Operando spectroscopies capturing surface reconstruction and interfacial electronic regulation by FeOOH@Fe2O3@Ni(OH)2 heterostructures for robust oxygen evolution reaction

Tang, Mei; Liu, Xihao; Ali, Asad; He, You-Me; Shen, Peikang; Ouyang, Yifang

doi:10.1016/j.jcis.2023.01.021

Cited by 21 publications

(6 citation statements)

References 60 publications

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“…Based on the comparison of Tafel slope values, it can be concluded that the γ-FeOOH@ Ni(OH) 2 /NF sample has the best performance in terms of the OER, with fast reaction kinetics and low driving overpotentials, and therefore has better catalytic activity. More importantly, the OER catalytic activity of γ-FeOOH@Ni(OH) 2 /NF was also superior to many previously reported nickel-or iron-based nonprecious metal catalysts (Figure 5e and Table S2), for example, at a current density of 100 mA cm −2 for FeOOH/ Co(OH) 2 (265 mV, 38 mV dec −1 ), 25 γ-FeOOH/NF-6 M (316 mV, 51 mV dec −1 ), 22 Co-FeOOH (297 mV, 36 mV dec −1 ), 50 Fe−Mn−O NS/CC (397 mV, 63.9 mV dec −1 ), 51 FeOOH@ Fe 2 O 3 @Ni(OH) 2 (269 mV, 60.2 mV dec −1 ), 52 (Ni 0.7 Fe 0.3 )-C 2 O 4 /NF (243 mV, 43 mV dec −1 ), 53 and so on. To fully evaluate the durability of the γ-FeOOH@Ni(OH)-2/NF catalysts, we designed and implemented a series of experiments.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)₂ Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

Liu,

Wu,

et al. 2024

ACS Sustainable Chem. Eng.

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Transition metal hydroxides have the advantage of high activity and low cost in alkaline electrolytes and are considered one of the most promising catalysts for anodic oxygen evolution reaction (OER). However, single nickel or iron hydroxides is unstable during the reaction process and have a tendency to agglomerate and poor electrical conductivity. Therefore, we designed a kinetically controlled liquid-phase method to synthesize scalable low-crystalline γ-FeOOH@Ni(OH) 2 nanosheet arrays on nickle foam (NF) in an open environment. By adjusting the alkalinity and reaction time, we systematically investigated the formation process and the potential mechanisms related to the structural evolution of γ-FeOOH@Ni(OH) 2 catalysts. γ-FeOOH@Ni(OH) 2 was used as an OER catalyst and showed excellent hydrolytic activity and stability, with a stable operation of more than 320 h at a large current density of 500 mA cm −2 . Density functional theory calculations show that the synergistic effect of γ-FeOOH and Ni(OH) 2 increases the charge accumulation near the Fermi energy level, thus increasing the chance of electron transfer and effectively facilitating the decomposition of water molecules. This work provides a new strategy for the design and exploration of catalysts for achieving large-scale industrialized water decomposition for hydrogen production in an open environment.

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Section: ■ Results and Discussionmentioning

confidence: 99%

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)₂ Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

Liu,

Wu,

et al. 2024

ACS Sustainable Chem. Eng.

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“…The Raman spectrum of ErFeO post-OER (Figure S15b) was similar to that obtained before the OER test, except for a broad peak observed in the range of 510−900 cm −1 . The multiple vibration modes of the new phase of FeOOH at around 540 and 660 cm −1 , 58 along with those of Er 2 O 3 and Fe 2 O 3 , may result in a broad peak in this range. The XRD pattern in Figure S15c of ErFeO after the 30 h long-term durability test showed consistent peaks with those observed before the OER, albeit with slight intensity variations.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Influence of Er₂O₃ Nanoclusters on Transition Metal Oxide Nanostructures in Water Oxidation

Huynh,

Jana,

Chung

et al. 2024

ACS Appl. Nano Mater.

