Revealing Electronic Influences in the Semihydrogenation of Acetylene

Matselko, Oksana; Zimmermann, R.; Ormeci, Alim; Burkhardt, Ulrich; Gladyshevskii, R.; Grin, Yuri; Armbrüster, Marc

doi:10.1021/acs.jpcc.8b05732

Cited by 32 publications

(58 citation statements)

References 34 publications

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“…5). In addition, the observed activity is comparable with the most active sample of the solid solution Ga 1-x Sn x Pd 2 [2]. These findings correlate with the geometric and electronic models for semi-hydrogenation of acetylene [34].…”

Section: Catalytic Propertiessupporting

confidence: 69%

“…Taking into account the properties of GaPd 2 [1] and Ga 1-x Sn x Pd 2 [2], the solid solution Ga 1-x Sb x Pd 2 (sample with nominal composition Ga 28.3 Sb 5 Pd 66.7 ) was chosen to test its catalytic properties in the semihydrogenation of acetylene.…”

Section: Catalytic Propertiesmentioning

confidence: 99%

“…The catalytic properties of Ga-Pd intermetallic compounds [1] and recent investigations of Ga-Sn-Pd phases [2,3] make the ternary systems of gallium with metals/semimetals of the groups 13-15 of the periodic table (M) and platinum metals (T) attractive for the search for new catalytic materials. The systems Ga-M-T have not been thoroughly investigated (Table 1, [4]).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The ternary systems Al–Ga–Pd and Ga–Sb–Pd. Search for new catalytic materials

Matselko¹,

Burkhardt²,

Grin³

et al. 2018

Chem. Met. Alloys

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The phase relations in the Pd-rich region (≥ 50 at.% Pd) of the ternary systems AlGa -Pd at 600°C and Ga-Sb-Pd at 500°C have been investigated by means of X-ray powder diffraction and EDX analysis. Four continuous substitutional solid solutions were found in the AlGa -Pd system: Al 1-x Ga x Pd (FeSi-type structure, space group P2 1 3, Pearson symbol cP8), (Al 1-x Ga x) 3 Pd 5 (Rh 5 Ge 3-type structure, space group Pbam, Pearson symbol oP16), Al 1-x Ga x Pd 2 (Co 2 Si-type structure, space group Pnma, Pearson symbol oP12), (Al 1-x Ga x) 2 Pd 5 (Pd 5 Ga 2-type structure, space group Pnma, Pearson symbol oP28). In the Pd-rich part of the Ga-Sb-Pd system, three new ternary phases were revealed: Ga 1-x Sb x Pd 2 (Fe 2 P-type structure, space group P-62m, Pearson symbol hP9) and two tetragonal phases with approximate compositions close to Ga 0.5 Sb 0.5 Pd 3 , one of which crystallizes with Pt 3 Ga-type structure (space group P4/mbm, Pearson symbol tP16). The existence of the previously reported phase Ga 4.5 Sb 4.5 Pd 25 was confirmed. The isothermal sections were constructed for the Pd-rich regions of both systems. The catalytic properties of the sample Ga 28.3 Sb 5 Pd 66.7 were investigated for semi-hydrogenation of acetylene.

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Section: Catalytic Propertiessupporting

confidence: 69%

Section: Catalytic Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The ternary systems Al–Ga–Pd and Ga–Sb–Pd. Search for new catalytic materials

Matselko¹,

Burkhardt²,

Grin³

et al. 2018

Chem. Met. Alloys

Self Cite

View full text Add to dashboard Cite

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“…Intermetallic compounds have been applied in an unsupported and supported state to systematically investigate ligand and geometric effects as well as the influence of the support – in recent years especially in the semi-hydrogenation of acetylene [ 35 , 36 ], methanol synthesis [ 37 ] and methanol steam reforming [ 38 ]. Due to their electrical conductivity, intermetallic compounds are also applicable in the field of electrocatalysis, enhancing the combined experimental and quantum chemical approach summarised by Jaramillo et al [ 39 ] Controlled leaching [ 40 ] and development of electrodes with higher stability [ 41 ] based on the Brewer-Engel bonding theory [ 42 ] are just two examples.…”

