Influence of the postsynthesis preparation procedure on catalytic behaviour of Ag-loaded BEA zeolites in the hydrodechlorination of 1,2-dichloroethane into value added products

Śrębowata, Anna; Baran, Rafał; Słowik, Grzegorz; Lisovytskiy, Dmytro; Dźwigaj, Stanisław

doi:10.1016/j.apcatb.2016.06.060

Cited by 19 publications

(10 citation statements)

References 50 publications

(95 reference statements)

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“…However, palladium NP catalysts also suffer from some persistent difficulties such as oxidation and self-agglomeration that reduces its catalytic activities. 21,22 Thus, it is very important to select a suitable support for palladium NPs to enhance the activity and stability. In earlier literature, the incorporation of metal NPs into porous supports, such as metal-organic frameworks (MOFs), mesoporous materials and zeolites, can be attained by several approaches, including chemical vapor deposition, 23 impregnation method 24,25 and solid grinding.…”

Section: Introductionmentioning

confidence: 99%

Palladium supported on mixed-metal–organic framework (Co–Mn-MOF-74) for efficient catalytic oxidation of CO

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Palladium supported on mixed-metal–organic framework (Co–Mn-MOF-74) for efficient catalytic oxidation of CO

et al. 2021

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“…The conversion at the level of ~ 2% is observed only during the first 3 minutes of the reaction. The catalytic behaviour of red-C-Ag 2.0 Cu 2.0 SiBeta is very similar to that observed for pure red-C-SiBeta and red-C-Cu 2.0 SiBeta catalysts[7] and it is in contrast with the results obtained for monometallic red-C-Ag 2.0 SiBeta catalyst[11]. It means that the coexistence of Cu and Ag does not influent on the increasing of the activity of zeolite materials.…”

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confidence: 78%

“…during hydrodechlorination of 1,2-dichloroethane, as it was reported earlier for silver and copper containing catalysts in HDC process [7,11].…”

Section: Accepted Manuscriptsupporting

confidence: 65%

“…One of them, at 468 K, could be assigned to the reduction of Ag species. This maximum is shifted to higher temperature in comparison with the maximum at 466 K for C-Ag 2.0 HAlBeta[11]. On the other hand, the maximum of the peak at 512 K in case of C-Ag 2.0 Cu 2.0 HAlBeta might be attributed to the reduction of copper species.…”

mentioning

confidence: 72%

“…TPR profile for C-Ag 2.0 Cu 2.0 SiBeta contains six reduction peaks and the TPR profile for C-Ag 2.0 Cu 2.0 HAlBeta contains seven peaks. Comparative study between TPR profiles forC-Ag 2.0 Cu 2.0 SiBeta and C-Ag 2.0 Cu 2.0 HAlBeta zeolites and TPRprofiles for monometallic copper[7] and monometallic silver[11] based on the same zeolite materials (HAlBeta and SiBeta) clearly show an interaction between Ag and Cu. Coexistence of Ag and Cu species leads to the shift of the reduction peaks of silver species toward higher temperatures and copper species toward lower temperatures.…”

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confidence: 86%

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The impact of the hydrodechlorination process on the physicochemical properties of bimetallic Ag-CuBeta zeolite catalysts

Śrębowata

Kamińska

Casale

et al. 2017

Microporous and Mesoporous Materials

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Beta zeolites with two Si/Al ratios of 17 and 1300 were used for synthesis of Ag 2.0 Cu 2.0 HAlBeta and Ag 2.0 Cu 2.0 SiBeta zeolites by conventional wet impregnation and twostep postsynthesis methods, respectively. The calcination of Ag 2.0 Cu 2.0 HAlBeta and Ag 2.0 Cu 2.0 SiBeta at 773 K for 3 h in air led to formation of C-Ag 2.0 Cu 2.0 HAlBeta and C-Ag 2.0 Cu 2.0 SiBeta. After reduction at 873 K for 3 h in flowing 10 % H 2 /Ar, red-C-Ag 2.0 Cu 2.0 HAlBeta and red-C-Ag 2.0 Cu 2.0 SiBeta were obtained and investigated as the catalysts in gas phase hydrodechlorination of 1,2-dichloroethane at atmospheric pressure, at relatively low reaction temperature (523 K). The state of silver and copper in catalysts at different stages of their biography was characterized by low-temperature N 2 sorption, temperatureprogrammed reduction (TPR), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and temperature-programmed hydrogenation (TPH). We have shown that the state of silver and copper species change under HDC conditions. After catalytic run both agglomeration of metal particles and their redispersion took place. According to TPH, XRD and XPS measurements we postulate that the cause of this phenomenon is the formation of chlorine containing species in spent zeolite catalysts.

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Porous carbon‐supported CoPd nanoparticles: High‐performance reduction reaction of nitrophenol

Buğday

Altın

Yaşar

2022

Applied Organom Chemis

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Magnetic porous carbon composite was synthesized from zeolitic imidazolate framework (ZIF‐12) and used as a support material to fabricate CoPd nanoparticles decorated NPC@ZIF‐12 nanocatalyst. The structure of CoPd@NPC@ZIF‐12 has been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray diffraction (XRD), Raman, Brunauer–Emmett–Teller (BET), X‐ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and inductively coupled plasma mass spectrometry (ICP‐MS) techniques. The catalytic reduction reaction of nitrophenols (NP) to aminophenols (AP) was successfully achieved by CoPd@NPC@ZIF‐12 nanocatalyst. When the catalytic performance of the catalyst was compared with other reported catalysts, the performance of the catalyst and reusability was found much better. This better catalytic activity of the CoPd@NPC@ZIF‐12 nanocatalyst may be attributed to facilitating the mass transfer of the nitro compound and the wettability of catalyst caused by the high nitrogen content of the carbon matrix and to the synergistic effect of Co and Pd nanoparticles. The CoPd@NPC@ZIF‐12 nanocatalyst showed perfect catalytic activity in the reduction of 4‐nitrophenol (4‐NP), 3‐nitrophenol (3‐NP), and 2,4‐nitrophenol (2,4‐DNP) reactions with high turnover frequency (TOF) values of 1679, 2687, and 1014 h−1, respectively. The reusability experiments of the CoPd@NPC@ZIF‐12 nanocatalyst showed that the catalytic activity of the CoPd@NPC@ZIF‐12 nanocatalyst was almost retained after 10 consecutive reaction runs. The SEM, XRD, and FTIR analyses of the 10 times used CoPd@NPC@ZIF‐12 nanocatalyst showed that there were limited changes in the structure of the CoPd@NPC@ZIF‐12 nanocatalyst. This highly active, magnetically separable, and recyclable CoPd@NPC@ZIF‐12 catalyst exhibits better catalytic activity than commercial Pd/C catalysts.

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Influence of the postsynthesis preparation procedure on catalytic behaviour of Ag-loaded BEA zeolites in the hydrodechlorination of 1,2-dichloroethane into value added products

Cited by 19 publications

References 50 publications

Palladium supported on mixed-metal–organic framework (Co–Mn-MOF-74) for efficient catalytic oxidation of CO

Palladium supported on mixed-metal–organic framework (Co–Mn-MOF-74) for efficient catalytic oxidation of CO

The impact of the hydrodechlorination process on the physicochemical properties of bimetallic Ag-CuBeta zeolite catalysts

Porous carbon‐supported CoPd nanoparticles: High‐performance reduction reaction of nitrophenol

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