A split pH direct liquid fuel cell powered by propanol or glycerol

Chino, Isabel; Hendrix, Kimberly; Keramati, Abtin; Muneeb, Omar; Haan, John L.

doi:10.1016/j.apenergy.2019.113323

Cited by 23 publications

(11 citation statements)

References 34 publications

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“…When the cell was connected before any measurements, initial OCVs of 0.64 and 0.85 V are recorded for the Pd/Ni/MOFDC and Pd/AT-Ni/MOFDC, respectively. However, during measurements, the OCV for both systems is slightly above 1.0 V (1.02 V), which may be related to hydrogen peroxide oxidant (OCV = 1.14 V) or water splitting (OCV = 1.23 V) of the supporting electrolyte on the Pd electrocatalysts, as also observed by many others. − …”

Section: Resultssupporting

confidence: 82%

Unmasking the Latent Passivating Roles of Ni(OH)₂ on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells

Ipadeola

Mathebula

Pagliaro

et al. 2020

ACS Appl. Energy Mater.

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Nicked-based metal−organic framework-derived carbon (Ni/MOFDC) and its acid-treated counterpart (AT-Ni/ MOFDC) have been prepared as supports for palladium nanoparticle electrocatalysts (Pd/Ni/MOFDC and Pd/AT-Ni/MOFDC). These materials have been prepared using facile microwave-assisted techniques. Several spectroscopic and microscopic techniques (such as FTIR, Raman, PXRD, XPS, XANES, FT-EXAFS, and TEM) have been used to thoroughly characterize physicochemical properties of the materials. It is revealed that acid treatment successfully cleaned the metallic Ni surface of the passivating hydroxides (Ni(OH) 2 and NiOOH) to generate a very low concentration of Ni nanoparticles on the carbon support. The Ni-deficient Pd/AT-Ni/MOFDC shows excellent electrocatalytic performance toward ethanol oxidation reaction (EOR) in the alkaline medium compared to the Ni-hydroxide-rich Pd/Ni/MOFDC counterpart.As a proof-of-concept, these electrocatalysts have been employed as anodes and demonstrated for membraneless direct ethanol microfuel cells (μ-DEFCs) with a micro-3D-printed cell, with FeCo/C as electrocatalyst for the oxygen reduction reaction at the cathode. The Pd/AT-Ni/MOFDC displays increased peak power density (P m = 26.49 mW cm −2 ) with 68% voltage retention after a 24 h galvanostatic discharge test at 40 mA cm −2 and reduced impedance. The improved electrocatalytic properties of the Pd/AT-Ni/MOFDC underscore the need to clean the nickel surface of its passivating hydroxides to harness its full promotional activities toward alcohol oxidation reaction on precious metal electrocatalysts.

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Section: Resultssupporting

confidence: 82%

Unmasking the Latent Passivating Roles of Ni(OH)₂ on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells

Ipadeola

Mathebula

Pagliaro

et al. 2020

ACS Appl. Energy Mater.

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“…These features have been already observed on different electrocatalysts; such as Pt/C, Pt-Rh, Pt-Ni/C and Pt-Sn/C. [13][14][15][16][17][18][19][20] The rst oxidation peak (peak I) corresponds mainly to the formation of CO 2 for ethanol and to the formation of CO 2 and acetone for 2-propanol whereas the second oxidation peak (peak II) is caused by other products as acetic acid and acetaldehyde for ethanol and to the oxidation of acetone for 2-propanol. The mechanism of ethanol electrooxidation in acid solution has been summarized as the following scheme of parallel reactions:…”

Section: Ethanol and 2-propanol Electrooxidation On Pt/c And Pt-ni/c supporting

confidence: 58%

“…[8][9][10][11] Another alcohol, 2-propanol is reported to have a promising future for DAFCs due to no CO formation, lower crossover effect and also less toxicity comparing to methanol. [12][13][14][15][16] Carbon supported Pt electrocatalysts are well-known to be active for the electrochemical oxidation of ethanol and 2-propanol in acid media. However, Pt is easily poisoned by strongly adsorbed residues of alcohol electro-oxidation.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic performance of Pt–Ni nanoparticles supported on an activated graphite electrode for ethanol and 2-propanol oxidation

et al. 2020

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“…Chino et al . [8] highlighted that the advantages of using DGFCs are that under alkaline conditions, a less corrosive environment is possible to be achieved as well as to use non‐metallic nanoparticles. In agreement with Nascimento et al .…”

Section: Introductionmentioning

confidence: 99%

Borohydride Reduction Method for PdIn/C Electrocatalysts Synthesis towards Glycerol Electrooxidation under Alkaline Condition

et al. 2021

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Pd−In/C electrocatalysts were synthesized by the adapted borohydride reduction method in different atomic ratios. Electrocatalysts were evaluated by conventional electrochemical techniques and direct glycerol fuel cells. X‐ray diffraction profiles indicated the structure of Pd and In (fcc) phases, as well as the presence of In higher oxidation states. Regarding Transmission electron microscopy, it showed the particle‘s average diameters between 6.1–12.7 nm. All PdIn/C electrocatalysts showed high current values for −0.30 V vs. Ag/AgCl, which the best one was PdIn/C 90 : 10. Higher performance for glycerol oxidation was observed in polarization curves at 90 °C for PdIn/C (30 : 70) composition.

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A split pH direct liquid fuel cell powered by propanol or glycerol

Cited by 23 publications

References 34 publications

Unmasking the Latent Passivating Roles of Ni(OH)₂ on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells

Unmasking the Latent Passivating Roles of Ni(OH)₂ on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells

Electrocatalytic performance of Pt–Ni nanoparticles supported on an activated graphite electrode for ethanol and 2-propanol oxidation

Borohydride Reduction Method for PdIn/C Electrocatalysts Synthesis towards Glycerol Electrooxidation under Alkaline Condition

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A split pH direct liquid fuel cell powered by propanol or glycerol

Cited by 23 publications

References 34 publications

Unmasking the Latent Passivating Roles of Ni(OH)2 on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells

Unmasking the Latent Passivating Roles of Ni(OH)2 on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells

Electrocatalytic performance of Pt–Ni nanoparticles supported on an activated graphite electrode for ethanol and 2-propanol oxidation

Borohydride Reduction Method for PdIn/C Electrocatalysts Synthesis towards Glycerol Electrooxidation under Alkaline Condition

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Unmasking the Latent Passivating Roles of Ni(OH)₂ on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells

Unmasking the Latent Passivating Roles of Ni(OH)₂ on the Performance of Pd–Ni Electrocatalysts for Alkaline Ethanol Fuel Cells