Section: Catalysis and Intermetallic Compoundsmentioning

confidence: 99%

Intermetallic compounds in catalysis – a versatile class of materials meets interesting challenges

Armbrüster

2020

Science and Technology of Advanced Materials

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The large and vivid field of intermetallic compounds in catalysis is reviewed to identify necessities, strategies and new developments making use of the advantageous catalytic properties of intermetallic compounds. Since recent reviews summarizing contributions in heterogeneous catalysis as well as electrocatalysis are available, this contribution is not aiming at a comprehensive literature review. To introduce the field, first the interesting nature of intermetallic compounds is elaboratedincluding possibilities as well as requirements to address catalytic questions. Subsequently, this review focuses on exciting developments and example success stories of intermetallic compounds in catalysis. Since many of these are based on recent advances in synthesis, a short overview of synthesis and characterisation is included. Thus, this contribution aims to be an introduction to the newcomer as well as being helpful to the experienced researcher by summarising the different approaches. Selected examples from literature are chosen to illustrate the versatility of intermetallic compounds in heterogeneous catalysis where the emphasis is on developments since the last comprehensive review in the field.

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“…[4] The above-mentioned characteristic properties of intermetallic compounds ensure a reproducibility of defined surface structures and thus a direct correlation between the catalytic behavior and the crystal and/or electronic structure of an intermetallic compound. [5] The formation of partially very broad homogeneity ranges of the intermetallic compounds (realized by substitution, filling of interstitial spaces of the surplus type of atom or by voids of the subordinate type of atom) also offer the possibility of changing the electronic structure of an intermetallic compound while largely retaining the geometric structure, whereby a separate analysis of the influence by changing the electronic structure of an intermetallic compound becomes accessible. The enormous potential of intermetallic compounds for knowledge-based catalysis research is illustrated by examples such as the development of non-precious metal catalyst materials for the semi-hydrogenation of acetylene, [6] the development of stable and highly active catalysts for methanol steam reforming (MSR) [7] as well as their broad use in electrocatalysis.…”

Section: Introductionmentioning

confidence: 99%

Corrosion‐Free EMF Measurements of Zinc‐Based Intermetallic Compounds at Ambient Temperature

Kriegel

Armbrüster

2020

ChemPhysChem

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Material development requires in many cases information about the necessary stability of the materials against oxidation, which is encoded in the chemical activity of the constituting elements. Determination of the chemical activity is tedious, especially for metallic materials at or close to ambient temperature. To determine the chemical activity of Zn at ambient temperature, electromotive force (EMF) measurements on the intermetallic compounds ZnPd, ZnPt and Cu 5 Zn 8 within their respective homogeneity range were conducted. The single-phase nature of the samples was confirmed by powder X-ray diffraction, light microscopy as well as SEM/EDX analysis. To exclude oxidation, and therefore faulty determination of the electrochemical potentials, a method was developed to conduct the electro-chemical measurements under non-corrosive conditions in inert atmosphere. Corrosion by the electrolyte was avoided using anhydrous dimethylformamide as aprotic solvent. From the EMF the respective intrinsic activities of zinc in the corresponding intermetallic compounds was determined. Measurements on Cu 5 Zn 8 and comparison to available data in literature verified the developed method allowing to retrieve thermodynamic data of ZnPd and ZnPt for the first time at ambient temperature. The herein developed and easy-to-use methodology is applicable to a wide range of metallic material by choosing appropriate compositions of the electrolyte and has the potential to boost material development.[a] Dr.

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Revealing Electronic Influences in the Semihydrogenation of Acetylene

Cited by 32 publications

References 34 publications

The ternary systems Al–Ga–Pd and Ga–Sb–Pd. Search for new catalytic materials

The ternary systems Al–Ga–Pd and Ga–Sb–Pd. Search for new catalytic materials

Intermetallic compounds in catalysis – a versatile class of materials meets interesting challenges

Corrosion‐Free EMF Measurements of Zinc‐Based Intermetallic Compounds at Ambient Temperature

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