Carbon supported PdM (M = Fe, Co) electrocatalysts for formic acid oxidation. Influence of the Fe and Co precursors

Juárez-Marmolejo, L.; Pérez-Rodríguez, S.; Yemha, María Guadalupe Montes de Oca; Palomar-Pardavé, M.; Romero-Romo, M.; Ezeta-Mejía, A.; Morales-Gil, Perla; Martı́nez-Huerta, M.V.; Lázaro, M.J.

doi:10.1016/j.ijhydene.2018.11.112

Cited by 38 publications

(24 citation statements)

References 55 publications

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“…As one of the platinum group metals, the development of palladium (Pd) catalysts has aroused great interest because they exhibit excellent electrocatalytic activities both in anode and in cathode reactions. [18][19][20][21][22][23][24][25][26] Recently, great efforts have been focused on tuning the composition structures of Pd-based catalysts by introducing foreign metals. [13,22] Various morphologies of Pd-based materials have been synthesized with special structures (eg.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Free‐Standing Alloyed PdSn Nanoparticles with Enhanced Catalytic Performance for Ethanol Electrooxidation

Zhang

Yan

et al. 2021

ChemElectroChem

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Alloyed Pd-based nanostructured materials have been demonstrated as highly active fuel cell anode electrocatalysts for the alcohol oxidation reaction. Challenges remain in the controlled synthesis of freestanding PdM alloys catalysts through optimization of their interfacial and surface structures, which can prevent degradation and poor durability. Herein, we present an oil-bath-based approach to synthesize Pd x Sn y nanoparticles (NPs) with L-ascorbic acid (AA) as a reducing agent and cetyltrimethylammonium bromide as a structure-directing agent. Pd x Sn y NPs (x/y = 0.66, 0.83, and 1.11) show a particular freestanding shape. Among the three alloys, Pd 20 Sn 24 (x/y = 0.83) NPs have the best electrocatalytic activity (2018 mA mg À 1 ) toward the ethanol oxidation reaction (EOR). The enhanced performance of Pd x Sn y NPs might be attributed to i) a change in the electron structure of Pd, ii) varied interatomic distance within a unit cell, and iii) weak adsorption of in-situ generated oxygen-containing (e. g. *OH and PdÀ O) or carbon-containing (e. g. *CH 3 CHOH, *CH 3 CHO, and *CH 3 CO) intermediate species. Experimental data proposed that higher catalytic temperature, higher pH values, and higher ethanol concentration should accelerate each step of electrooxidation of the EOR.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Free‐Standing Alloyed PdSn Nanoparticles with Enhanced Catalytic Performance for Ethanol Electrooxidation

Zhang

Yan

et al. 2021

ChemElectroChem

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“…Another efficient way is to select suitable support with large surface area and good electrical conductivity for loading metal catalysts. The metal-support interaction can strongly influence the physicochemical and electrochemical properties of the metal catalysts [17]. Carbonaceous materials such as carbon blacks [18], carbon nanotubes [19] and graphene [20] are often used as catalyst supports.…”

Section: Introductionmentioning

confidence: 99%

High Active PdSn Binary Alloyed Catalysts Supported on B and N Codoped Graphene for Formic Acid Electro-Oxidation

Chen

Pei

et al. 2020

Catalysts

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A series of PdSn binary catalysts with varied molar ratios of Pd to Sn are synthesized on B and N dual-doped graphene supporting materials. The catalysts are characterized by X-ray diffraction (XRD) and Transmission electron microscopy (TEM). Formic acid electro-oxidation reaction is performed on these catalysts, and the results reveal that the optimal proportion of Pd:Sn is 3:1. X-ray photoelectron spectroscopy (XPS) measurements show that when compared with 3Pd1Sn/graphene, B and N co-doping into the graphene sheet can tune the electronic structure of graphene, favoring the formation of small-sized metallic nanoparticles with good dispersion. On the other hand, when compared with the monometallic counterparts, the incorporation of Sn can generate oxygenated species that help to remove the intermediates, exposing more active Pd sites. Moreover, the electrochemical tests illustrate that 3Pd1Sn/BN-G catalyst with a moderate amount of Sn exhibits the best catalytic activity and stability on formic acid electro-oxidation, owing to the synergistic effect of the Sn doping and the B, N co-doping graphene substrate.

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“…Pd nanoparticles supported on OMCs purified with NaOH-ethanol (Pd/OMC-R2 and Pd/OMC-R5) exhibited a bimodal distribution for CO oxidation, with the first (I) and second peaks (II) centered around 0.2 V and 0.4 V vs. Ag/AgCl, respectively. Other authors have also reported bimodal CO oxidation profiles on carbon-supported Pd nanoparticles [31][32][33]. In contrast, a single peak centered around 0.5 V vs. Ag/AgCl is observed for Pd/OMC-R5HF.…”

Section: Electrochemical Characterization Of Pd/omc Catalystsmentioning

confidence: 87%

Ordered Mesoporous Carbon as a Support of Pd Catalysts for CO2 Electrochemical Reduction

2020

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Ordered mesoporous carbons (OMCs) have been used as catalyst supports of Pd nanoparticles for the electrochemical reduction of CO2 in 0.1 M KHCO3. OMC with tunable porosity and morphology were obtained by the hard-template approach using synthesized SBA-15 templates. SBA-15 materials were prepared using a mass ratio of the silica precursor (TEOS) and the surfactant (P123) of 2 or 5. After removing silica particles by a purification treatment with NaOH-ethanol or HF, different OMCs were obtained, with a developed porosity (up to 1050 m2 g−1) and ordered 2D hexagonal mesostructure (p6 mm). An increase in the TEOS/P123 ratio as well as the treatment with HF resulted in a decrease in the structural ordering of the materials. Pd nanoparticles with an average size of around 3 nm were deposited on the OMC. However, larger nanoparticles were also observed, especially for the materials obtained using a mass ratio TEOS/P123 of 5. Despite these differences, electrochemical experiments showed that CO2 was successfully reduced to other species (mainly COad) for all Pd/OMC electrocatalysts. These reduced species were adsorbed on Pd active sites, inhibiting the hydrogen evolution reaction.

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Carbon supported PdM (M = Fe, Co) electrocatalysts for formic acid oxidation. Influence of the Fe and Co precursors

Cited by 38 publications

References 55 publications

Synthesis of Free‐Standing Alloyed PdSn Nanoparticles with Enhanced Catalytic Performance for Ethanol Electrooxidation

Synthesis of Free‐Standing Alloyed PdSn Nanoparticles with Enhanced Catalytic Performance for Ethanol Electrooxidation

High Active PdSn Binary Alloyed Catalysts Supported on B and N Codoped Graphene for Formic Acid Electro-Oxidation

Ordered Mesoporous Carbon as a Support of Pd Catalysts for CO2 Electrochemical Reduction

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