Insights into the borohydride electrooxidation reaction on metallic nickel from operando FTIRS, on-line DEMS and DFT

Oshchepkov, Alexandr G.; Braesch, Guillaume; Rostamikia, Gholamreza; Bonnefont, Antoine; Janik, Michael J.; Chatenet, Marian; Savinova, Elena R.

doi:10.1016/j.electacta.2021.138721

Cited by 18 publications

(3 citation statements)

References 50 publications

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“…Pd is also electrocatalytically active for both the oxidation of BH 4 − and its intermediates, as well as for H 2 generation/oxidation; however, reaction kinetics are still slower than for Pt [14]. Ni has been reported as a low-cost BOR catalyst ensuring a low (below 0 V vs. RHE) open-circuit potential (OCP) and enabling good net BOR currents [15]. Alloying or mixing different group metals, such as PdNi or CuNi, has increased the activity and selectivity for BOR [16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells

et al. 2023

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Direct liquid fuel cells represent one of the most rapidly emerging energy conversion devices. The main challenge in developing fuel cell devices is finding low-cost and highly active catalysts. In this work, PET bottle waste was transformed into nitrogen-doped graphene (NG) as valuable catalyst support. NG was prepared by a one-pot thermal decomposition process of mineral water waste bottles with urea at 800 °C. Then, NG/Pt electrocatalysts with Pt loadings as low as 0.9 wt.% and 1.8 wt.% were prepared via a simple reduction method in aqueous solution at room temperature. The physical and electrochemical properties of the NG/Pt electrocatalysts are characterized and evaluated for application in direct borohydride peroxide fuel cells (DBPFCs). The results show that NG/Pt catalysts display catalytic activity for borohydride oxidation reaction, particularly the NG/Pt_1, with a number of exchanged electrons of 2.7. Using NG/Pt composite in fuel cells is anticipated to lower prices and boost the usage of electrochemical energy devices. A DBPFC fuel cell using NG/Pt_1 catalyst (1.8 wt.% Pt) in the anode achieved a power density of 75 mW cm−2 at 45 °C. The exceptional performance and economic viability become even more evident when expressed as mass-specific power density, reaching a value as high as 15.8 W mgPt−1.

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Section: Introductionmentioning

confidence: 99%

From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells

et al. 2023

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“…Recently, the low-cost transition metals (Co, Cu, Ni, etc.) with unoccupied 3d orbital preferring to adsorb BH 4 – are intensively investigated as main elements of BOR electrocatalysts. − To improve the catalytic performance of transition-metal catalysts, there are three important strategies: (1) Using transition metals alloying to modulate the local electronic state and chemical environment of metal atoms, thus adjusting the adsorption of intermediates on catalysts surface and further regulating the electrocatalytic performance . (2) Doping nonmetal elements to further improve the intrinsic activity of BOR catalysts.…”

Section: Introductionmentioning

confidence: 99%

Carbon Coated and Nitrogen Doped Hierarchical NiMo-Based Electrocatalysts with High Activity and Durability for Efficient Borohydride Oxidation

Zhuang

Tai

et al. 2022

ACS Appl. Mater. Interfaces

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Sodium borohydride is a promising candidate as hydrogen storage material. The direct borohydride fuel cell (DBFC) as an energy conversation device has attracted intensive attention owing to the low theoretical potential of borohydride oxidation reaction (BOR, −1.24 V vs SHE) on the anode. In this paper, the hierarchical sea urchin-like NiMoN@NC coated by thin carbon layer with optimal BH 4 − adsorption characteristic was synthesized as a superior electrocatalyst toward BOR. In 1 M NaOH-0.05 M NaBH 4 , the BOR working potentials are only −55 and 44 mV at the current densities of 10 and 200 mA cm −2 on NiMoN@NC, respectively. Furthermore, the membrane-free DBFC using NiMoN@NC as anodic electrocatalyst shows a maximum power density of 67 mW cm −2 at room temperature with appreciative stability. This well-designed carbon coated and nitrogen doped transitionmetal material with hierarchical nano/microstructure as a highly efficient electrocatalyst shows promising potential and bright prospects in electrocatalysis research and practical application for energy conversion systems of DBFC.

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“…This phenomenon depends on the electrode material. In this case, on nickel [5,9,10,16,17] and Pt [10,15], the final reaction of borohydride oxidation occurs through a four-electron process:…”

Section: Introductionmentioning

confidence: 99%

Platinum Nanoparticles Modified Copper/Titanium Electrodes as Electrocatalysts for Borohydride Oxidation

et al. 2021

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In this study, sodium borohydride oxidation has been investigated on the platinum nanoparticles modified copper/titanium catalysts (PtNPsCu/Ti), which were fabricated by employing the electroless copper plating and galvanic displacement technique. ICP-OES, XRD, FESEM, and EDX have been used to characterize PtNPsCu/Ti catalysts’ composition, structure, and surface morphology. The oxidation of sodium borohydride was examined on the PtNPsCu/Ti catalysts using cyclic voltammetry and chrono-techniques.

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Insights into the borohydride electrooxidation reaction on metallic nickel from operando FTIRS, on-line DEMS and DFT

Cited by 18 publications

References 50 publications

From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells

From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells

Carbon Coated and Nitrogen Doped Hierarchical NiMo-Based Electrocatalysts with High Activity and Durability for Efficient Borohydride Oxidation

Platinum Nanoparticles Modified Copper/Titanium Electrodes as Electrocatalysts for Borohydride Oxidation

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