Selective oxidation of glycerol to dihydroxyacetone over N-doped porous carbon stabilized CuxO supported Au catalysts

Tan, Hua; Yao, Chaojian; Zhan, Tong; Li, Wenqiong; Zhu, Jianzhong; Wang, Gang; Liu, Weibing; Sun, Mingtai; Wang, Suhua

doi:10.1016/j.mcat.2020.111243

Cited by 9 publications

(7 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The recyclability of the Au/LPrO catalyst was tested in a recycling experiment for five runs (Figure D). Although the GLY conversion drops from 65.8 to 47.0%, the loss (18.8%) in glycerol conversion is still smaller than those (22–72%) of the previously reported Au/CuO, Au/TiO 2 , Au/SiO 2 , and Au/AC catalysts, indicating the better durability of the Au/LPrO catalyst (Table S7). Besides, ICP analysis proves that almost no detectable Pr element has leached into the reaction solution after catalytic reaction (Table S8), further confirming the high stability of the Au/LPrO catalyst.…”

Section: Results and Discussionmentioning

confidence: 65%

Gold Nanoparticles on Nanosheets Derived from Layered Rare-Earth Hydroxides for Catalytic Glycerol-to-Lactic Acid Conversion

Wang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Layered rare-earth hydroxides (LREHs), as a series of special lamellar compounds having a similar structure to layered double hydroxides (LDHs), are becoming a new type of catalyst materials. In this study, we have prepared a series of uniform LREH (RE = Y, La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm) nanosheets through a reverse-microemulsion method. After deposition–precipitation of HAuCl4 and calcination, supported Au catalysts (denoted as Au/LREO) were subsequently obtained. The catalytic properties of all the derived Au/LREO catalysts were evaluated by aerobic conversion of glycerol to lactic acid under mild conditions (90 °C, 1 atm). Among these catalysts, Au/LPrO displays the best performances, including the highest glycerol conversion, lactic acid, and C3 product selectivity. Both the catalytic activities and the characterizations of the structure of Au/LREO indicate that the kind of rare-earth ions plays a key role in determining the Au particle size and its valence state and reducibility, which are the important factors correlated with the catalytic activities in glycerol conversion. In fact, the three features of gold particles, the extra-small size (∼3 nm), high content of Au0 species, and high reducibility, are the essential prerequisites for achieving the superior catalytic performance of Au/LPrO.

show abstract

Section: Results and Discussionmentioning

confidence: 65%

Gold Nanoparticles on Nanosheets Derived from Layered Rare-Earth Hydroxides for Catalytic Glycerol-to-Lactic Acid Conversion

Wang

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…It is yet difficult to differentiate the Cu + species from Cu 0 by the Cu 2p peak, as they respond at similar binding energies. To determine the valence state of the Cu species, we further analyzed the Auger electron kinetic energy of Cu elements. , In the Auger electron spectrum of CuO-NaOH-R (Figure b), there is a characteristic peak (918.9 eV), the value of which is higher than 918.6 eV (Cu 0 Auger electron kinetic energy), proving the generation of Cu 0 species on the surface of the CuO-NaOH-R sample after the reaction.…”

Section: Resultsmentioning

confidence: 99%

Surface/Lattice Oxygen Synergism of Durable CuO Catalysts for Tandem Dehydrogenation–Oxidation of Glycerol to Carboxylic Acids in Oxygen-Free Medium

Wang

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Catalytic dehydrogenation–oxidation of bio-oxygenates to carboxylic acids and green H2 has been considered a key technology for biorefineries. Composition, size, and morphology are critical parameters for solid catalysts. However, the synergism of surface/lattice oxygen in inexpensive metal oxide catalysts is largely unexplored in this area. In this work, a systematic study on the surface/lattice oxygen synergism of crystallized CuO catalysts has been performed using glycerol dehydrogenation as an example. The key finding is that surface oxygen contributes to enhanced C–H bond activation, while lattice oxygen is key for tandem dehydrogenation–oxidation reactions. Thus, the crystallized CuO catalysts display a 2-fold enhancement in activity and 7-fold improvement in the durability of CuO catalysts, leading to almost 93% reduction of Cu leaching with negligible deactivation. The methodology discussed in this work will provide insights into the rational design of cost-effective CuO materials for other important aqueous dehydrogenation reactions in the chemical industry.

show abstract

“…Ni@NC catalysts were synthesized based on our previous work. 33,34 Briey, 1.0 g F127 and 2.0 g of dicyandiamide (DCDA) were rst dissolved in a mixture of ethanol (20.0 g) and deionized (DI) water (10.0 g), and then 0.75 g of nickel nitrate hexahydrate and 5.0 g of resol ethanol solution (20 wt%) were added to the above solution. Aer stirring for 0.5 h, the nal solution was put into a drying oven and the solvent was evaporated at 50 C for 6 h, followed by 100 C for 24 h. The obtained composites were calcined in a tubular furnace under N 2 at 350 C for 3 h and then at 600 or 800 C for another 3 h with a heating rate of 3 C min À1 .…”

Section: Catalyst Preparationmentioning

confidence: 99%

Facile preparation of N-doped graphitic carbon encapsulated nickel catalysts for transfer hydrogenolysis of lignin β-O-4 model compounds to aromatics

Tan

et al. 2022

Sustainable Energy Fuels

Self Cite

View full text Add to dashboard Cite

show abstract

Selective oxidation of glycerol to dihydroxyacetone over N-doped porous carbon stabilized CuxO supported Au catalysts

Cited by 9 publications

References 66 publications

Gold Nanoparticles on Nanosheets Derived from Layered Rare-Earth Hydroxides for Catalytic Glycerol-to-Lactic Acid Conversion

Gold Nanoparticles on Nanosheets Derived from Layered Rare-Earth Hydroxides for Catalytic Glycerol-to-Lactic Acid Conversion

Surface/Lattice Oxygen Synergism of Durable CuO Catalysts for Tandem Dehydrogenation–Oxidation of Glycerol to Carboxylic Acids in Oxygen-Free Medium

Facile preparation of N-doped graphitic carbon encapsulated nickel catalysts for transfer hydrogenolysis of lignin β-O-4 model compounds to aromatics

Contact Info

Product

Resources

About