Gong, Shen; Li, Yixuan; Wang, Yang; Luo, Wenhui; Li, Zhou

doi:10.1016/j.apsusc.2021.151699

Cited by 20 publications

(8 citation statements)

References 42 publications

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“…The oxidation state could result from the surface oxidation of the nano-alloy particles. The Mn 2p and Ga 3d peak diagrams (Figure 2e,f) show that both elements are present in +3 valence form with peaks of 653.1 and 641.9 eV for Mn 3+ [31,38] and 20.2 and 19.8 eV for Ga 3+ , [39,40] which indicates that the Mn and Ga are present in the form of oxides.…”

Section: Resultsmentioning

confidence: 96%

FeNiCo|MnGaO_x Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

Luo,

Liu,

Chen

et al. 2023

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Driven by the pressing demand for stable energy systems, zinc−air batteries (ZABs) have emerged as crucial energy storage solutions. However, the quest for cost‐effective catalysts to enhance vital oxygen evolution and reduction reactions remains challenging. FeNiCo|MnGaOx heterostructure nanoparticles on carbon nanotubes (CNTs) are synthesized using liquid‐phase reduction and H2 calcination approach. Compared to its component, such FeNiCo|MnGaOx/CNT shows a high synergistic effect, low impedance, and modulated electronic structure, leading to a superior bifunctional catalytic performance with an overpotential of 255 mV at 10 mA cm−2 and half‐wave potential of 0.824 V (ω = 1600 rpm and 0.1 m KOH electrolyte). Moreover, ZABs based on FeNiCo|MnGaOx/CNT demonstrate notable features, including a peak power density of 136.1 mW cm−2, a high specific capacity of 808.3 mAh gZn−1, and outstanding stability throughout >158 h of uninterrupted charge−discharge cycling. Theoretical calculations reveal that the non‐homogeneous interface can introduce more carriers and altered electronic structures to refine intermediate adsorption reactions, especially promoting O* formation, thereby enhancing electrocatalytic performance. This work demonstrates the importance of heterostructure interfacial modulation of electronic structure and enhancement of adsorption capacity in promoting the implementation of OER/ORR, ZABs, and related applications.

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Section: Resultsmentioning

confidence: 96%

FeNiCo|MnGaO_x Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

Luo,

Liu,

Chen

et al. 2023

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“…It should be noted that the NiTe 2 /NF@CuFe catalyst exhibited the lowest Tafel slope of 33 mV dec –1 (Figure c), which is clearly lower than those of NiTe 2 /NF@Cu (149 mV dec –1 ), NiTe 2 /NF@Fe (45 mV dec –1 ), and NiTe 2 /NF (114 mV dec –1 ). The OER activities of most reported electrocatalysts and NiTe 2 /NF@CuFe catalyst at 10 mA cm –2 are shown in Figure d and summarized in Table S2. − Clearly, the NiTe 2 /NF@CuFe catalyst exhibits robust OER activity in 1.0 M KOH.…”

Section: Resultsmentioning

confidence: 99%

Effect of Interfacial Strength and Anchoring in a Highly Efficient NiTe₂/NF@CuFe Oxygen-Evolution Catalyst

Jin

Zheng

Dong

et al. 2022

ACS Sustainable Chem. Eng.

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Morphology and electronic-structure modulation are of widespread interest when designing oxygen-evolution-reaction (OER) electrocatalysts for use in fuel cells. In this study, we prepared a NiTe2/NF@CuFe catalyst using replacement reactions and hydrothermal reduction. NiTe2-nanoparticle morphology was adjusted by the introduction of multiple Fe centers and Cu replacement, which resulted in a NiTe2/NF@CuFe catalyst that exhibited excellent OER performance. The thus-prepared catalyst showed a low overpotential of 228 mV and a Tafel slope of 33 mV dec–1 at 10 mA cm–2 in 1 M KOH as the electrolyte. The catalyst is remarkably stable compared to the reference catalyst during electrocatalytic oxygen evolution over 12 h. Density function theory calculations confirmed that the Cu atoms not only facilitate neighboring charge-transfer processes but also build isolated areas of NiTe2 nanoparticles. Net charges and the electron localization function reveal that the well-distributed doped Fe atoms significantly stabilize the NiTe2 nanoparticles on the surface and improve its electronic activity during the OER process. This work provides an effective concept for the synthesis of highly efficient overall water-splitting electrocatalysts.

