Multiphase PdCu nanoparticles with improved C1 selectivity in ethanol oxidation

Xu, Wenxia; Wu, Xueke; Yuan, Yueyue; Qin, Yingnan; Liu, Yanru; Wang, Zuochao; Zhang, Dan; Li, Hongdong; Lai, Jianping; Wang, Lei

doi:10.1039/d2qi00869f

Cited by 9 publications

(8 citation statements)

References 67 publications

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“…Beyond the phase transitions between individual crystal phases, the unique interface effects arising from mixed crystal phases offer a promising avenue for catalyst optimization. Mixed crystal phases refer to structures containing two or more crystal phases within the same sample, and their realization can be achieved through diverse methods, such as temperature or pressure adjustment, solvothermal reactions, electrodeposition, and electron beam irradiation. , The mixing of crystal phases has the capacity to induce changes in the electronic structure of metal atoms, fine-tune the filling of d-band electrons, and optimize adsorption properties. , For instance, in the context of metal oxides, the lattice mismatch at the interface of mixed crystal phases can generate a significant number of oxygen vacancies, leading to heightened catalytic activity. , In the case of semiconductor materials, the presence of heterojunctions can exert a substantial influence on optical properties, effectively suppress electron–hole recombination, and facilitate the transfer of photogenerated electrons to reactive sites. This, in turn, contributes to the stabilization of charge separation efficiency and the enhancement of catalytic activity. ,, The field of crystal-phase engineering offers a versatile toolkit for modifying the photocatalytic performance of pristine semiconductors .…”

Section: Structure–activity Relationship Of Crystal-phase Engineeringmentioning

confidence: 99%

“…Mixed crystal phases refer to structures containing two or more crystal phases within the same sample, and their realization can be achieved through diverse methods, such as temperature or pressure adjustment, solvothermal reactions, electrodeposition, and electron beam irradiation. 300,301 The mixing of crystal phases has the capacity to induce changes in the electronic structure of metal atoms, fine-tune the filling of d-band electrons, and optimize adsorption properties. 46,163 For instance, in the context of metal oxides, the lattice mismatch at the interface of mixed crystal phases can generate a significant number of oxygen vacancies, leading to heightened catalytic activity.…”

Section: Structure−activity Relationship Of Crystal-phase Engineeringmentioning

confidence: 99%

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Crystal-Phase Engineering in Heterogeneous Catalysis

Zhao,

Wang,

Feng

et al. 2023

Chem. Rev.

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The performance of a chemical reaction is critically dependent on the electronic and/or geometric structures of a material in heterogeneous catalysis. Over the past century, the Sabatier principle has already provided a conceptual framework for optimal catalyst design by adjusting the electronic structure of the catalytic material via a change in composition. Beyond composition, it is essential to recognize that the geometric atomic structures of a catalyst, encompassing terraces, edges, steps, kinks, and corners, have a substantial impact on the activity and selectivity of a chemical reaction. Crystal-phase engineering has the capacity to bring about substantial alterations in the electronic and geometric configurations of a catalyst, enabling control over coordination numbers, morphological features, and the arrangement of surface atoms. Modulating the crystallographic phase is therefore an important strategy for improving the stability, activity, and selectivity of catalytic materials. Nonetheless, a complete understanding of how the performance depends on the crystal phase of a catalyst remains elusive, primarily due to the absence of a molecular-level view of active sites across various crystal phases. In this review, we primarily focus on assessing the dependence of catalytic performance on crystal phases to elucidate the challenges and complexities inherent in heterogeneous catalysis, ultimately aiming for improved catalyst design.

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Section: Structure–activity Relationship Of Crystal-phase Engineeringmentioning

confidence: 99%

Section: Structure−activity Relationship Of Crystal-phase Engineeringmentioning

confidence: 99%

Crystal-Phase Engineering in Heterogeneous Catalysis

Zhao,

Wang,

Feng

et al. 2023

Chem. Rev.

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“…Recent studies have shown that one of the key factors affecting the catalytic efficiency of palladium-based nanocatalysts is the catalytic active site on the catalyst surface, and the catalytic efficiency of palladium-based catalysts can be greatly improved by constructing abundant catalytic active sites . The introduction of defects in palladium-based nanocatalysts is the most direct way to construct catalytic active sites. − And among the different types of defects introduced, interfacial defects in the construction of heterogeneous structures show unique advantages. − The palladium atoms at interfacial defects have more uncoordinated bonds and high surface energy, which can effectively strengthen the interaction between palladium atoms and alcohol molecules so that alcohol molecules are more easily adsorbed on the surface of palladium atoms, thus improving the catalytic efficiency. , However, at present, the conditions for constructing such multiphase interfacial palladium-based catalysts are harsh, and the steps are complicated. Furthermore, the synthesized multiphase structures have poor controllability.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus-Doped PdSn Nanowires for Electrocatalytic Alcohol Oxidation

Li,

Xi,

Jiang

et al. 2024

ACS Appl. Nano Mater.

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Multiphase palladium-based nanocatalysts provide more active sites for electrocatalytic reactions due to their abundant interfacial defects, thus effectively promoting their electrocatalytic efficiency. However, the preparation and synthesis of such multiphasestructure palladium-based catalysts and the fine regulation of their compositions are still a great challenge. In this work, multiphase wavy PdSnP nanowire catalysts were obtained by doping PdSn nanocatalysts with phosphorus atoms. The nonmetallic phosphorus atom can turn the crystal phase into the amorphous phase when it enters the lattice of PdSn nanowire catalysts. Therefore, a crystalline and amorphous multiphase structure can be constructed in wavy PdSn nanowire catalysts by controlling the doping of phosphorus atoms carefully. Due to atoms with abundant interfacial defects on their surface, the multiphase wavy PdSnP nanowire catalysts showed enhanced catalytic efficiency in the electrocatalytic oxidation reactions of methanol and ethanol. In the methanol oxidation reaction, the mass and specific activities of the multiphase PdSn 0.41 P 0.093 nanocatalyst are 4617.2 mA mg Pd −1 and 20.89 mA cm −2 , respectively, and in the ethanol oxidation reaction, the mass and specific activities of the multiphase PdSn 0.41 P 0.093 nanocatalyst are 4453.1 mA mg Pd −1 and 20.14 mA cm −2 , respectively. This study provides a reference for the design and synthesis of high-efficiency electrocatalysts for methanol and ethanol oxidation.

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“…10,11 However, the currently used catalysts for the above reactions exhibited limited conversion efficiency. In light of this, it is crucial to develop cost-effective, stable and highly efficient catalysts to enable broader applications of the EOR and 4-NP reduction.Interestingly, Pd-based catalysts, such as PdCu, 12,13 PdNi, 14,15 and PdW, 16,17 etc. have emerged as excellent candidates for the EOR and 4-NP reduction.…”

mentioning

confidence: 99%

“…Interestingly, Pd-based catalysts, such as PdCu, 12,13 PdNi, 14,15 and PdW, 16,17 etc. have emerged as excellent candidates for the EOR and 4-NP reduction.…”

mentioning

confidence: 99%