State-of-the-art and developmental trends in platinum group metal-free cathode catalyst for anion exchange membrane fuel cell (AEMFC)

Hossen, Mosaddek; Hasan, Md. Shamim; Sardar, Md. Riajul Islam; Haider, Jahid Bin; Mottakin,; Kisand, Vambola; Atanassov, Plamen

doi:10.1016/j.apcatb.2022.121733

Cited by 88 publications

(53 citation statements)

References 473 publications

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“…Compared with the proton-exchange membrane fuel cells (PEMFCs) which rely on the extensive use of PGMs 9 , anion-exchange membrane fuel cells (AEMFCs) and aqueous Zn–air batteries (ZABs) have received increasing attention for their potentials of using earth-abundant non-PGM materials as the catalysts 10 – 13 . Given the high-loading PGM catalysts are still required for competitive output in the state-of-the-art AEMFC and ZABs 14 , it is necessary to develop efficient and durable non-PGM ORR electrocatalysts 15 , 16 . Due to the intrinsically sluggish kinetics of non-PGM ORR electrocatalysts compared to PGM ones, constructing high-density accessible active sites is thus indispensable for their use at the device level although it is still challenging.…”

Section: Introductionmentioning

confidence: 99%

Interfacial assembly of binary atomic metal-Nx sites for high-performance energy devices

Jiang

Liu

et al. 2023

Nat Commun

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Anion-exchange membrane fuel cells and Zn–air batteries based on non-Pt group metal catalysts typically suffer from sluggish cathodic oxygen reduction. Designing advanced catalyst architectures to improve the catalyst’s oxygen reduction activity and boosting the accessible site density by increasing metal loading and site utilization are potential ways to achieve high device performances. Herein, we report an interfacial assembly strategy to achieve binary single-atomic Fe/Co-Nx with high mass loadings through constructing a nanocage structure and concentrating high-density accessible binary single-atomic Fe/Co–Nx sites in a porous shell. The prepared FeCo-NCH features metal loading with a single-atomic distribution as high as 7.9 wt% and an accessible site density of around 7.6 × 1019 sites g−1, surpassing most reported M–Nx catalysts. In anion exchange membrane fuel cells and zinc–air batteries, the FeCo-NCH material delivers peak power densities of 569.0 or 414.5 mW cm−2, 3.4 or 2.8 times higher than control devices assembled with FeCo-NC. These results suggest that the present strategy for promoting catalytic site utilization offers new possibilities for exploring efficient low-cost electrocatalysts to boost the performance of various energy devices.

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Section: Introductionmentioning

confidence: 99%

Interfacial assembly of binary atomic metal-Nx sites for high-performance energy devices

Jiang

Liu

et al. 2023

Nat Commun

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“…Transition metal-nitrogen-carbon (MÀ NÀ C) materials have been identified as one of the most promising alternatives for the oxygen reduction reaction at the cathode side of AEMFCs. [17][18][19][20][21][22] Among these materials, an up-and-coming class is FeÀ NÀ Cbased catalysts, consisting of a carbon (C) matrix doped with nitrogen (N) heteroatoms and Fe. [23][24][25] FeÀ N x À C moieties are primary active sites for oxygen reduction reaction (ORR) and have shown high catalytic activity, comparable to commercial Pt/C, representing the state-of-the-art.…”

Section: Introductionmentioning

confidence: 99%

“…Many research efforts have been devoted to developing PGM‐free catalysts. Transition metal‐nitrogen‐carbon (M−N−C) materials have been identified as one of the most promising alternatives for the oxygen reduction reaction at the cathode side of AEMFCs [17–22] …”

Section: Introductionmentioning

confidence: 99%

Porous Iron‐Nitrogen‐Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC)

et al. 2023

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High-performance platinum group metal-free (PGM-free) electrocatalysts were prepared from porous organic polymers (POPs) precursors with highly-porous structures and adjustable surface area. A resin phenol-melamine-based POP and an iron salt were used to synthesize FeÀ NÀ C catalysts with different iron contents (0.2-1.3 wt.%). Electrochemical and spectroscopical characterization allowed us to elucidate the effect of Fe content on the material's structure, surface chemistry, and electrocatalytic activity toward the oxygen reduction reaction (ORR). The increase of iron content led to a specific surface area decrease, preserving the morphological structure, with the formation of highly-active catalytic sites, as indicated by X-ray photoelectron spectroscopy (XPS) analysis. The rotating ring disk electrode experiments, performed at pH = 13, confirmed the high ORR activity of both 0.5 Fe (E 1/2 = 0.84 V) and 1.3 Fe (E 1/2 = 0.83 V) catalysts, which were assembled at the cathode of a H 2 -fed anion exchange membrane fuel cells (AEMFC) equipped with a FAA-3-50 membrane, evidencing promising performance (0.5 Fe, maximum power density, Max PD = 69 mA cm À 2 and 1.3 Fe, Max PD = 87 mA cm À 2 ) with further advancement prospects.

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“…6,7 Therefore, high-efficiency earth-abundant electrocatalysts are eagerly awaited. 8,9 In the past decade, non-noble metal single-atom catalysts (SACs) with typical metal-nitrogen coordinate sites (M-N-C) have gained great attention due to their outstanding catalytic activity. [10][11][12][13] Recent studies reveal that neighboring metal pairs as reactive sites usually perform better than isolated active sites due to the created synergy.…”

Section: Introductionmentioning

confidence: 99%

Precise and scalable fabrication of metal pair-site catalysts enabled by intramolecular integrated donor atoms

et al. 2022

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State-of-the-art and developmental trends in platinum group metal-free cathode catalyst for anion exchange membrane fuel cell (AEMFC)

Cited by 88 publications

References 473 publications

Interfacial assembly of binary atomic metal-Nx sites for high-performance energy devices

Interfacial assembly of binary atomic metal-Nx sites for high-performance energy devices

Porous Iron‐Nitrogen‐Carbon Electrocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC)

Precise and scalable fabrication of metal pair-site catalysts enabled by intramolecular integrated donor atoms

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