Pulsed electrodeposited dendritic Pd-Ni alloy as a magnetically recoverable nanocatalyst for the hydrogenation of 4-nitrophenol

Revathy, T.A.; Dhanapal, K.; Dhanavel, S.; Narayanan, Vijaykrishnan

doi:10.1016/j.jallcom.2017.11.264

Cited by 36 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It needs to be mentioned that the catalytic reduction activity of eHA@α-Ni(OH) 2 -B is higher than that of some reported transitionalmetal-based catalysts and even noble-metal-based catalysts (rows 15−20 in Table 1). 13,43−46 For example, the K values of Pd−Ni alloy- 45 and Pt@Ag NPs 13 -catalyzed 4-NP reduction are, respectively, 45.85 and 118.33 s −1 •g −1 , which are lower than those for the eHA@α-Ni(OH) 2 -B-catalyzed 4-NP reduction. Moreover, the catalytic reduction activity of eHA@α-Ni(OH) 2 -B is also higher than that of the Ni-based catalyst, and as an example, α-Ni(OH) 2 composed of nanosheets intercalated by propylene glycol molecules 31 presents a K value of 216.69 s…”

Section: Catalytic Reductionmentioning

confidence: 99%

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)₂

Quan

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

A series of supported α-Ni(OH) 2 structures on etched halloysite nanotubes (eHAs) are synthesized via a one-pot facile co-precipitation method. By expediently controlling the variety of alkali source, etched halloysite nanotubes@α-Ni(OH) 2 (eHA@α-Ni(OH) 2 ) with different α-Ni(OH) 2 morphologies and Ni 2+ -ion contents can be achieved. The prepared eHA@α-Ni(OH) 2 is used to catalytically reduce 4-nitrophenol (4-NP). It shows that eHA@α-Ni(OH) 2 prepared with n-butylamine as an alkali source (eHA@α-Ni(OH) 2 -B) exhibits a higher k app of 1.458 × 10 −2 s −1 and K of 583.27 s −1 •g −1 . The catalytic reduction property is in accordance with the Ni 2+ -ion content of eHA@α-Ni(OH) 2 . Moreover, it also exhibits a good cycle stability due to the synergy of the support eHA and the supported Ni 2+ ions in α-Ni(OH) 2 , which can achieve a 99% 4-nitrophenol conversion after 11 cycles. The Ni 2+ -ion reduction experiment illustrates that the Ni 2+ ion is the activation site and the enhanced 4-NP reduction activity of eHA@α-Ni(OH) 2 -B is attributed to the higher Ni 2+ -ion content, which accelerates the electron transport from NaBH 4 to 4-NP to result in the catalytic reduction of 4-NP to 4-aminophenol (4-AP).

show abstract

Section: Catalytic Reductionmentioning

confidence: 99%

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)₂

Quan

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…The catalytic activity of CMPA-3-0.7 for 4-NP reduction was comparable to and even outperformed some transition metal and noble metal-based catalysts (lines 13–17 in Table ). − For example, K for MnO@Al 2 O 3 @C/Ni-700, SiO 2 @C-Ni, Au@CMK-3-O, Ag@Pt nanoparticles and Pd–Ni alloy catalyzing 4-NP reduction were 13.7, 37, 0.0065, 118.3 and 45.85 s –1 g –1 , respectively. All of these values were lower than the value obtained from CMPA-3-0.7 catalyzing 4-NP reduction, even though our reaction system had a higher concentration of 4-NP per unit mass of catalyst compared to the majority of other catalytic systems.…”

Section: Resultsmentioning

confidence: 99%

Self-Healing Conjugated Microporous Polyanilines for Effective and Continuous Catalytic Detoxification of 4-Nitrophenol to 4-Aminophenol

Gao,

Jiang,

Zhang

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Detoxification of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with high efficiency and dynamic performance is challenging for a polymeric catalyst. Herein, a series of conjugated microporous polyanilines (CMPAs), capable of efficiently catalytically reducing 4-NP, were synthesized based on the Buchwald−Hartwig cross-coupling reaction mechanism. By adjusting the types of linkers and the molar ratios of linker to core, CMPAs with different Brunauer−Emmett−Teller (BET) specific surface areas and reduction degrees were obtained and used as the catalysts in reducing 4-NP. The ultrahigh catalytic reduction efficiency (K = 141.32 s −1 g −1 , k app = 0.00353 s −1 ) was achieved when using CMPA-3-0.7 as the catalyst (prepared with 4,4′-diaminodiphenylamine as the linker and a 0.7:1 molar ratio of linker to core). The catalytic reduction performance exhibited a strong correlation with the reduction degree and BET specific surface area of CMPAs. Furthermore, they also exhibit excellent cycling stability and dynamic performance. The coexistence of a microporous structure and high BET specific surface area endowed CMPAs with an increased number of catalytic active centers. The reversible redox transformation of CMPAs in the presence of NaBH 4 and air enabled selfhealing (the oxidation units in CMPAs were reduced to reduction units by NaBH 4 , and the newly generated reduction unit in CMPAs was subsequently oxidized to its original state by the O 2 in the air), leading to the reduction reaction of 4-NP proceeded continuously and stably. The aforementioned factors resulted in the high efficiency of CMPAs for reducing 4-NP to 4-AP, enhancing the practical application prospects of CMPAs in the detoxification of 4-NP wastewater.

show abstract

“…The reduction of 4-NP to 4-AP was chosen as a model reaction. 4-NP as a priority control pollutant is harmful to human health and ecological environment, 34,35 while the reduction product 4-AP has low toxicity, easy to degrade, and is also a key intermediate for the synthesis of antipyretic analgesics. 36 Therefore, the conversion of 4-NP to 4-AP not only realizes the degradation of 4-NP, but also effectively synthesizes 4-AP.…”

Section: Resultsmentioning

confidence: 99%

Construction of stable bio-Pd catalysts for environmental pollutant remediation

et al. 2021

View full text Add to dashboard Cite

show abstract

Pulsed electrodeposited dendritic Pd-Ni alloy as a magnetically recoverable nanocatalyst for the hydrogenation of 4-nitrophenol

Cited by 36 publications

References 47 publications

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)₂

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)₂

Self-Healing Conjugated Microporous Polyanilines for Effective and Continuous Catalytic Detoxification of 4-Nitrophenol to 4-Aminophenol

Construction of stable bio-Pd catalysts for environmental pollutant remediation

Contact Info

Product

Resources

About

Pulsed electrodeposited dendritic Pd-Ni alloy as a magnetically recoverable nanocatalyst for the hydrogenation of 4-nitrophenol

Cited by 36 publications

References 47 publications

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)2

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)2

Self-Healing Conjugated Microporous Polyanilines for Effective and Continuous Catalytic Detoxification of 4-Nitrophenol to 4-Aminophenol

Construction of stable bio-Pd catalysts for environmental pollutant remediation

Contact Info

Product

Resources

About

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)₂

Effective Catalytic Reduction of 4-Nitrophenol to 4-Aminophenol over Etched Halloysite Nanotubes@α-Ni(OH)₂