Development of Carbon Nanofibers/Pt Nanocomposites for Fuel Cell Application

Mudi, K. Y.; Abdulkareem, A. S.; Kovo, A. S.; Azeez, O. S.; Tijani, Jimoh Oladejo; Eterigho, Elizabeth Jumoke

doi:10.1007/s13369-020-04498-3

Cited by 6 publications

(2 citation statements)

References 33 publications

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“…In this context, W. Li et al explained the relationship between the CNFs’ diameter and the permissible Pt particle size and maximum admissible Pt loading. CNFs are tubular structures with a diameter ranging from a few hundred to less than one micron. − In general, large diameter CNFs offer a reduced surface area for Pt nanoparticles deposition. It was established in this study that if the CNFs diameter is 200 nm, it can only host a maximum of 28 wt% of Pt nanoparticles, whereas CNFs with a diameter of 25 nm can host about 85 wt% of Pt nanoparticles.…”

Section: Pt-supported Nanofiber Catalysts For Oxygen Reduction Reactionmentioning

confidence: 99%

Carbon Nanofibers as Potential Catalyst Support for Fuel Cell Cathodes: A Review

et al. 2021

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Polymer electrolyte membrane fuel cells (PEMFCs) are a fast growing next-generation energy conversion technology, which hold promising interest for transportation and other applications. Nevertheless, successful commercialization of PEMFCs has been significantly retarded principally due to the high cost and poor durability of Pt/C catalysts used for anodic and cathodic reactions. Under typical fuel cell operating conditions, a traditional Pt/C catalyst is prone to degrade by various mechanisms, such as electrochemical carbon corrosion, which results in detrimental effects on the long-term performance. There have been tremendous efforts undertaken to develop durable carbon supports by introducing graphitic carbon components. In this context, carbon nanofiber supported catalysts have been investigated as highly durable supports for Pt and non-Pt nanoparticles in recent years. We anticipate it is timely to review the developments in this topic. This Review highlights the current progress on the graphitic nanofibers as a catalyst support in terms of morphology, electrocatalytic activity, various functionalization strategies, and so on, specifically focusing on the effect of nanofiber edge carbons and the advantages of surface reconstruction of nanofiber edge carbon into loops with regard to the stability of carbon support and fuel cell performance. We believe this Review stands as a guide for future researchers to figure out a rational design of oxygen reduction reaction catalysts, especially dealing with highly graphitized carbons.

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Section: Pt-supported Nanofiber Catalysts For Oxygen Reduction Reactionmentioning

confidence: 99%

Carbon Nanofibers as Potential Catalyst Support for Fuel Cell Cathodes: A Review

et al. 2021

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“…Carbon materials, namely carbon nanotubes (CNT), carbon nanofibers (CNF), graphene, and graphitic carbon nanofiber (GNF) are extensively explored as potential support material owing to their structural benefits, high graphitic nature, and adequate surface area with high mechanical properties. − Among GNFs bearing adequate porous fibrous structures, filamentary micropatterned frameworks, exposed inclines, carrier mobility, and arrangement of graphene platelets to the base-axis tends to create an extremely active ORR catalytic site and thus they are considered as an excellent support material when designing any cathode catalyst. − Recently, S. Akula et al reported on GNFs and heteroatom engineering and described several types of GNFs with crystallographic alignment and morphology, viz., linear platelet, antler, cylindrical, and herringbone types, which starts a new era in developing potential corrosion resistant support material. − The two-dimensional (2D) fish skeleton herringbone type structure of GNF (GNF-H) facilitates a way out for the detailed study owing to its greater electrochemical behavior as compared to other structural orientations. , Furthermore, introduction of hetero elements (such as N, B, S, P, F, etc.) on graphitic surface reports higher spin density and charge density as it brings on numerous defects and electronic charge distribution in the particle, further enhancing its catalytic activity. − Moreover, boron doping takes much attention on account of its smaller atomic size and closed electronegativity with carbon and thus lowers energy barrier between them. − Many researchers’ showed an interest in doping of boron on graphitic nanostructures and investigating it both experimentally and theoretically.…”

Section: Introductionmentioning

confidence: 99%

Co-, Ni-Catalyzed Borylation of Carbon Nanofibers for Oxygen Reduction Reaction in an Anion Exchange Membrane Fuel Cell

Das

Kesh

Akula

et al. 2022

ACS Appl. Energy Mater.

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In an attempt to develop nonprecious metal electrocatalyst, herein, we report borylation of graphitic carbon nanofiber (GNF) and codoping of Co, Ni toward a oxygen reduction reaction (ORR) catalyst and their application in anion exchange membrane fuel cells (AEMFCs). Boron (B) doping in a carbon matrix creates a C–B bond with lower bond energy to facilitate insertion of metal atoms in the carbon matrix beneficial for ORR activity. Ni and Co doping individually and in combination with the B/GNF increases positive charge clouds surrounding metal centers and facilitates O2 adsorption and catalytic activity. The DFT studies on the catalysts are extensively carried out to measure the band gaps, atomic compositions of frontier molecular orbitals, and charge clouds distribution on the catalysts and correlated with the electrochemical findings. Further, Ni and Co doping creates positive charge cloud, facilitating O2 adsorption through lowering the band gap. Synergistic effect of Ni and Co in the catalyst (Ni20Co20@B/GNF-H) toward ORR activity is clearly established and later demonstrated in an anion exchange membrane fuel cells (AEMFCs) as a potential cathode catalyst. Ni20Co20@B/GNF-H showed an eminent ORR activity, competent CH3OH tolerance in alkaline medium without much decrease in ORR activity even after 10,000 potential cycles. Assessing the fuel cell performance evaluation in AEMFC, Ni20Co20@B/GNF-H catalyst, delivers a peak power density of ∼70 mW cm–2 at a load current density of ∼138 mA cm–2 under ambient pressure and temperature. This nonprecious boron-functionalized GNF-H catalyst opens an era toward the development of a low cost, highly efficient metal based cathodic ORR electrocatalyst for AEMFC applications.

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Carbon Nanotube–Based Membranes for Proton Exchange Membrane Fuel Cells

Fegade¹,

Suryawanshi²

2023

Proton Exchange Membrane Fuel Cells

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Development of Carbon Nanofibers/Pt Nanocomposites for Fuel Cell Application

Cited by 6 publications

References 33 publications

Carbon Nanofibers as Potential Catalyst Support for Fuel Cell Cathodes: A Review

Carbon Nanofibers as Potential Catalyst Support for Fuel Cell Cathodes: A Review

Co-, Ni-Catalyzed Borylation of Carbon Nanofibers for Oxygen Reduction Reaction in an Anion Exchange Membrane Fuel Cell

Carbon Nanotube–Based Membranes for Proton Exchange Membrane Fuel Cells

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