Synthesis–structure–performance correlation for poly-aniline–Me–C non-precious metal cathode based on mesoporous carbon catalysts for oxygen reduction reaction in low temperature fuel cells

Hamzehie, Mohammad Ehsan; Samiee, Leila; Fattahi, Moslem; Seifkordi, Ali Akbar; Shoghi, Fatemeh; Maghsodi, Akram

doi:10.1016/j.renene.2014.12.042

Cited by 14 publications

(7 citation statements)

References 49 publications

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“…An incredibly large number of structures have been formed from various precursors. Several excellent articles have been written on this topic in recent years, − so we do not try to provide any true depth here. However, it can be said that there is now a consensus in the field that FeN 4 centers, with iron as Fe(II), embedded in graphene are the most active sites for the ORR, Figure .…”

Section: Catalysts For the Orrmentioning

confidence: 99%

Catalytic Advantages, Challenges, and Priorities in Alkaline Membrane Fuel Cells

2019

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Recently, anion exchange membrane fuel cells (AEMFCs) have seen a significant growth in research and practical interest as the achievable current density, peak power density, and longevity of state-of-the-art cells have improved dramatically. Though these advances in performance have been important for demonstrating the feasibility of the technology, nearly all AEMFCs reported in the literature have required a relatively high loading of platinum group metal (PGM)-based catalysts at both the anode and cathode electrode to achieve even adequate, let alone exemplary, performance. However, in order to take command of the low-temperature fuel cell market, AEMFCs cannot simply reach the same performance as incumbent proton exchange membrane fuel cells (PEMFCs), which have had decades of development and investment. AEMFCs must be able to realize their most widely quoted advantage over PEMFCs and be produced at a much lower cost than PEMFCs. In the long run, the most likely pathway to acceptably low cost AEMFCs will involve the deployment of PGM-free catalysts at both electrodes. In this Viewpoint, we will discuss what we believe are the most promising approaches to achieve PGM-free catalysts for the oxygen reduction reaction (AEMFC cathode) and hydrogen oxidation reaction (AEMFC anode), as well as provide our perspective on key issues that must be addressed to craft these catalysts into high-performing, durable electrodes.

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Section: Catalysts For the Orrmentioning

confidence: 99%

Catalytic Advantages, Challenges, and Priorities in Alkaline Membrane Fuel Cells

2019

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“…Furthermore, the onset potential values obtained by both catalysts synthesized in this study is 0.2 V lower than that achieved by the commercial Pt/C catalyst, which is 0.8 V. Even though the ORR activity obtained by the commercial Pt/C in this study is lower than the best state of the art of conventional Pt/C catalyst, 45,46 it is comparable with that obtained in the other literatures. 13,16,47…”

Section: Catalytic Activity In An Acidic Mediummentioning

confidence: 99%

Performance of direct formic acid fuel cell using transition metal‐nitrogen‐doped carbon nanotubes as cathode catalysts

et al. 2019

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Summary The application of nonprecious metal catalysts, such as iron (Fe) and cobalt (Co) catalyst, to direct liquid fuel cells (DLFCs), especially in direct methanol fuel cells, has been widely investigated. However, the application of such non‐Pt catalysts as cathode catalysts in direct formic acid fuel cell (DFAFC) operations has not yet been investigated. This study intends to evaluate the formic acid tolerance of such catalysts in case of oxygen reduction reaction. In addition, we investigate their performances in DFAFC using the Fe‐ and Co‐nitrogen‐doped carbon nanotubes (Fe‐NCNT and Co‐NCNT) as the cathode catalysts and compare these performances with the commercial Pt/C catalyst. Herein, Fe‐NCNT and Co‐NCNT were synthesized using the conventional method by the pyrolysis of the multiwalled carbon nanotubes, dicyandiamide, and metal salt under the flow of N2 at 800°C. Both the Fe‐NCNT and Co‐NCNT catalysts exhibit higher formic acid tolerance when compared with that exhibited by the Pt/C catalyst. Further, single‐cell tests with hydrogen‐fed polymer electrolyte fuel cell (PEFC) and DFAFC operations were conducted under various operating conditions to compare the performances of the cells while using the prepared catalysts and the conventional Pt/C catalyst. The PEFC performances in both the Fe‐NCNT and Co‐NCNT catalysts were significantly low (94.9mW cm−2 for Fe‐NCNT and 164.0 mW cm−2 for Co‐NCNT at 60°C). Regardless, the Co‐NCNT catalyst exhibited a maximum power density of 160.7 mW cm−2 in DFAFC operated at 60°C and7‐M formic acid. This value is comparable with that for DFAFC with a Pt/C catalyst (128.9mW cm−2) and is considerably higher than that obtained for other DLFCs while using a non‐Pt catalyst. Therefore, the usage of a non‐Pt metal catalyst as the cathode catalyst is preferable in case of DFAFC.

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“…However, the high cost of these electrocatalysts makes these materials unattractive. To replace these expensive noble catalysts, low cost alternatives such as transition metal oxides have been considered . Among them, cobalt‐based oxides are envisaged as the most active catalysts for the electrocatalysis of oxygen .…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis of Oxygen on Bifunctional Nickel‐Cobaltite Spinel

et al. 2020

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Transition‐metal‐based materials are among the most active and durable catalysts for the effective electrocatalysis of oxygen‐related reactions. Herein, we present a study on bifunctional catalysts as air electrodes aimed at metal‐air batteries based on nickel and cobalt spinel (NiCo2O4) supported on electrospun carbon nanofibers. The physicochemical features of these transition‐metal‐based catalysts are essential for the understanding of their electrochemical activity. Results show that the major presence of oxidized Ni and Co species (Ni3+ and Co3+) produces higher activity for the oxygen evolution reaction (OER), whereas lower oxidation states of the metals (Ni2+, Co2+, Ni0 and Co0) together with the presence of N‐doped carbon lead to enhanced oxygen reduction reaction (ORR) performance. This study highlights the importance of designing catalysts in terms of crystallographic structure and proper oxidation states of the elements for maximizing their performance.

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Synthesis–structure–performance correlation for poly-aniline–Me–C non-precious metal cathode based on mesoporous carbon catalysts for oxygen reduction reaction in low temperature fuel cells

Cited by 14 publications

References 49 publications

Catalytic Advantages, Challenges, and Priorities in Alkaline Membrane Fuel Cells

Catalytic Advantages, Challenges, and Priorities in Alkaline Membrane Fuel Cells

Performance of direct formic acid fuel cell using transition metal‐nitrogen‐doped carbon nanotubes as cathode catalysts

Electrocatalysis of Oxygen on Bifunctional Nickel‐Cobaltite Spinel

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