Bimetallic catalysts as electrocatalytic cathode materials for the oxygen reduction reaction in microbial fuel cell: A review

Zhao, Ke; Shu, Yuanxiang; Li, Fengxiang; Peng, Guosong

doi:10.1016/j.gee.2022.10.007

Cited by 41 publications

(7 citation statements)

References 189 publications

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“…As shown in Figure d, the corresponding electron transfer number of Fe NPs @Fe–N/C is 3.96, which is close to Pt/C ( n = 3.94) and higher than N/C ( n = 2.86) and Fe–N/C ( n = 3.72). Therefore, Fe NPs @Fe–N/C exhibits excellent selectivity for the dominant four-electron pathway, suggesting high energy efficiency and excellent potential for practical energy devices …”

Section: Resultsmentioning

confidence: 99%

Synergizing Single-Atom and Carbon-Encapsulated Nanoparticles of Fe for Efficient Oxygen Reduction and Durable Zn–Air Batteries

Zhang,

Liu,

Kucernak

et al. 2024

ACS Appl. Energy Mater.

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Overcoming the sluggish kinetics of the oxygen reduction reaction (ORR) remains a critical challenge for Zn−air batteries. Fe−N/C catalysts have emerged as promising alternatives to precious Pt-based materials. Herein, we report the design and synthesis of carbon-encapsulated Fe nanoparticles decorated Fe−N/C (denoted as Fe NPs @Fe−N/C) via controlled pyrolysis. The Fe NPs @Fe−N/C catalyst exhibits excellent ORR performance in alkaline media with a half-wave potential (E 1/2 ) of 0.893 V RHE . The strategic integration of carbon-encapsulated Fe nanoparticles substantially improves the catalytic activity of Fe−N/C catalysts. The Fe NPs @Fe−N/C as the Zn−air battery cathode delivers an impressive peak power density of 175.7 mW cm −2 and excellent stability over 500 h, surpassing the Pt/C benchmarks. Density functional theory calculations reveal that the carbon-encapsulated Fe nanoparticles facilitate electron transfer to the catalytic site by modulating the d-band center, thereby boosting the ORR activity. This research paves the way for future design strategies integrating nanoparticles and single atoms for efficient electrocatalysis.

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Section: Resultsmentioning

confidence: 99%

Synergizing Single-Atom and Carbon-Encapsulated Nanoparticles of Fe for Efficient Oxygen Reduction and Durable Zn–Air Batteries

Zhang,

Liu,

Kucernak

et al. 2024

ACS Appl. Energy Mater.

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“…This improvement is demonstrated by DFT calculations, which show that the synergistic effects between bimetals can substantially reduce the reaction activation energy, which achieves the remarkable effect of 1 + 1 > 2 [ 72 ]. Bimetallic catalysts, due to their geometric (or strain) effect [ 73 ], electronic (or ligand) effect [ 74 ], and stabilizing effect [ 75 ], demonstrate excellent ORR activity, a high stability, and economic effectiveness [ 76 ]. Naiwrit Karmodak and colleagues identified single- and double-atom metal dopants from the first row of transition metals loaded on the surface of nitrogen-doped graphene containing defects for ORR using a catalyst calculation screening method ( Figure 7 ) [ 77 ].…”

Section: Performance Improvement Strategymentioning

confidence: 99%

Research Progress on Atomically Dispersed Fe-N-C Catalysts for the Oxygen Reduction Reaction

Lian,

Xu,

Zhou

et al. 2024

Molecules

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The efficiency and performance of proton exchange membrane fuel cells (PEMFCs) are primarily influenced by ORR electrocatalysts. In recent years, atomically dispersed metal–nitrogen–carbon (M-N-C) catalysts have gained significant attention due to their high active center density, high atomic utilization, and high activity. These catalysts are now considered the preferred alternative to traditional noble metal electrocatalysts. The unique properties of M-N-C catalysts are anticipated to enhance the energy conversion efficiency and lower the manufacturing cost of the entire system, thereby facilitating the commercialization and widespread application of fuel cell technology. This article initially delves into the origin of performance and degradation mechanisms of Fe-N-C catalysts from both experimental and theoretical perspectives. Building on this foundation, the focus shifts to strategies aimed at enhancing the activity and durability of atomically dispersed Fe-N-C catalysts. These strategies encompass the use of bimetallic atoms, atomic clusters, heteroatoms (B, S, and P), and morphology regulation to optimize catalytic active sites. This article concludes by detailing the current challenges and future prospects of atomically dispersed Fe-N-C catalysts.

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“…Zhao et al showed that the waste lignin can be valorized through pyrolysis to obtain char with a very high surface area. The obtained biochar was then functionalized with Fe-, Mn-, and Fe-Mn phthalocyanine to produce monometallic and bimetallic M-N-C electrocatalysts with good ORR performance [158].…”

Section: Biowaste As the Most Sustainable Choice For Carbon Electroca...mentioning

confidence: 99%

Addressing Environmental Challenges: The Role of Hydrogen Technologies in a Sustainable Future

Di Nardo,

Calabrese,

Venezia

et al. 2023

Energies

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Energy and environmental issues are of great importance in the present era. The transition to renewable energy sources necessitates technological, political, and behavioral transformations. Hydrogen is a promising solution, and many countries are investing in the hydrogen economy. Global demand for hydrogen is expected to reach 120 million tonnes by 2024. The incorporation of hydrogen for efficient energy transport and storage and its integration into the transport sector are crucial measures. However, to fully develop a hydrogen-based economy, the sustainability and safety of hydrogen in all its applications must be ensured. This work describes and compares different technologies for hydrogen production, storage, and utilization (especially in fuel cell applications), with focus on the research activities under study at SaRAH group of the University of Naples Federico II. More precisely, the focus is on the production of hydrogen from bio-alcohols and its storage in formate solutions produced from renewable sources such as biomass or carbon dioxide. In addition, the use of materials inspired by nature, including biowaste, as feedstock to produce porous electrodes for fuel cell applications is presented. We hope that this review can be useful to stimulate more focused and fruitful research in this area and that it can open new avenues for the development of sustainable hydrogen technologies.

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Bimetallic catalysts as electrocatalytic cathode materials for the oxygen reduction reaction in microbial fuel cell: A review

Cited by 41 publications

References 189 publications

Synergizing Single-Atom and Carbon-Encapsulated Nanoparticles of Fe for Efficient Oxygen Reduction and Durable Zn–Air Batteries

Synergizing Single-Atom and Carbon-Encapsulated Nanoparticles of Fe for Efficient Oxygen Reduction and Durable Zn–Air Batteries

Research Progress on Atomically Dispersed Fe-N-C Catalysts for the Oxygen Reduction Reaction

Addressing Environmental Challenges: The Role of Hydrogen Technologies in a Sustainable Future

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