Electronic and lattice strain dual tailoring for boosting Pd electrocatalysis in oxygen reduction reaction

Zeng, Qing; Liu, Danye; Liu, Hui; Cui, Penglei; Hu, Chaoquan; Chen, Dong; Xu, Lin; Wu, Xiang; Yang, Jun

doi:10.1016/j.isci.2021.103332

Cited by 15 publications

(12 citation statements)

References 70 publications

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“…Rationally, we can conceive that the combination of these two ways gives rise to higher EOR and ORR activity of Pd metal by further optimizing its adsorption for relevant reaction intermediates. Unfortunately, in the conventional seed-mediated growth method, which is capable of producing core–shell nanostructures, to avoid the occurrence of a galvanic replacement reaction, metals with nobler properties, e.g., gold (Au), are always located at the core region. ,− These nobler metals inevitably increase the cost of Pd as electrocatalysts. In addition, their larger lattice parameters often cause tensile strain in the Pd shell, not favorable for lowering its d-band center.…”

Section: Introductionsupporting

confidence: 76%

Core–Shell CuPd@NiPd Nanoparticles: Coupling Lateral Strain with Electronic Interaction toward High-Efficiency Electrocatalysis

Liu

Zeng

et al. 2022

ACS Catal.

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Geometric structure and chemical composition are two critical factors that determine the electronic properties of an active metal favorable for a given catalytic reaction. In this scenario, we develop a wet-chemistry method to construct core−shell nanoentities consisting of a CuPd alloy core and a NiPd alloy shell, termed as CuPd@NiPd, which involves the synthesis of CuNi alloy seeds, and a subsequent galvanic replacement reaction with Pd 2+ precursors in an organic medium at elevated temperature. In these unique core−shell nanostructures, the compressive lattice strain between core and shell regions and the electronic interaction between Pd and transitional elements could be coupled together to lead to a downshift of the d-band center of Pd sites, thus endowing them with good activity for catalyzing ethanol oxidation reaction (EOR) and oxygen reduction reaction (ORR). In particular, at an appropriate Pd/Cu precursor ratio of 1/1, the as-prepared core−shell CuPd@NiPd nanoparticles exhibit a mass activity of 5.1 A mg −1 for EOR and a half-wave potential of 0.91 V for ORR at room temperature in an alkaline medium, outperforming alloy CuPd, NiPd counterparts, commercial Pd/C, and the vast majority of recently reported Pd-based electrocatalysts.

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Section: Introductionsupporting

confidence: 76%

Core–Shell CuPd@NiPd Nanoparticles: Coupling Lateral Strain with Electronic Interaction toward High-Efficiency Electrocatalysis

Liu

Zeng

et al. 2022

ACS Catal.

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“…In theory, alloying a second metal into Pd would induce geometric and ligand effects that change its electrocatalysis for a given electrochemical reaction, e.g., ORR and EOR in this study. − The former refers to the lateral strain effect that is induced by different atomic sizes or arrangements, while the latter is caused by charge transfer or shift between the two dissimilar surface metal atoms. Both of them could alter the catalytic performance of the Pd metal by affecting its electronic band structure. − In the case of SnPd nanoalloys, the modification of geometric and ligand effects induced by Sn atoms on the Pd electronic band structure may offset, meaning that the alloys could maximize their catalytic advantages only at an optimal Sn/Pd ratio.…”

Section: Results and Discussionmentioning

confidence: 95%

Ultrafine SnPd Nanoalloys Promise High-Efficiency Electrocatalysis for Ethanol Oxidation and Oxygen Reduction

Liu

Tian

et al. 2023

ACS Appl. Energy Mater.

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The catalytic activity and stability of palladium (Pd)-based electrocatalysts for ethanol oxidation reaction (EOR) and oxygen reduction reaction (ORR) can be improved by optimizing their composition and structure. Alloying tin (Sn) into Pd can induce electronic and synergistic effects, which weaken the adsorption of intermediate species (e.g., O and OH in ORR and CO in EOR) on Pd sites and even promote their further transformation. However, the SnPd alloys often suffer from complicated synthesis, large particle size, and inhomogeneity. In this context, we report the synthesis of SnPd nanoalloys with an ultrafine size of ca. 3.8 nm using a simple one-pot approach and their superior catalytic performance for EOR and ORR. Specifically, the SnPd alloy nanoparticles with an optimized Sn/Pd ratio of 18/82 show the mass and specific activity of 3.8 A mg −1 and 5.72 mA cm −2 , respectively, for EOR, while excellent performance for ORR with a half-wave potential of 0.92 V and specific activity of 3.46 mA cm −2 at 0.9 V, both of which are much higher than those of their commercial Pd/C and Pt/C counterparts.

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“…HAuCl 4 ·4H 2 O is first added into oleamine; then, Au NPs are reduced by vigorous stirring at a high temperature (150 °C) [ 67 ]. Finally, Ni(acac) 2 is added for the reduction of Ni 2+ .…”

Section: Factors Affecting the Orr Performances Of The Core-shell Str...mentioning

confidence: 99%

“…In Pd@Pt, Rh@Pd and Rh@Pt materials, the compressive strain decreased gradually after about 5–6 ML. Zeng et al [ 67 ] modified the preparation method of Au@Ni NPs and synthesized Au@NiPd catalyst with a shell of only three atomic layers by galvanically substituting Pd 2+ and shell Ni. With the decrease in shell layers, the tensile strain caused by lattice mismatch between Au with larger lattice parameters and Pd with smaller lattice parameters became more obvious.…”

Section: Factors Affecting the Orr Performances Of The Core-shell Str...mentioning

confidence: 99%

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Noble Metal-Based Catalysts with Core-Shell Structure for Oxygen Reduction Reaction: Progress and Prospective

Wang

Qin

et al. 2022

Nanomaterials

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With the deterioration of the ecological environment and the depletion of fossil energy, fuel cells, representing a new generation of clean energy, have received widespread attention. This review summarized recent progress in noble metal-based core–shell catalysts for oxygen reduction reactions (ORRs) in proton exchange membrane fuel cells (PEMFCs). The novel testing methods, performance evaluation parameters and research methods of ORR were briefly introduced. The effects of the preparation method, temperature, kinds of doping elements and the number of shell layers on the ORR performances of noble metal-based core–shell catalysts were highlighted. The difficulties of mass production and the high cost of noble metal-based core–shell nanostructured ORR catalysts were also summarized. Thus, in order to promote the commercialization of noble metal-based core–shell catalysts, research directions and prospects on the further development of high performance ORR catalysts with simple synthesis and low cost are presented.

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Electronic and lattice strain dual tailoring for boosting Pd electrocatalysis in oxygen reduction reaction

Cited by 15 publications

References 70 publications

Core–Shell CuPd@NiPd Nanoparticles: Coupling Lateral Strain with Electronic Interaction toward High-Efficiency Electrocatalysis

Core–Shell CuPd@NiPd Nanoparticles: Coupling Lateral Strain with Electronic Interaction toward High-Efficiency Electrocatalysis

Ultrafine SnPd Nanoalloys Promise High-Efficiency Electrocatalysis for Ethanol Oxidation and Oxygen Reduction

Noble Metal-Based Catalysts with Core-Shell Structure for Oxygen Reduction Reaction: Progress and Prospective

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