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“…A recent study also revealed that the OER performance of Ni x |Mn 1-x O/CNTs electrocatalysts is significantly dependent on the content ratios of Ni and Mn. When the content of Mn element was more than 17%, the overpotential of catalyst increases, i.e., lowering Mn content notably improved the OER activity [74].…”

Section: Electrocatalytic Activity Towards Oermentioning

confidence: 99%

Bimetallic 3D Nickel-Manganese/Titanium Bifunctional Electrocatalysts for Efficient Hydrogen and Oxygen Evolution Reaction in Alkaline and Acidic Media

et al. 2023

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In this work, 3D nickel-manganese (NiMn) bimetallic coatings have been studied as electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline (1.0 M KOH) media and the HER in acidic (0.5 M H2SO4) media. The catalysts have been deposited on a titanium substrate (1 × 1 cm2) using low-cost and facile electrochemical deposition method through a dynamic hydrogen bubble template technique. The electrocatalytic performance of these fabricated catalysts was investigated by using Linear Sweep Voltammetry (LSV) for HER and OER at different temperatures ranging from 25 up to 75 °C and also was characterized by scanning electron microscopy (SEM) and inductively coupled plasma optical emission spectroscopy (ICP-OES). It was found that fabricated NiMn/Ti-5 electrocatalyst with Ni2+/Mn2+ molar ratio of 1:5 exhibits excellent HER activity in alkaline media with overpotential of 127.1 mV to reach current density of 10 mA cm−2. On the contrary, NiMn/Ti-1 electrocatalyst that fabricated with Ni2+/Mn2+ molar proportion of 1:1 and lowest Mn-loading of 13.43 µgcm−2 demonstrates exceptional OER activity with minimum overpotential of 356.3 mV to reach current density of 10 mA cm−2. The current densities increase ca. 1.8–2.2 times with an increase in temperature from 25 °C to 75 °C for both HER and OER investigation. Both catalysts also have exhibited excellent long-term stability for 10 h at constant potentials as well as constant current density of 10 mA cm−2 that assure their robustness and higher durability regarding alkaline water splitting.

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Nickel and manganese oxide heterostructure nanoparticles supported by carbon nanotube for highly efficient oxygen evolution reaction catalysis

Cited by 20 publications

References 42 publications

FeNiCo|MnGaO_x Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

FeNiCo|MnGaO_x Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

Effect of Interfacial Strength and Anchoring in a Highly Efficient NiTe₂/NF@CuFe Oxygen-Evolution Catalyst

Bimetallic 3D Nickel-Manganese/Titanium Bifunctional Electrocatalysts for Efficient Hydrogen and Oxygen Evolution Reaction in Alkaline and Acidic Media

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Nickel and manganese oxide heterostructure nanoparticles supported by carbon nanotube for highly efficient oxygen evolution reaction catalysis

Cited by 20 publications

References 42 publications

FeNiCo|MnGaOx Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

FeNiCo|MnGaOx Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

Effect of Interfacial Strength and Anchoring in a Highly Efficient NiTe2/NF@CuFe Oxygen-Evolution Catalyst

Bimetallic 3D Nickel-Manganese/Titanium Bifunctional Electrocatalysts for Efficient Hydrogen and Oxygen Evolution Reaction in Alkaline and Acidic Media

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FeNiCo|MnGaO_x Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

FeNiCo|MnGaO_x Heterostructure Nanoparticles as Bifunctional Electrocatalyst for Zn−Air Batteries

Effect of Interfacial Strength and Anchoring in a Highly Efficient NiTe₂/NF@CuFe Oxygen-Evolution Catalyst