Bimetallic PdAg nanoparticles for enhanced electrocatalysis of ethanol oxidation reaction

Chen, Jianyu; Yang, Min; Pang, Mingyuan; Gao, Fahui; Guo, Peizhi

doi:10.1016/j.colsurfa.2021.127404

Cited by 18 publications

(6 citation statements)

References 51 publications

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“…Several in-situ Infrared spectroscopy (IR) and in-situ Raman spectroscopy measurements are reported that the generated oxygen-containing or carbon-containing C 2 intermediates species would poison electrocatalysts, thereby capturing the exposed reaction sites on the surface of electrocatalysts. [14][15][16][17] So, developing efficient electrocatalysts has become more urgent.…”

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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“…41 The lower intensity of O K-edge features in the Pd/Co 1 Fe 3 − LDH/NF catalyst indicated crystal structure distortion of 6a), evidencing the reduction reaction of oxidized PdO into metallic Pd. 42 It could be seen that Pd/Co 1 Fe 3 −LDH/NF exhibited the highest intensities and active areas than Pd/NF, suggesting that Pd/Co 1 Fe 3 − LDH/NF had more active sites and higher utilization efficiency. This was due to the homogeneous dispersion of Pd nanoparticles on Co 1 Fe 3 −LDH/NF with a high specific surface area structure, which could remarkably facilitate electron and mass transfer between the electrolyte and the catalyst.…”

Section: Resultsmentioning

confidence: 92%

“…The electrocatalytic activity of Pd/Co 1 Fe 3 –LDH/NF was evaluated in a N 2 -saturated KOH (1.0 M) solution, while Pd/NF, Pd/C (20%), Pt/C (20%), Co 1 Fe 3 –LDH/NF, and NF were applied as comparison samples. The cyclic voltammograms (CV) of Pd/Co 1 Fe 3 –LDH/NF and Pd/NF electrodes each exhibited two pronounced cathode peaks ranging from −0.6 to −0.25 V (Figure a), evidencing the reduction reaction of oxidized PdO into metallic Pd . It could be seen that Pd/Co 1 Fe 3 –LDH/NF exhibited the highest intensities and active areas than Pd/NF, suggesting that Pd/Co 1 Fe 3 –LDH/NF had more active sites and higher utilization efficiency.…”

Section: Resultsmentioning

confidence: 99%

CoFe-Layered Double Hydroxide Coupled with Pd Particles for Electrocatalytic Ethanol Oxidation

Song

Xie

et al. 2023

ACS Appl. Mater. Interfaces

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Electrocatalytic efficiency and stability have emerged as critical issues in the ethanol oxidation reaction (EOR) of direct ethanol fuel cells. In this paper, Pd/Co1Fe3–LDH/NF as an electrocatalyst for EOR was prepared by a two-step synthetic strategy. Metal–oxygen bonds formed between Pd nanoparticles and Co1Fe3–LDH/NF guaranteed structural stability and adequate surface-active site exposure. More importantly, the charge transfer of the formed Pd–O–Co(Fe) bridge could effectively modulate the electrical structure of hybrids, improving the facilitated absorption of OH– radicals and oxidation of COads. Benefiting from the interfacial interaction, exposed active sites, and structural stability, the observed specific activity for Pd/Co1Fe3–LDH/NF (17.46 mA cm–2) was 97 and 73 times higher than those of commercial Pd/C (20%) (0.18 mA cm–2) and Pt/C (20%) (0.24 mA cm–2), respectively. Besides, the j f/j r ratio representing the resistance to catalyst poisoning was 1.92 in the Pd/Co1Fe3–LDH/NF catalytic system. These results provide insights into optimizing the electronic interaction between metals and the support of electrocatalysts for EOR.

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“…To further analyze the crystal structure of Pd 62 Ag 38 PNWs, XRD measurement was performed on Pd 62 Ag 38 PNWs. Figure E shows that the XRD peak of Pd 62 Ag 38 PNWs is located between the standard XRD peaks of Pd (PDF# 46-1043) and Ag (PDF# 04-0783), indicating that Pd and Ag form an alloy phase. , Figure G is the HRTEM image of Pd 62 Ag 38 PNWs, which shows that the lattice width of Pd 62 Ag 38 PNWs is 0.233 nm, corresponding to the (111) plane of the PdAg alloy. , In summary, Pd 62 Ag 38 PNWs form a PdAg alloy phase. The surface composition and element valence of Pd 62 Ag 38 PNWs were measured by XPS. , The results are shown in Figure S4.…”

Section: Resultsmentioning

confidence: 99%

Simple Synthesis of PdAg Porous Nanowires as Effective Catalysts for Polyol Oxidation Reaction

Zhang

Zou

et al. 2022

Inorg. Chem.

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The development of efficient and stable Pd-based electrocatalysts is extremely important to facilitate the development of catalysts for polyol oxidation reactions. To synthesize Pd-based catalysts with excellent catalytic performance, a series of PdAg porous nanowires (PdAg PNWs) with different elemental ratios was constructed by facile synthesis using a seed-mediated method. The synthesized PdAg PNWs have a rough surface and a porous one-dimensional structure, which optimize the specific surface area and surface area of catalysts, thereby providing more active sites for catalysts. PdAg PNWs benefited from the geometric effect of porous nanowires and the synergy between Pd and Ag, showing excellent catalysis (8243.0 and 4137.0 mA mgPd –1) for the ethylene glycol oxidation reaction (EGOR) and glycerol oxidation reaction (GOR). Among them, the optimal Pd62Ag38 PNWs show the highest catalytic activity (6.0 times and 3.9 times higher than Pd/C) and stability compared with Pd57Ag43 PNWs, Pd51Ag49 PNWs, and Pd/C for EGOR and GOR. At the same time, this porous one-dimensional structure also endows PdAg PNWs with faster electron transfer capabilities than Pd/C. This work will likely provide an effective strategy for constructing cost-effective catalysts.

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Bimetallic PdAg nanoparticles for enhanced electrocatalysis of ethanol oxidation reaction

Cited by 18 publications

References 51 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

CoFe-Layered Double Hydroxide Coupled with Pd Particles for Electrocatalytic Ethanol Oxidation

Simple Synthesis of PdAg Porous Nanowires as Effective Catalysts for Polyol Oxidation Reaction

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