Regulation of sulfur doping on carbon-supported Pd particles and abnormal relationship between Pd particle size and catalytic performance in selective hydrogenation of o-chloronitrobenzene

Zhang, Qunfeng; Zhou, Yuan; Xu, Yiqi; Wang, Qingtao; Huang, Wei Min; Ying, Juntao; Zhou, Jing; Ma, Lei; Lu, Chunshan; Feng, Feng; Li, Xiaonian

doi:10.1016/j.catcom.2020.106059

Cited by 16 publications

(4 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Afterward, the resulting powder was washed with deionized (DI) water and dried at 100 °C. The sulfur doping process followed a previously reported work . Typically, a certain amount of Na 2 S·9H 2 O and 2.5 g of activated carbon were added to 10 mL of DI water, and then the mixture was stirred for 12 h. After that, the mixture was dried in a vacuum oven at 110 °C for 6 h. Finally, the dried powder was calcined in N 2 at 600 °C for 3 h with a heating rate of 5 °C min –1 .…”

Section: Methodsmentioning

confidence: 99%

“…The sulfur doping process followed a previously reported work. 27 Typically, a certain amount of Na 2 S• 9H 2 O and 2.5 g of activated carbon were added to 10 mL of DI water, and then the mixture was stirred for 12 h. After that, the mixture was dried in a vacuum oven at 110 °C for 6 h. Finally, the dried powder was calcined in N 2 at 600 °C for 3 h with a heating rate of 5 °C min −1 . The obtained samples were named as SCx, where x represented the mass ratio of the S element.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Boosted H₂O₂ Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H₂ and O₂ at Atmospheric Pressure

Wang

Jiang

Yang

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

It remains a challenge nowadays in the development of highly efficient catalysts for the direct synthesis of H 2 O 2 from H 2 and O 2 . In this work, we developed sulfur-doped carbon-supported Pd catalysts and systematically investigated sulfur effects on catalytic performances through various characterizations (transmission electron microscopy (TEM), N 2 adsorption−desorption, H 2 -temperature-programmed reduction (TPR)/temperature-programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), etc.). Results showed that sulfur species promoted the in situ formation of Pd nanoparticles and enhanced their dispersion on the supports. Due to the synergistic combination of active metal and support, the catalytic performance has been improved significantly in the direct synthesis of H 2 O 2 . The catalyst doped with the highest sulfur content showed the highest H 2 O 2 productivity of 7148 mmol g Pd −1 h −1 , which was nearly 4 times higher than the catalyst without sulfur doping.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Boosted H₂O₂ Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H₂ and O₂ at Atmospheric Pressure

Wang

Jiang

Yang

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…Especially in the o-chloronitrobenzenes (o-CNB) to o-chloroanilines (o-CAN) production, carbon support shows higher transformation activity than the silica or alumina supports [15]. Pd and Pt nanoparticles loaded on the activated carbon show the highest selectivity of o-CAN at the value of 99.9% [16,17]. Except for those noble metals, single cobalt sites in mesoporous N-doped carbon matrix for selective catalytic hydrogenation of o-CNB exhibit higher selectivity of o-CAN at 100% [18].…”

Section: Introductionmentioning

confidence: 99%

Graphene-like wrapped Ni@C catalyst with magnetic recyclability for selective hydrogenation of nitro-aromatics