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The search for an effective, stable, and economically viable electrocatalyst for water splitting to replace expensive noble catalysts remains imperative. This investigation evaluates the impact of erbium oxide (Er 2 O 3 ) on the oxygen evolution reaction (OER) activity of transition metal oxides (TMOs), including nickel oxide (NiO), cobalt oxide (Co 3 O 4 ), and iron oxide (Fe 2 O 3 ). Introducing Er 2 O 3 nanoclusters into TMO nanostructures produces a heterostructure interface between Er 2 O 3 and the active TMOs, leveraging Er 2 O 3 's unique 4f electron occupancy as an effective electronic modulator, thus enhancing its electrocatalytic activity. Findings reveal that the Er 2 O 3 and Fe 2 O 3 hybrid (ErFeO) exhibits the most promising OER activity, characterized by low overpotential and Tafel slope, exceptional durability relative to synthesized materials, and outperforming the commercial noble catalyst, RuO 2 . Consequently, ErFeO is a prospective electrocatalyst for OER applications.

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“…[7][8] The basic reactions are the same, even if these devices are constructed differently. [9] The hydrogen evolution reaction (HER) at the cathode electrode and the oxygen evolution reaction (OER) at the anode is involved in a water-splitting device, [10][11][12][13][14] while metal dissolution and deposition take place at the negative (metal) electrode and the oxygen reduction reaction (ORR) and OER at the positive electrodes are involved in a rechargeable metal-air battery. [15] Since OER is the most efficient of the two technologies and involves the formation of oxygenoxygen bonds and four proton-coupled electron transfer processes, it is kinetically slow compared to the other halfreactions.…”

Section: Introductionmentioning

confidence: 99%

Composition‐Dependent NiS‐Enriched FeNi₂S₄/ZnCr₂O₄ Catalyst for Electrochemical Oxygen Evolution Reaction

Begum,

Biswas,

Roy

et al. 2024

ChemistrySelect

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Transition metal sulfide and oxide nanomaterials are gaining popularity as catalysts for electrochemical water splitting because of their cost effectiveness, durability, and stability without using noble metals. Our study focuses on a hybrid electrocatalyst, NiS‐enriched FeNi2S4/ZnCr2O4, which is synthesized in two steps by sol‐gel followed through thermal decomposition in an aqueous solution by a hydrothermal process. We investigated its potential application in the electrochemical oxygen evolution reaction (OER). Powder X‐ray diffraction and X‐ray photoelectron spectroscopy analyses were used to determine the chemical composition and structure. The results showed that the FeNi2S4 structure has an enriched NiS phase. Additionally, the morphology of the synthesized FeNi2S4/ZnCr2O4 was revealed by field emission scanning electron microscopy (FE‐SEM). Under alkaline (1 M KOH) conditions, the FeNi2S4/ZnCr2O4 hybrid nanostructure showed a low overpotential value of 295 mV (Tafel slope, 59 mV dec−1) for OER activities due to the synergistic effects of FeNi2S4 and ZnCr2O4. Furthermore, the hybrid nanostructure demonstrated its long‐term stability and efficiency as an electrocatalyst for OER activities, surpassing previously reported superior electrocatalysts and state‐of‐the‐art materials.

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Operando spectroscopies capturing surface reconstruction and interfacial electronic regulation by FeOOH@Fe2O3@Ni(OH)2 heterostructures for robust oxygen evolution reaction

Cited by 21 publications

References 60 publications

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)₂ Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)₂ Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

Influence of Er₂O₃ Nanoclusters on Transition Metal Oxide Nanostructures in Water Oxidation

Composition‐Dependent NiS‐Enriched FeNi₂S₄/ZnCr₂O₄ Catalyst for Electrochemical Oxygen Evolution Reaction

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Operando spectroscopies capturing surface reconstruction and interfacial electronic regulation by FeOOH@Fe2O3@Ni(OH)2 heterostructures for robust oxygen evolution reaction

Cited by 21 publications

References 60 publications

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)2 Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)2 Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

Influence of Er2O3 Nanoclusters on Transition Metal Oxide Nanostructures in Water Oxidation

Composition‐Dependent NiS‐Enriched FeNi2S4/ZnCr2O4 Catalyst for Electrochemical Oxygen Evolution Reaction

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In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)₂ Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

In-situ Growth of Scalable Low-Crystalline γ-FeOOH@Ni(OH)₂ Nanosheet Heterostructured Catalysts for Stable Oxygen Evolution Reaction at Large Current Density

Influence of Er₂O₃ Nanoclusters on Transition Metal Oxide Nanostructures in Water Oxidation

Composition‐Dependent NiS‐Enriched FeNi₂S₄/ZnCr₂O₄ Catalyst for Electrochemical Oxygen Evolution Reaction