Standard thermodynamic functions of Co2+ complexation with glycine and L-histidine in aqueous solution

Gorboletova, G. G.; Metlin, A. A.

doi:10.1134/s0036024416010118

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…As reported in the literature [ 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 ], the chelate-assisted method has been widely used to improve the dispersion of metal for supported catalysts. In our previous work, Co/SiO 2 catalysts with nanosized and homogenous size distributions of Co can be prepared by the thermal decomposition of Co(II)-glycine complexes prepared by the reaction of glycine with cobalt hydroxide [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

Physical Grinding of Prefabricated Co3O4 and MCM-22 Zeolite for Fischer–Tropsch Synthesis: Impact of Pretreatment Procedure on the Dispersion and Catalytic Performance

Ren,

Xie,

Tian

et al. 2024

Molecules

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To improve the mess-specific activity of Co supported on zeolite catalysts in Fischer–Tropsch (FT) synthesis, the Co-MCM-22 catalyst was prepared by simply grinding the MCM-22 with nanosized Co3O4 prefabricated by the thermal decomposition of the Co(II)-glycine complex. It is found that this novel strategy is effective for improving the mess-specific activity of Co catalysts in FT synthesis compared to the impregnation method. Moreover, the ion exchange and calcination sequence of MCM-22 has a significant influence on the dispersion, particle size distribution, and reduction degree of Co. The Co-MCM-22 prepared by the physical grinding of prefabricated Co3O4 and H+-type MCM-22 without a further calcination process exhibits a moderate interaction between Co3O4 and MCM-22, which results in the higher reduction degree, higher dispersion, and higher mess-specific activity of Co. Thus, the newly developed method is more controllable and promising for the synthesis of metal-supported catalysts.

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Section: Introductionmentioning

confidence: 99%

Physical Grinding of Prefabricated Co3O4 and MCM-22 Zeolite for Fischer–Tropsch Synthesis: Impact of Pretreatment Procedure on the Dispersion and Catalytic Performance

Ren,

Xie,

Tian

et al. 2024

Molecules

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“…The essence of this approach is to replace the H 2 O ligand in the [Co(H 2 O) 6 (NO 3 ) 2 ] by organic ligand to form multidentate chelated Co ions [Co(ligand) x (H 2 O) 6−x ] 2+ through successive complexation reactions. Thus, in the impregnation solution, the structures and coordination features of the complexes are diverse [21,22]. Moreover, it has been proved that only a part of Co 2+ in the impregnation solution participated in the complex formation with chelate agents [10,14], which is influenced by the ratio of the chelating agent to metal and the pH of the solution.…”

Section: Introductionmentioning

confidence: 99%

Impact of Coordination Features of Co(II)-Glycine Complex on the Surface Sites of Co/SiO2 for Fischer–Tropsch Synthesis

Hao

Xie

et al. 2020

Catalysts

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To investigate the effect of coordination features of Co(II)-glycine complex on the performance of Co/SiO2 for Fischer–Tropsch (FT) synthesis, Co(II)-glycine complex precursors were prepared by the conventional method, i.e., simply adding glycine to the solution of Co nitrate and novel route, i.e., reaction of glycine with cobalt hydroxide. The SiO2-supported Co catalysts were prepared by using the different Co(II)-glycine complexes. It is found that glycine is an effective chelating agent for improving the dispersion of Co and the mass-specific activity in FT synthesis when the molar ratio of glycine/Co2+ = 3, which is independent to the preparation method in this study. Significantly, the surface Co properties were significantly influenced by the coordination features of the Co2+ and the molar ratio of glycine to Co2+ in the Co(II)-glycine complex. Specifically, the Co(3gly)/SiO2 catalyst prepared by the novel route exhibits smaller and homogenous Co nanoparticles, which result in improved stability compared to Co-3gly/SiO2 prepared by the conventional method. Thus, the newly developed method is more controllable and promising for the synthesis of Co-based catalysts for FT synthesis.

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Thermodynamics of Complexation of Triglycine with Cobalt(II) in Aqueous Solutions

Gorboletova

Bychkova

Frolova

2020

Russ. J. Phys. Chem.

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Standard thermodynamic functions of Co2+ complexation with glycine and L-histidine in aqueous solution

Cited by 5 publications

References 3 publications

Physical Grinding of Prefabricated Co3O4 and MCM-22 Zeolite for Fischer–Tropsch Synthesis: Impact of Pretreatment Procedure on the Dispersion and Catalytic Performance

Physical Grinding of Prefabricated Co3O4 and MCM-22 Zeolite for Fischer–Tropsch Synthesis: Impact of Pretreatment Procedure on the Dispersion and Catalytic Performance

Impact of Coordination Features of Co(II)-Glycine Complex on the Surface Sites of Co/SiO2 for Fischer–Tropsch Synthesis

Thermodynamics of Complexation of Triglycine with Cobalt(II) in Aqueous Solutions

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