Low cost iodine intercalated graphene for fuel cells electrodes

Marinoiu, Adriana; Raceanu, Mircea; Carcadea, Elena; Ștefănescu, Ioan

doi:10.1016/j.apsusc.2017.01.295

Cited by 27 publications

(17 citation statements)

References 30 publications

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“…In the last few years, much attention has been paid to finding new catalyst supports and among these carbon materials, graphene has been considered as an excellent support material. Such a graphene based support has been developed previously by our group [33,[51][52][53] and investigated experimentally [33]. The numerical and experimental results of PEM fuel cell testing using this catalyst layer and a conventional Pt/C catalyst has been compared in the Section 4.1.…”

Section: Specific Surface Area and Carbon Supportmentioning

confidence: 99%

“…An improved support based on nanostructured carbon can be used to replace the usual carbon black supports and graphene is a promising material that can be used due to its unique twodimensional structure and extraordinary properties (high electronic and thermal conductivity, high surface area and high mechanical strength). The research carried out in the last few years by our group [33,[51][52][53] and others [34][35][36] on the use of graphene based materials as catalyst layers for PEM fuel cells have demonstrated that a better performance can be achieved due to an increased electrochemical active area and this is due to more platinum sites being available for oxygen reduction reaction. The performance improvement is also due to the graphene structure which benefits from a large number of vacancies and mesopores that offer new channels for reactant and product transport, and ensures conductive paths for the ions and electrons.…”

Section: Introductionmentioning

confidence: 99%

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Influence of catalyst structure on PEM fuel cell performance – A numerical investigation

Carcadea

Marinoiu

Raceanu

et al. 2019

International Journal of Hydrogen Energy

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The effect of the catalyst microstructure on a 5 cm 2 PEM fuel cell performance is numerically investigated. The catalyst layer composition and properties (i.e. ionomer volume fraction, platinum loading, particle radius, electrochemical active area and carbon support type), and the mass transport resistance due to the ionomer and liquid water surrounding the catalyst particles, are incorporated into the model. The effects of the above parameters are discussed in terms of the polarization curves and the local distributions of the key parameters. An optimum range of the ionomer volume fraction was found and a gain of 39% in the performance was achieved. As regards the platinum loading and catalyst particle radius, the results showed that a higher loading and a smaller radius leads to an increase in the PEMFC performance. Further, the influence of the electrochemical active area produces an overall increase of 22% in current density and this was due to the use of a new material developed as support for Pt particles, an iodine doped graphene, which has better electrical contacts and additional pathways for water removal. Using this parameter, the numerical model has been validated and good agreement with experimental data was achieved, thus giving confidence in the model as a design tool for future improvements of the catalyst structure.

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Section: Specific Surface Area and Carbon Supportmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of catalyst structure on PEM fuel cell performance – A numerical investigation

Carcadea

Marinoiu

Raceanu

et al. 2019

International Journal of Hydrogen Energy

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“…Neutralization of the charge loading of the samples was done in dual mode using an electron gun and another argon ion. Thus, the energy calibration with the C1s line (284.8 eV) was made with great accuracy and allowed to be compared with the data from the established databases as well as from the literature [29,30]. After examination of Table 3 it follows:…”

Section: Morphological and Structural Properties Of I-doped Graphenementioning

confidence: 99%

“…Iodine Doped Graphene for Enhanced Electrocatalytic Oxygen Reduction Reaction in PEM Fuel… http://dx.doi.org/10.5772/intechopen.76495 it has been shown that heteroatom doping can induce redistribution of graft load. In this regard, heteroatom doped graphene such as N, S, P, B have recently demonstrated that they can effectively improve the ORR catalytic activity[26][27][28][29][30]. It has been suggested that the dopant (whether its electronegativity toward carbon is greater (such as N, S) or lower (such as B) could create electronically loaded sites favorable for O 2 adsorption.…”

mentioning

confidence: 99%

Iodine Doped Graphene for Enhanced Electrocatalytic Oxygen Reduction Reaction in PEM Fuel Cell Applications

Marinoiu¹,

Carcadea²,

Raceanu³

et al. 2018

Advances in Hydrogen Generation Technologies

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Although doped graphene based materials have been intensively investigated, as electrocatalysts for oxygen reduction reaction (ORR), there is still a number of challenges to be explored in order to design a highly active, durable, thermodynamically stable and lowcost catalyst with full recognized technological importance. The application of iodinedoped graphene in fuel cells (FC) has been recently examined as innovative nanomaterial for cathode fabrication. Up to date microscopic and spectroscopic techniques have been combined with structural and electrochemical investigations for a compendious characterization of developed ORR catalysts. The unique structure of doped graphenes is ascertained by the presence of mesopores, vacancies and high surface area, and favors the ions/electrons transportation at nanometric scale. The chapter discusses (a) how to use the existing knowledge in respect to synthesized doped graphenes and (b) how to improve the FC by taking into account these materials and have an enhanced electrochemical performance as well as long-term durability.

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“…Currently, platinum‐based catalysts have been served as ORR catalysts, but they are difficult to be widely used due to their high price . Therefore, a nonnoble metal or metal‐free catalyst doped with a hetero atom (eg, N, P, B, S or I) meet the requirements of high thermal stability, good chemical stability, and excellent specific surface area.…”

Section: Introductionmentioning

confidence: 99%

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

et al. 2020

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Summary Transition metal and heteroatom codoped carbon materials have become the most promising materials to replace commercial platinum carbon (Pt / C) catalysts due to their low cost, high stability, and methanol resistance. In this work, iron‐nitrogen and phosphorus codoped carbon nanorod‐layer composites (N, P‐CNL) derived from phosphorus‐doped polyaniline (P‐PANI) by phytic acid (PA) and iron salt were successfully obtained after high‐temperature pyrolysis. As a result, the N, P‐CNL materials exhibited good electrocatalytic performance due to abundant active sites. The N, P‐CNL with 50% mass filling ratio of iron salt (named as N, P‐CNL‐1:1) displayed an enhanced limiting current density of −5.97 mA cm−2 at 1600 rpm and outstanding onset potential (−0.004 V) and oxygen reduction peak potential (−0.144 V). In general, this work can give insights into understanding the mechanism of codoped catalysts and synthesis the catalyst with excellent long‐term stability and resistance to methanol crossover and poisoning better than commercial Pt/C.

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Low cost iodine intercalated graphene for fuel cells electrodes

Cited by 27 publications

References 30 publications

Influence of catalyst structure on PEM fuel cell performance – A numerical investigation

Influence of catalyst structure on PEM fuel cell performance – A numerical investigation

Iodine Doped Graphene for Enhanced Electrocatalytic Oxygen Reduction Reaction in PEM Fuel Cell Applications

High‐performance N, P‐CNL nanocomposites as catalyst for oxygen reduction reaction in fuel cell

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