Rapid synthesis of porous Ni/Co/Fe-LDHs nanosheets for effective electrochemical oxygen evolution reaction and zinc-air batteries

Zheng, Kaiwei; Xu, Jinchang; Ruan, Jiaxi; Li, Xiulan; Yuan, Zhixuan; Yang, Muzi; Chen, Jian; Xie, Fangyan; Jin, Yanshuo; Wang, Nan; Meng, Hua

doi:10.1016/j.ijhydene.2022.06.044

Cited by 12 publications

(8 citation statements)

References 13 publications

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“…For PB‐NSa‐1 h a), the characteristic peaks at 726.1 and 721.3 eV correspond to Fe 2p 1/2 , and the characteristic peaks at 713. and 708.4 eV correspond to Fe 2p 3/2 . [ 33–36 ] The peak at 721.3 and 708.4 eV proves the existence of Fe 2+ , and the characteristic peaks at 726.1 and 713.1 eV prove the existence of Fe 3+ . Similarly, for PB‐NSa‐48 h b), the characteristic peaks of 724.6 and 721.4 eV correspond to Fe 2p 1/2 , and the characteristic peaks of 712.6 and 708.5 eV correspond to Fe 2p 3/2 .…”

Section: Resultsmentioning

confidence: 98%

Interaction Between Prussian Blue Ultrathin Nanosheet and Ammonium Perchlorate for Highly Efficient Thermal Decomposition

Zhou

Ren

Tang

et al. 2023

Adv Funct Materials

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Catalytic stability is the prerequisite for the catalyst to achieve high catalytic efficiency. This study finds a new path that Prussian Blue (PB) ultrathin nanosheet assembly material (PB‐NSa) is designed and used to reach efficient catalysis through continuous interaction with ammonium perchlorate (AP, component to be catalyzed). Based on the strong oxidation environment provided by AP, the decomposition of PB occurs in advance, the product Fe2O3 accelerates the decomposition of AP that can release a large amount of gas, then reacts on Fe2O3 and disperses it near the undecomposed AP, finally realizing continuous and efficient catalysis. The results show that under the catalysis of PB‐N, “deactivation” stage of AP thermal decomposition disappears, showing two consecutive exothermic stages, high temperature decomposition peak of AP is reduced to 341.1 °C, the reduction range is 73.1 °C. Combining kinetic calculation and TG‐IR test, it is found that PB‐NSa can keep excellent catalytic stability, which depends on its special structure and interaction with AP. This research provides a design idea for the material to achieve catalytic stability, which will greatly promote its rapid industrialization.

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Section: Resultsmentioning

confidence: 98%

Interaction Between Prussian Blue Ultrathin Nanosheet and Ammonium Perchlorate for Highly Efficient Thermal Decomposition

Zhou

Ren

Tang

et al. 2023

Adv Funct Materials

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“…Key technical values in ORR include the half-wave potential, onset potential, and cut-off current density, all influenced by factors like electrode and electrolyte materials, as well as pressure and temperature. [58][59][60][61] Selectivity between four-electron and two-electron pathways impacts catalyst efficiency, favoring catalysts promoting efficient oxygen conversion into water for higher energy density.…”

Section: Slow Rate Of Oxygen Reduction/evolution Reactionsmentioning

confidence: 99%

“…[64] Thus, an energy barrier connects OER activity with the difference in binding energies between these oxygen intermediates. [58,59,64] At very low rates, slow electron transfer leads to faster LiO 2 solvation, conversely, high rates and electron density favor surface disproportionation, resulting in formation of films over electrode surface. Kong et al observed random Li 2 O 2 particles on 3D NiFeO cathode at low-current density.…”

