Palladium–copper electrocatalyst for the promotion of the electrochemical oxidation of polyalcohol fuels in the alkaline direct alcohol fuel cell

Munoz, Fabian; Hua, Chau; Kwong, Tiffany C.; Tran, Lyndon; Nguyen, Tien Quang; Haan, John L.

doi:10.1016/j.apcatb.2015.03.027

Cited by 77 publications

(43 citation statements)

References 41 publications

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“…The largest d‐band center shift (+0.12 eV relative to that of Pd/C) was also obtained for Pd 53 Ni 47 /C. This electronic effect has been previously described in other systems, but it is the first time to the best of our knowledge that it is reported for the oxidation of PG on PdNi/C catalyst in alkaline media ,,,. Figure shows a linear correlation between the oxidation rate of PG on various PdNi/C catalysts and the position of the d‐band center.…”

Section: Resultssupporting

confidence: 71%

Improved Electrochemical Oxidation of Polyalcohols in Alkaline Media on Palladium-Nickel Catalysts

et al. 2017

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Palladium is an efficient monoatomic catalyst for the electrochemical oxidation of polyalcohols in alkaline media, yet the oxidation rate is still slow compared to other smaller molecules. In order to improve the oxidation rate, Ni was mixed with Pd for synthesis of PdNi/C nanoparticles. The oxidation rates of ethylene glycol (EG), propylene glycol (PG), and glycerol (G) on Pd/C were compared to the oxidation rates on Pd16Ni84/C, Pd53Ni47/C, and Pd68Ni32/C. The oxidation rate of PG was enhanced by the presence of Ni as much as 14 times (Pd53Ni47/C). The oxidation rate of EG was enhanced 2.3 times on Pd68Ni32/C, and G was improved 2.9 times on Pd53Ni47/C. A significant shift in d‐band center was also observed (as high as +0.11 eV in Pd53Ni47/C) on each PdNi/C catalyst compared to that of Pd/C due to the presence of Ni. The correlation between increased oxidation rate and shift in d‐band center is indicative of the presence of an electronic effect, which is particularly strong for PG.

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Section: Resultssupporting

confidence: 71%

Improved Electrochemical Oxidation of Polyalcohols in Alkaline Media on Palladium-Nickel Catalysts

et al. 2017

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“…6 mW cm −2 in a passive fuel cell and an MPD of ca. 80 mW cm −2 in an active fuel cell operating at 80 • C. Later, a lot of works focused on ADGFCs for energy production [13,23,33,41,44,46,47,[54][55][56]66,. Fuel cell performance not only depends on the catalysts and AAEM, but also on the fuel cell operating parameters, such as fuel and alkali concentration, temperature and fuel cell operation mode (active or passive).…”

Section: Adgfcs For Energy Productionmentioning

confidence: 99%

Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Antolini¹

2019

Catalysts

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The low price, highly active triol structure, high volumetric energy density, simple storage and environment-friendly properties make glycerol a promising fuel for an alkaline direct alcohol fuel cell (ADAFC). Unlike other ADAFCs, alkaline direct glycerol fuel cells (ADGFCs) can be used either to generate only energy (the common use of fuel cells) or to produce both energy and valuable chemicals. This work presents an overview of catalysts for glycerol oxidation in alkaline media, and their use in ADGFCs. A particular attention was paid to binary and ternary catalysts able both to increase the selectivity to valuable C3 glycerol oxidation products, reducing the C-C bond cleavage, and simultaneously to enhance glycerol conversion.

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“…Palladium has displayed interesting characteristics for the oxidation of small organic molecules, due to its adsorption force in alkaline media . In contrast, the use of Pd only as a catalyst decreases its efficiency due to the generated oxidation intermediates that block the Pd catalytic site.…”

Section: Introductionmentioning

confidence: 99%

“…[8,9] Palladium has displayed interesting characteristics for the oxidation of small organic molecules, due to its adsorption force in alkaline media. [10] In contrast, the use of Pd only as a catalyst decreases its efficiency due to the generated oxidation intermediates that block the Pd catalytic site. To reduce this poisoning, nanoparticles comprising other non-noble metals have been applied close to the effective noble metal electrocatalyst.…”

Section: Introductionmentioning

confidence: 99%

Niobium Enhances Electrocatalytic Pd Activity in Alkaline Direct Glycerol Fuel Cells

et al. 2019

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Pd x Nb y /C binary electrocatalysts supported on Printex 6 L carbon black were prepared by using an adapted chemical reduction method with sodium borohydride. The electrocatalysts were characterized by using SEM, TEM, XRD, EDS, ICP-MS, water contact angle and Raman spectroscopy. The best performance for the alkaline direct glycerol fuel cell (ADGFC) was obtained by using Pd 1 Nb 1 /C, which yielded a maximum power density of 27 mW cm À 2 at 70°C. Residues of products formed from the glycerol oxidation were analyzed by using FT-Raman and high-performance liquid chromatography (HPLC).The Pd 1 Nb 1 /C electrocatalyst exhibited a more negative onset potential for the CO oxidation reaction and a higher conversion rate of glycerol to carbonate. We suggest that the higher hydrophilicity, higher degree of disorder, and bifunctional effects enhanced the electrocatalytic activity of Pd, as Nb facilitated the oxidation of adsorbed CO in Pd and increased the transfer rate of electron from Pd to carbon black support Therefore, Nb is a promising co-catalyst for Pd-based electrocatalysts for ADGFCs.

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Palladium–copper electrocatalyst for the promotion of the electrochemical oxidation of polyalcohol fuels in the alkaline direct alcohol fuel cell

Cited by 77 publications

References 41 publications

Improved Electrochemical Oxidation of Polyalcohols in Alkaline Media on Palladium-Nickel Catalysts

Improved Electrochemical Oxidation of Polyalcohols in Alkaline Media on Palladium-Nickel Catalysts

Glycerol Electro-Oxidation in Alkaline Media and Alkaline Direct Glycerol Fuel Cells

Niobium Enhances Electrocatalytic Pd Activity in Alkaline Direct Glycerol Fuel Cells

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