One-step synthesis of hollow porous gold nanoparticles with tunable particle size for the reduction of 4-nitrophenol

Guo, Mingzhen; Li, Yan; Ma, Shuang; Sun, Xiaohan

doi:10.1016/j.jhazmat.2016.02.016

Cited by 161 publications

(56 citation statements)

References 52 publications

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“…In addition, the experimental results showed that the LPG 1 presented lower catalytic activity. It appears to be in contrast with the reported phenomena, shown in powder materials . That is, smaller size of catalysts contributed to higher catalytic activity, because of their high catalyst surface areas .…”

Section: Resultscontrasting

confidence: 85%

“…It appears to be in contrast with the reported phenomena, shown in powder materials . That is, smaller size of catalysts contributed to higher catalytic activity, because of their high catalyst surface areas . But, from the kinetic process of the catalytic reduction, it can be observed that the catalytic activity of LPG was controlled by diffusion and the catalyst surface.…”

Section: Resultscontrasting

confidence: 67%

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Synthesis, Microstructure, and Catalytic Performance of Monolithic Low‐Density Porous Au

et al. 2017

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A series of monolithic porous Au with different pore sizes are successfully synthesized by a facile template-dealloying corrosion method. Spherical Cu particles are employed as sacrificial templates, and a FeCl 3 -HNO 3 two-step corrosion method is developed to dissolve the Cu components. The microstructure and phase evolution, as well as the effect of the corrosive media, are investigated in this study. As a result, the prepared monolithic porous Au possesses ultra-low density and a special hollow porous core-shell structure. When a small-sized template (%1 mm) is adopted, the corresponding density is as low as 0.37 g cm À3 (1.8% of the full density of Au). In addition, due to the special structure, the monolithic porous Au exhibits good catalytic performance (K app ¼ 0.43 min À1 ), that is, relatively higher than that of most traditional Au-based powder/slurry materials.

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Section: Resultscontrasting

confidence: 85%

Section: Resultscontrasting

confidence: 67%

Synthesis, Microstructure, and Catalytic Performance of Monolithic Low‐Density Porous Au

et al. 2017

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“…The C t /C 0 ratio is equal to the ratio of the absorbance A t /A 0 at 400 nm, and k corresponds to the rate constant. The well‐fitted linear relationship between ln(C t /C 0 ) versus time t confirmed that the reduction reaction obeyed the pseudo first‐order kinetics (Figure a and Figure b) . The comparative results from Figure b depicted the order of catalytic activity following as H‐ACF‐750 > H‐CACF‐750 > ZTHCMs > H‐LACF‐750, illustrating that H‐ACF‐750 MCs owned the fastest reaction rate and best activity.…”

Section: Resultssupporting

confidence: 55%

Fabrication and characterization of double‐shelled CeO₂‐La₂O₃/Au/Fe₃O₄ hollow architecture as a recyclable and highly thermal stability nanocatalyst

Huang

Fang

Zhang

et al. 2017

Applied Organom Chemis

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A novel magnetic binary‐metal‐oxide‐coated nanocataly composing of a hollow Fe3O4 core and CeO2‐La2O3 shells with Au nanoparticles encapsulated has been created in this work. The structural features of catalysts were characterized by several techniques, including SEM, TEM, UV‐vis, FTIR, XRD, XPS and TGA analyses. After the coating of CeO2‐La2O3 layer, CeO2‐La2O3/Au/C/Fe3O4 microspheres showed a superior thermal stability and catalytic reactivity compared with a pure CeO2 or La2O3 layer. Accompanied by the burning of carbon layer, the specific surface could be increased by the formation of double‐shelled structure. Besides, the desired samples could be separated by magnet, implying the superior recycle performance. Using the reduction of 4‐nitrophenol by NaBH4 as a model reaction, the microspheres exhibited highly reusability, superior catalytic activity, thermal stability, which are attributed to the unique double‐shelled structure of the support, uniform distribution of Au nanoparticles, the highly thermal stability of CeO2‐La2O3 layer and mixed oxide synergistic effect. As a consequence, the unique nanocatalyst will open a promising way in the fabrication of the double‐shelled hollow binary‐metal‐oxide materials for future research and has great potential in other applications.

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“…However, the Au 4f spectra of AuCu/Cu‐SCA and Cu‐SCA are totally different (Figure d). The peaks at 88.0 and 84.3 eV of AuCu/Cu‐SCA correspond to Au 0 species …”

Section: Resultsmentioning

confidence: 99%

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol

Shen

Peng

Song

et al. 2019

Small

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The CO2 reduction reaction (CO2RR) driven by renewable electricity represents a promising strategy toward alleviating the energy shortage and environmental crisis facing humankind. Cu species, as one type of versatile electrocatalyst for the CO2RR, attract tremendous research interest. However, for C2 products, ethanol formation is commonly less favored over Cu electrocatalysts. Herein, AuCu alloy nanoparticle embedded Cu submicrocone arrays (AuCu/Cu‐SCA) are constructed as an active, selective, and robust electrocatalyst for the CO2RR. Enhanced selectivity for EtOH is gained, whose Faradaic efficiency (FE) reaches 29 ± 4%, while ethylene formation is relatively inhibited (16 ± 4%) in KHCO3 aqueous solution. The ratio between partial current densities of EtOH and C2H4 (jEtOH/jC2H4) can be tuned in the range from 0.15 ± 0.27 to 1.81 ± 0.55 by varying the Au content of the electrocatalysts. The combined experimental and theoretical calculation results identify the importance of Au in modifying binding energies of key intermediates, such as CH2CHO*, CH3CHO*, and CH3CH2O*, which consequently modify the activity and selectivity (jEtOH/jC2H4) for the CO2RR. Moreover, AuCu/Cu‐SCA also shows high durability with both the current density and FEEtOH being largely maintained for 24 h electrocatalysis.

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One-step synthesis of hollow porous gold nanoparticles with tunable particle size for the reduction of 4-nitrophenol

Cited by 161 publications

References 52 publications

Synthesis, Microstructure, and Catalytic Performance of Monolithic Low‐Density Porous Au

Synthesis, Microstructure, and Catalytic Performance of Monolithic Low‐Density Porous Au

Fabrication and characterization of double‐shelled CeO₂‐La₂O₃/Au/Fe₃O₄ hollow architecture as a recyclable and highly thermal stability nanocatalyst

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol

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One-step synthesis of hollow porous gold nanoparticles with tunable particle size for the reduction of 4-nitrophenol

Cited by 161 publications

References 52 publications

Synthesis, Microstructure, and Catalytic Performance of Monolithic Low‐Density Porous Au

Synthesis, Microstructure, and Catalytic Performance of Monolithic Low‐Density Porous Au

Fabrication and characterization of double‐shelled CeO2‐La2O3/Au/Fe3O4 hollow architecture as a recyclable and highly thermal stability nanocatalyst

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO2 to Ethanol

Contact Info

Product

Resources

About

Fabrication and characterization of double‐shelled CeO₂‐La₂O₃/Au/Fe₃O₄ hollow architecture as a recyclable and highly thermal stability nanocatalyst

AuCu Alloy Nanoparticle Embedded Cu Submicrocone Arrays for Selective Conversion of CO₂ to Ethanol