Electronic structure engineering of bimetallic Pd-Au alloy nanocatalysts for improving electrocatalytic hydrodechlorination performance

Chen, Yanju; Feng, Chao; Wang, Wenhong; Zhi, Liu; Li, Junxi; Liu, Chenguang; Pan, Yuan; Liu, Yunqi

doi:10.1016/j.seppur.2022.120731

Cited by 27 publications

(11 citation statements)

References 47 publications

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“…The results showed that in Pd-Au-ANS, Pd atoms “accepted” electrons and gold atoms “lost” electrons, forming electron-rich Pd, promoting the desorption of dechlorination product phenol, accelerating the renewal of the active center, and improving the performance of EHDC. Among them, Pd 7 Au 3 ANS had the highest EHDC activity, and its mass activity in 4-CP degradation was 7.83 times that of pure Pd nanoparticles …”

Section: Structure–activity Relationship Of Ehdc Catalystsmentioning

confidence: 99%

“…Among them, Pd 7 Au 3 ANS had the highest EHDC activity, and its mass activity in 4-CP degradation was 7.83 times that of pure Pd nanoparticles. 148…”

Section: Structure−activity Relationship Of Ehdc Catalystsmentioning

confidence: 99%

Section: Structure–activity Relationship Of Ehdc Catalystsmentioning

confidence: 99%

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Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Zhang

et al. 2023

ACS Catal.

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As a class of persistent pollutants that are easily bioaccumulatable and highly biotoxic, chlorinated organic pollutants exist in the environment and pose a substantial threat to ecological safety. The electrocatalytic hydrodechlorination (EHDC) technology shows the advantages of high efficiency, simple operation, mild reaction conditions, and no secondary pollution and thus promises a good application prospect in the treatment of chlorinecontaining pollutants. Pd-based catalysts are considered the most efficient catalysts for electroreductive dechlorination thus far, yet the reserves of Pd are scarce, and the price is often prohibitively high. The development of noble metal catalysts with high atom utilization and non-noble metal catalysts for EHDC has become a hot research topic, but relevant reviews are still lacking. In this paper, the research progress on EHDC catalysts during recent years is reviewed and the influence of catalyst microstructure regulation on the EHDC performance is discussed in detail. The regulation strategies including the regulation mechanisms of electronic effect, support effect, size effect, and coordination effect for enhancing the EHDC performance of catalysts at different scales (from nanostructures to single atoms) are summarized and proposed, which could provide guidance for the development of efficient EHDC catalysts from the atomic scale. At the end of this review, the application prospects and challenges for EHDC catalysts are also discussed.

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Section: Structure–activity Relationship Of Ehdc Catalystsmentioning

confidence: 99%

“…Among them, Pd 7 Au 3 ANS had the highest EHDC activity, and its mass activity in 4-CP degradation was 7.83 times that of pure Pd nanoparticles. 148…”

Section: Structure−activity Relationship Of Ehdc Catalystsmentioning

confidence: 99%

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Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Zhang

et al. 2023

ACS Catal.

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“…Chen et al proposed an electronic structure engineering to accelerate the ECH process by designing bimetallic PdÀ Au alloy nanoparticles with electron-rich Pd as efficient catalysts. [41] Experimental characterization and theoretical calculations showed that Pd atoms "gained" electrons and Au atoms "lost" electrons in PdÀ Au alloy nanoparticles, resulting in electron-rich Pd (Figure 4A). This catalyst preparation strategy promoted the desorption of the dechlorination product phenol while accelerating the renewal of active sites.…”

Section: Electron-rich Pdmentioning

confidence: 99%

Efficient Palladium Catalysts: Application and Challenges of Electrocatalytic Hydrodechlorination Technology in Wastewater Treatment

Li,

Kong

2023

ChemCatChem

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This review summarizes the research progress of palladium (Pd) catalysts in electrocatalytic hydrodechlorination (ECH) for the removal of chlorinated organic pollutants (COPs). ECH technology is a new type of green water treatment technology without secondary pollution, which has excellent removal effect on COPs. Pd is widely used in the field of ECH due to its excellent catalytic properties. However, the easy deactivation and high price of Pd have limited the application of Pd catalysts in practical wastewater treatment. Researchers have improved the performance of Pd catalysts for ECH by improving the morphological structure (dispersion, particle size, crystalline surface) and electronic states (electron‐rich Pd, electron‐deficient Pd). It is also found that modulation of the adsorption abilities of Pd catalysts can greatly improve the catalytic activity. The factors affecting the stability of Pd catalysts are also investigated, and the future large‐scale mature application of ECH technology is envisioned. The ability to prepare single‐atom Pd catalysts in a relatively simple way is a future direction, which will achieve 100% atom utilization and thus significantly reduce the cost of Pd. This review details the frontier research on Pd catalysts in the field of ECH, which can provide some good strategies for related researchers.

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“…In heterogeneous catalysis, the catalytic hydrogenation reaction is considered as one of the important reactions and is very vital for several industrial reactions, such as the hydrodechlorination , and hydrogenation of unsaturated hydrocarbons. − All these reactions involve hydrogen dissociation reaction (HDR) as a fundamental or elementary step. Moreover, upon dissociation, the hydrogen molecule dissociates into active atomic hydrogen, which is then adsorbed onto the catalyst surface or a support material, hence making it feasible to store a huge quantity of hydrogen at optimal pressures and temperatures. , Additionally, in the hydrogenation process, the hydrogen dissociation step is regarded as the rate-limiting or rate-determining steps.…”

Section: Introductionmentioning

confidence: 99%

Metallofullerenes as Robust Single-Atom Catalysts for Adsorption and Dissociation of Hydrogen Molecules: A Density Functional Study

Sarfaraz,

Yar,

Hussain

et al. 2023

ACS Omega

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Hydrogen is currently considered as the best alternative for traditional fuels due to its sustainable and ecofriendly nature. Additionally, hydrogen dissociation is a critical step in almost all hydrogenation reactions, which is crucial in industrial chemical production. A cost-effective and efficient catalyst with favorable activity for this step is highly desirable. Herein, transition-metal-doped fullerene (TM@C60) complexes are designed and investigated as single-atom catalysts for the hydrogen splitting process. Interaction energy analysis (E int) is also carried out to demonstrate the stability of designed TM@C60 metallofullerenes, which reveals that all the designed complexes have higher thermodynamic stability. Furthermore, among all the studied metallofullerenes, the best catalytic efficiency for hydrogen dissociation is seen for the Sc@C60 catalyst E a = 0.13 eV followed by the V@C60 catalyst E a = 0.19 eV. The hydrogen activation and dissociation processes over TM@C60 metallofullerenes is further elaborated by analyzing charge transfer via the natural bond orbital and electron density difference analyses. Additionally, quantum theory of atoms in molecule analysis is carried out to investigate the nature of interatomic interactions between hydrogen molecules and TMs@C60 metallofullerenes. Overall, results of the current study declare that the Sc@C60 catalyst can act as a low cost, highly efficient, and noble metal-free single-atom catalyst to efficiently catalyze hydrogen dissociation reaction.

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Electronic structure engineering of bimetallic Pd-Au alloy nanocatalysts for improving electrocatalytic hydrodechlorination performance

Cited by 27 publications

References 47 publications

Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Efficient Palladium Catalysts: Application and Challenges of Electrocatalytic Hydrodechlorination Technology in Wastewater Treatment

Metallofullerenes as Robust Single-Atom Catalysts for Adsorption and Dissociation of Hydrogen Molecules: A Density Functional Study

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