Tan¹,

Lan²,

Wu³

et al. 2023

Nanotechnology

View full text Add to dashboard Cite

The graphene-like wrapped Ni@C catalysts were facilely synthesized by a modified sol-gel method. Nickel nitrate and citric acid (CA) were adopted as the raw materials to form sol-gel mixture. Under the circumstances, the additive CA were employed not only as a complexing agent but also as a carbon source. It is found that the calcination temperature and the mole ratios between Ni and CA are the key factors affecting the physical property and the catalytic performance of catalysts in the conversion of nitroarenes into corresponding anilines. The results show that the Ni@C-500(1:1) catalyst exhibited the best performance in the hydrogenation of o-chloronitrobenzenes (o-CNB) to o-chloroanilines (o-CAN). The yield of o-CAN was achieved at 100 % when o-CNB was completely converted at 40.0 ℃ under 2.0 MPa H2 for 2.0 hours. Furthermore, the Ni@C-500(1:1) catalyst could be separated and recovered easily after reaction by an external magnetic field. The investigated results indicate that the Ni@C-500(1:1) catalyst remained higher activity after using twelve times. More importantly, this kind of catalyst is also active for the selective hydrogenation of other nitroarenes into the corresponding anilines. This new synthetic method may pave a way for producing low-cost Ni@C catalysts on a large scale, which is attractive for industrial anilines applications.

show abstract

“…On the one hand, this makes sulfur a catalytic poison in many palladium-catalyzed processes [28,29]. On the other hand, recent works have shown that sulfur-doped carbon materials can be effectively used to stabilize palladium particles on a carbon support via stronger bonding [30,31].…”

Section: Introductionmentioning

confidence: 99%

How to Make a Cocktail of Palladium Catalysts with Cola and Alcohol: Heteroatom Doping vs. Nanoscale Morphology of Carbon Supports

et al. 2021

View full text Add to dashboard Cite

Sparkling drinks such as cola can be considered an affordable and inexpensive starting material consisting of carbohydrates and sulfur- and nitrogen-containing organic substances in phosphoric acid, which makes them an excellent precursor for the production of heteroatom-doped carbon materials. In this study, heteroatom-doped carbon materials were successfully prepared in a quick and simple manner using direct carbonization of regular cola and diet cola. The low content of carbon in diet cola allowed reaching a higher level of phosphorus in the prepared carbon material, as well as obtaining additional doping with nitrogen and sulfur due to the presence of sweeteners and caffeine. Effects of carbon support doping with phosphorus, nitrogen and sulfur, as well as of changes in textural properties by ball milling, on the catalytic activity of palladium catalysts were investigated in the Suzuki–Miyaura and Mizoroki–Heck reactions. Contributions of the heteroatom doping and specific surface area of the carbon supports to the increased activity of supported catalysts were discussed. Additionally, the possibility of these reactions to proceed in 40% potable ethanol was studied. Moreover, transformation of various palladium particles (complexes and nanoparticles) in the reaction medium was detected by mass spectrometry and transmission electron microscopy, which evidenced the formation of a cocktail of catalysts in a commercial 40% ethanol/water solution.

show abstract

Regulation of sulfur doping on carbon-supported Pd particles and abnormal relationship between Pd particle size and catalytic performance in selective hydrogenation of o-chloronitrobenzene

Cited by 16 publications

References 33 publications

Boosted H₂O₂ Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H₂ and O₂ at Atmospheric Pressure

Boosted H₂O₂ Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H₂ and O₂ at Atmospheric Pressure

Graphene-like wrapped Ni@C catalyst with magnetic recyclability for selective hydrogenation of nitro-aromatics

How to Make a Cocktail of Palladium Catalysts with Cola and Alcohol: Heteroatom Doping vs. Nanoscale Morphology of Carbon Supports

Contact Info

Product

Resources

About

Regulation of sulfur doping on carbon-supported Pd particles and abnormal relationship between Pd particle size and catalytic performance in selective hydrogenation of o-chloronitrobenzene

Cited by 16 publications

References 33 publications

Boosted H2O2 Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H2 and O2 at Atmospheric Pressure

Boosted H2O2 Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H2 and O2 at Atmospheric Pressure

Graphene-like wrapped Ni@C catalyst with magnetic recyclability for selective hydrogenation of nitro-aromatics

How to Make a Cocktail of Palladium Catalysts with Cola and Alcohol: Heteroatom Doping vs. Nanoscale Morphology of Carbon Supports

Contact Info

Product

Resources

About

Boosted H₂O₂ Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H₂ and O₂ at Atmospheric Pressure

Boosted H₂O₂ Productivity by Sulfur-Doped Pd/Carbon Catalysts via Direct Synthesis from H₂ and O₂ at Atmospheric Pressure