A new application of nickel-boron amorphous alloy nanoparticles: anode-catalyzed direct borohydride fuel cell

Li, Sai; Shu, Chengyong; Chen, Yuanzhen; Wang, Lina

doi:10.1007/s11581-017-2180-0

Cited by 23 publications

(16 citation statements)

References 37 publications

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“…on confirmed these findings172 : Ni fails to completely valorize the BH4fuel and leads to nonnegligible hydrogen escape173 in the course of the BOR.Based on this statement, there have been multiple studies exploring Ni-based (sometimes nanostructured) catalysts for the BOR. Many focused on alloying Ni with other metals, like lanthanum in hydrogen storage alloys,174,175 boron,176 cobalt,177,178 coper, 179 cerium 180 or other rare Earths,181 …”

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confidence: 99%

Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

et al. 2020

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Nickel is a very abundant transition metal in the Earth crust, and finds numerous applications in electrochemical processes where metallic Ni or its oxides are thermodynamically stable, particularly in alkaline environments. This contribution addresses electrocatalytic properties of Ni-based catalysts in reactions of fuel oxidation in alkaline media. It firstly details the electrochemical behavior of Ni in alkaline media and approaches to determine the active surface area of Ni electrodes. Secondly, the electrocatalytic activities of Ni-based electrocatalysts for the alkaline hydrogen oxidation reaction are described (an endeavor for the development of anion exchange membrane fuel cells), along with a detailed analysis of the strategies put forward to improve them. It is notably shown that the state of Ni surface (oxidized or reduced) largely determines its electrocatalytic activity. This state of the surface also conveys a pivotal importance regarding the activity of Ni for the oxidation of complex fuels (borohydride, boranes and hydrazine). Finally, emphasis is made on the durability of Ni-based catalysts in alkaline environments. It is shown that in such media, the materials durability of Ni-based electrodes can be high, but this does not necessarily warrant stable electrocatalytic activity, owing to possible deactivation following surface oxide or bulk hydride formation in operation.

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Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

et al. 2020

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“…Anode catalyst erosion from their substrate is often mentioned as one cause of DBFC instability [59]; cathode catalyst dissolution and re-deposition at the anode, and detachment of carbon-supported nanoparticles after DBFC operation are additional explanation for the instability of PGM-based DBFCs upon prolonged operation [51]. Non-PGM Co-Ni-B [60] and NiB [61] BOR anode catalyst were found rather active/stable in prolonged DBFC operation.…”

Section: Stability Of Dbfc Performance and Durability Of Dbfc Catalystsmentioning

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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“…Note that Ni-based materials have been investigated for a long time as catalysts for the BOR. However, the performance data reported in the literature were very contradictory, varying from very poor [34][35][36] to rather promising in terms of the onset potential and the current density at low potential. [37][38][39] The work on the influence of the state of nickel surface on its HOR activity performed by Oshchepkov et al [40][41][42] provided insights on the origin of the observed inconsistencies.…”

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confidence: 99%

Nickel 3D Structures Enhanced by Electrodeposition of Nickel Nanoparticles as High Performance Anodes for Direct Borohydride Fuel Cells

et al. 2020

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Direct borohydride fuel cell (DBFC) is a promising technology to power portable and mobile devices thanks to their high theoretical voltage and good energy density. Carbon-supported electrodeposited nickel-metal catalysts (Ni ED /C) exhibit fast kinetics for the borohydride oxidation reaction (BOR). One key is to deposit nickel-metal on sufficiently open structures to make electrodes compatible with fast mass-transfer, so as to further optimize the fuel cell performance. To that goal, Ni foams (NFM) or felts (NFT) can be used. Being inherently surface-oxidized (passivated) and of too low developed area, these supports were enhanced by both oxides removal/ depassivation (using electro-assisted (or not) acid etching) and nickel electrodeposition, in order to exhibit the combined properties of fast diffusion medium and high-surface area resulting in the highly-active catalysts. After such enhancement, Ni ED /NFT shows superior performance in the BOR compared to carbon-supported Ni catalysts. To make a fair comparison with PGM, Pt catalysts supported on open carbon structures were also studied and presented slightly smaller performance than the Ni ED /NFT electrodes, in particular in terms of open-circuit potential and current density at high cell voltage.[a] G. Braesch, Prof. M. Chatenet

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A new application of nickel-boron amorphous alloy nanoparticles: anode-catalyzed direct borohydride fuel cell

Cited by 23 publications

References 37 publications

Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

Recent Advances in the Understanding of Nickel-Based Catalysts for the Oxidation of Hydrogen-Containing Fuels in Alkaline Media

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

Nickel 3D Structures Enhanced by Electrodeposition of Nickel Nanoparticles as High Performance Anodes for Direct Borohydride Fuel Cells

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