Perovskite cathodes for NaBH 4 /H 2 O 2 direct fuel cells

Santos, Diogo M.F.; Gomes, T.F.B.; Šljukić, Biljana; Sousa, Nuno; Sequeira, C. A. C.; Figueiredo, Filipe M.

doi:10.1016/j.electacta.2015.07.145

Cited by 25 publications

(6 citation statements)

References 47 publications

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“…Nevertheless, the commercialization of DBFC/H 2 O 2 is still limited by the use of costly noble-metal-based electrode materials as catalysts. − One efficient approach to solving these drawbacks is developing a low-cost and highly active anode catalyst. Recent studies have indicated that the BOR on Pd-based catalysts is faster than that on Pt and also has a lower onset potential compared with Au .…”

Section: Introductionmentioning

confidence: 99%

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Hosseini

Daneshvari-Esfahlan

Wolf

et al. 2021

ACS Appl. Energy Mater.

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Bimetallic Pd−X (X = Ni, Co) nanoparticles on nitrogen-doped reduced graphene oxide (N-rGO) are fabricated through a thermal solid-state technique followed by polyol reduction to be used as anode electrocatalysts for direct sodium borohydride−hydrogen peroxide fuel cells. The physical characterization of synthesized materials is investigated using Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The results confirm the uniform distribution of nanoparticles on nitrogen-doped reduced graphene oxide with a size of 11−13 nm. The electrochemical half-cell tests are used to study their electrocatalytic properties toward borohydride oxidation in an alkaline solution. Although perfect performance is observed for both catalysts, Pd−Ni/N-rGO indicates a higher current density, better stability, more negative onset potential, lower activation energy, and smaller charge-transfer resistance than the other. Kinetic studies suggest a first-order reaction with 6.83 and 6.06 electrons exchanged during the borohydride oxidation reaction for Pd−Ni/N-rGO and Pd−Co/N-rGO electrocatalysts, respectively. Finally, a direct sodium borohydride−hydrogen peroxide fuel cell is assembled using Pt/C as a cathode and Pd−X (X = Ni, Co)/N-rGO as an anode. Maximum power density values of 353.84 and 275.35 mW cm −2 at 60 °C are obtained for Pd−Ni/N-rGO and Pd−Co/N-rGO, respectively.

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Section: Introductionmentioning

confidence: 99%

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Hosseini

Daneshvari-Esfahlan

Wolf

et al. 2021

ACS Appl. Energy Mater.

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“…These materials exhibited good catalytic stability, but poor HPRR activity. 110,111 Research on entirely non-nonprecious metal catalysts has been severely hampered and stalled for years. Recently, Ko et al 107 reported a new development.…”

Section: Cathode Catalystsmentioning

confidence: 99%

Research progress on direct borohydride fuel cells

Liu,

Zhang,

Zhao

et al. 2024

Chem. Commun.

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“…submarines [33,48]. Acid-stable Au or Au-based catalysts [33] and Pt/C [48] are the norm, and more complex chemistries of catalysts were also evaluated, like Pt-rare Earths (quite active) [49] and perovskites (poorly-performing) [50]. Proper engineering the cathode catalyst layer and balance-of-plant of the H2O2-DBFC is critical to achieve good H2O2-DBFC performance [32].…”

Section: Hydrogen Peroxide Reduction Reaction (Hprr)mentioning

confidence: 99%

Direct borohydride fuel cells: A selected review of their reaction mechanisms, electrocatalysts, and influence of operating parameters on their performance

Oshchepkov

Bonnefont

Maranzana

et al. 2022

Current Opinion in Electrochemistry

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Direct borohydride fuel cells (DBFC) oxidize an easily-stored energy-dense borohydride fuel (sodium borohydride: NaBH4), that in theory reacts ca. 400 mV below H2 and produce 8 electrons per BH4anion. However, the borohydride oxidation reaction (BOR) does not fully meet these promises in practice: the electrocatalyst nature, structure and state-of-surface, and the operating conditions (pH, BH4concentration, temperature, fluxes) noticeably influence the BOR kinetics and mechanism. Nickel and platinum-based catalysts both have assets for the BOR. DBFCs can only yield decent performance if their separator combines high ionconductivity and efficient separation of the reactants; cation-exchange membranes, anionexchange membranes, bipolar membranes and porous separators all have their own advantages and drawbacks. Besides the anode, the choice of separator must consider the DBFC cathode reaction, where oxygen (air) or hydrogen peroxide are reduced, provided adapted catalysts are used. All these aspects drive the DBFC performance and stability/durability.

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Perovskite cathodes for NaBH 4 /H 2 O 2 direct fuel cells

Cited by 25 publications

References 47 publications

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Novel Bimetallic Pd–X (X = Ni, Co) Nanoparticles Assembled on N-Doped Reduced Graphene Oxide as an Anode Catalyst for Highly Efficient Direct Sodium Borohydride–Hydrogen Peroxide Fuel Cells

Research progress on direct borohydride fuel cells

Direct borohydride fuel cells: A selected review of their reaction mechanisms, electrocatalysts, and influence of operating parameters on their performance

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