Section: Slow Rate Of Oxygen Reduction/evolution Reactionsmentioning

confidence: 99%

Progress and Complexities in Metal–Air Battery Technology

Ramasubramanian,

Dalapati,

Reddy

et al. 2024

Energy Tech

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Metal–air batteries (MABs) offer exceptional energy density, making them attractive for vehicle electrification and storing intermittent renewable energy. However, several challenges persist, including sluggish oxygen reduction and oxygen evolution reactions, interfacial stability issues, and challenges related to current collectors. Herein, the reasons behind MAB's failures are analyzed, considering their thermodynamic aspects (Gibbs free energy, entropy), electrochemical factors (redox potentials, polarization, and ion concentrations), and kinetic properties (mobility of charges). Strategies for mitigating energy barriers of the electrodes are explored, encompassing insights into the initiation process of the oxygen reduction and determinants of oxygen evolution kinetics. The impact of humidity on the electrolyte is assessed, and effective methods for dendrite prevention are elucidated. Additionally, the utilization of 3D electrodes, oxygen‐selective membranes, solid‐state electrolytes, hybrid polymer electrodes, conductive electrocatalysts, and artificial solid‐electrolyte interfaces, and their effects on addressing the challenges faced by MABs are discussed. The study also emphasizes six critical commercialization aspects for the advancement of MABs. Lastly, the potential prospects and challenges in the field of MAB technology are discussed.

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“…LDHs are a kind of particularly promising 2D material and have received considerable attention for their electrocatalytic performance [ 16 , 17 , 18 ]. In particular, LDHs based on transition-metals (Fe, Co, Ni, and Mn) have attracted significant attention due to their superior EOR performance in alkaline media [ 19 , 20 , 21 , 22 , 23 ]. Nevertheless, plenty of the reported LDH-based electrocatalysts are still confronted with shortcomings, such as low surface area, poor conductivity, slow mass transport and electron transfer, etc.…”

Section: Introductionmentioning

confidence: 99%

ZIF-67-Derived NiCo-Layered Double Hydroxide@Carbon Nanotube Architectures with Hollow Nanocage Structures as Enhanced Electrocatalysts for Ethanol Oxidation Reaction

et al. 2023

Molecules

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The rational design of efficient Earth-abundant electrocatalysts for the ethanol oxidation reaction (EOR) is the key to developing direct ethanol fuel cells (DEFCs). Among these, the smart structure is highly demanded for highly efficient and stable non-precious electrocatalysts based on transition metals (such as Ni, Co, and Fe). In this work, high-performance NiCo-layered double hydroxide@carbon nanotube (NiCo-LDH@CNT) architectures with hollow nanocage structures as electrocatalysts for EOR were prepared via sacrificial ZIF-67 templates on CNTs. Comprehensive structural characterizations revealed that the as-synthesized NiCo-LDH@CNTs architecture displayed 3D hollow nanocages of NiCo-LDH and abundant interfacial structure between NiCo-LDH and CNTs, which could not only completely expose active sites by increasing the surface area but also facilitate the electron transfer during the electrocatalytic process, thus, improving EOR activity. Benefiting from the 3D hollow nanocages and interfacial structure fabricated by the sacrificial ZIF-67-templated method, the NiCo-LDH@CNTs-2.5% architecture exhibited enhanced electrocatalytic activity for ethanol oxidation compared to single-component NiCo-LDH, where the peak current density was 11.5 mA·cm-2, and the jf/jb value representing the resistance to catalyst poisoning was 1.72 in an alkaline environment. These results provide a new perspective on the fabrication of non-precious metal electrocatalysts for EOR in DEFCs.

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Rapid synthesis of porous Ni/Co/Fe-LDHs nanosheets for effective electrochemical oxygen evolution reaction and zinc-air batteries

Cited by 12 publications

References 13 publications

Interaction Between Prussian Blue Ultrathin Nanosheet and Ammonium Perchlorate for Highly Efficient Thermal Decomposition

Interaction Between Prussian Blue Ultrathin Nanosheet and Ammonium Perchlorate for Highly Efficient Thermal Decomposition

Progress and Complexities in Metal–Air Battery Technology

ZIF-67-Derived NiCo-Layered Double Hydroxide@Carbon Nanotube Architectures with Hollow Nanocage Structures as Enhanced Electrocatalysts for Ethanol Oxidation Reaction

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