Hydroformylation of olefins catalyzed by single-atom Co(II) sites in zirconium phosphate

Gong, Honghui; Zhao, Xiuge; Qin, Yuxi; Xu, Wen; Wei, Xinjia; Peng, Qingpo; Ma, Yue; Dai, Sheng; An, Pengfei; Hou, Zhenshan

doi:10.1016/j.jcat.2022.03.011

Cited by 36 publications

(28 citation statements)

References 56 publications

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“…As shown in Fig. 7, once CO was absorbed from 3 min to 30 min, the broad bands around 2172 and 2117 cm −1 were observed, which were assigned to the absorption band of the gaseous CO. 52,53 The weak band at 2058 cm −1 was also observed, which was assigned to the adsorption species Co(CO) x according to the previous report. 54,55 However, no peaks corresponding to the carbonyl cobalt species were detected after Ar purging.…”

Section: Resultssupporting

confidence: 67%

Core–shell Co@CoO catalysts for the hydroformylation of olefins

Hou

et al. 2022

New J. Chem.

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Section: Resultssupporting

confidence: 67%

Core–shell Co@CoO catalysts for the hydroformylation of olefins

Hou

et al. 2022

New J. Chem.

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“…It was observed that total acidity of the 1%Pt/ZrP- x increased with the P/Zr ratio between 0.5 and 2 (Figure S12a) but remained unchanged at a higher ratio of P/Zr = 2.5. According to our previous studies, the actual P/Zr ratio of ZrP-2 and ZrP-2.5 was almost the same . It was observed from Figure S12b that the PAP selectivity increased slightly with P/Zr ratio due to a gradual increase of total acidity, but the conversion of NB still remained high on the catalysts.…”

Section: Resultssupporting

confidence: 63%

“…Zirconium phosphate (ZrP) has attracted more and more attention due to its high acid density, large ion exchange capacity, and high thermal stability. These unique properties, coupled with easy preparation and functionalization, made ZrP an attractive candidate material for catalytic application. , As part of our continuous efforts to design easily accessible, cheap, and highly stable ZrP-derived catalysts for catalytic hydrogenation, − in this work, ZrP-supported Pt catalysts demonstrated outstanding catalytic performance for the selective hydrogenation of NB to PAP. The as-prepared catalysts showed full NB conversion and high selectivity to PAP (89%) under very mild reaction conditions (80 °C and 0.6 MPa H 2 ).…”

Section: Introductionmentioning

confidence: 95%

Selective Hydrogenation of Nitrobenzene to para-Aminophenol on a Zirconium-Phosphate-Supported Platinum Catalyst

Zhang

Jiang

Dai

et al. 2023

Ind. Eng. Chem. Res.

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In this work, zirconium-phosphate-supported platinum catalysts have been prepared by a wetness impregnation method and characterized thoroughly by various methods. The 1% Pt/ZrP catalyst displayed superior catalytic performance for the selective hydrogenation of nitrobenzene. It was found that the formation rate of para-aminophenol was much higher than that of aniline over the catalyst in the presence of inorganic acid and DMSO. A full conversion of nitrobenzene and high selectivity to para-aminophenol (89%) were achieved under mild reaction conditions (80 °C, 0.6 MPa H 2 ). Also, the catalyst can be recycled in 14 consecutive catalytic runs without any obvious decrease in activity and selectivity for the hydrogenation of nitrobenzene. The electron transfer interaction of Pt(0) species with zirconium phosphate accounted for the high dispersion and leaching resistance of the Pt sites, leading to excellent recyclability of the catalysts. The further characterization by in situ DRIFT demonstrated that the nitro functional group was dominantly adsorbed on acid sites of zirconium phosphate and reduced to N-phenylhydroxylamine by spillover hydrogen, followed by rearrangement to afford paraaminophenol.

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“…It was seen that the slightly yellow TBA-SiWPd catalyst became black rapidly once the CO atmosphere was introduced to the samples, and the FT-IR spectra of in situ CO adsorption on the TBA-SiWPd catalyst are shown in Figure S5. After adsorbed by CO, the two peaks at 2172 and 2110 cm –1 assigned to the physical absorption of CO were gradually decreased by nitrogen purge . However, the peak at around 1902 cm –1 persisted throughout the adsorption–desorption process, which was assigned to the bridged adsorption of CO on the adjacent Pd(0) species.…”

Section: Resultsmentioning

confidence: 98%

“…After adsorbed by CO, the two peaks at 2172 and 2110 cm −1 assigned to the physical absorption of CO were gradually decreased by nitrogen purge. 48 However, the peak at around 1902 cm −1 persisted throughout the adsorption−desorption process, which was assigned to the bridged adsorption of CO on the adjacent Pd(0) species. This result implied that the partial Pd(II) species in TBA-SiWPd have been reduced and tend to form Pd(0) nanoparticles in the presence of a CO atmosphere.…”

Section: Acs Sustainablementioning

confidence: 99%

Hydrocarboxylation of Olefins Catalyzed by Polyoxometalate-Anchored Palladium Single-Atom Catalysts

Jiang

Wei

et al. 2022

ACS Sustainable Chem. Eng.

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Herein, the Keggin-type polyoxometalate (POM)a n c h o r e d p a l l a d i u m s i n g l e -a t o m c a t a l y s t s [ ( n -C 4 H 9 ) 4 N] 6 [SiW 11 O 39 Pd] and [(n-C 4 H 9 ) 4 N] 5 [PW 11 O 39 Pd] were constructed and employed in the olefin hydrocarboxylation reaction under two-phase conditions. Both the conversion of styrene and the yield of the carboxylic acids can reach as high as 95% at 110 °C. The characterization by high-angle annular darkfield scanning transmission electron microscopy (HAADF-STEM), electrospray ionization mass spectrometry (ESI-MS), and in situ Fourier-transform infrared (FT-IR) spectra of CO adsorption indicated the incorporation of the isolated Pd atom into the POM structure. The POM-anchored Pd catalysts can be directly stored under an ambient atmosphere and easily recovered in consecutive catalytic recycling. Tetrabutylammonium bromide (TBAB) played a crucial role in stabilizing/dispersing the Pd catalyst. Moreover, the catalytic systems showed a unique "pseudo-liquid-phase" behavior and the reactants were absorbed into the flexible POM anions. The catalysts exhibited a wide substrate suitability and have been applied under phosphine ligand-free conditions. The catalytic mechanism studies involving D 2 O showed that the hydrocarboxylation reaction proceeds through the "Pd−H" pathway.

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Hydroformylation of olefins catalyzed by single-atom Co(II) sites in zirconium phosphate

Cited by 36 publications

References 56 publications

Core–shell Co@CoO catalysts for the hydroformylation of olefins

Core–shell Co@CoO catalysts for the hydroformylation of olefins

Selective Hydrogenation of Nitrobenzene to para-Aminophenol on a Zirconium-Phosphate-Supported Platinum Catalyst

Hydrocarboxylation of Olefins Catalyzed by Polyoxometalate-Anchored Palladium Single-Atom Catalysts

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