Effect of ordered and disordered phases of unsupported Ag3In nanoparticles on the catalytic reduction of p-nitrophenol

Sarkar, Sumanta; Balisetty, Lahari; Shanbogh, Pradeep P.; Peter, Sebastian C.

doi:10.1016/j.jcat.2014.07.018

Cited by 20 publications

(16 citation statements)

References 64 publications

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“…Several bimetallic systems offer such transitions, among them Ag-In at the 3:1 ratio and Cu-Pd at the 1:1 ratio. Such Ag-In materials (ordered: Cu 3 Au type of crystal structure; disordered: Cu type of crystal structure) have been applied to test for structural influences on the reduction rate of para-nitrophenol to para-aminophenol using NaBH 4 as reduction agent[ 118 ]. The higher the structural order, the slower the reaction proceeds.…”

Section: Addressing Catalytic Challengesmentioning

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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Section: Addressing Catalytic Challengesmentioning

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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“…In our previous works, NiSb/SBA-15, NiSe, NiSb, CoSb, Ag3In and PdCu IMCs synthesized by various methods and studied as active catalysts for the hydrogenation of pnitrophenol and oxidation of benzylamine, respectively. 28,[36][37][38][39] Apart from this we also developed other ordered IMCs PdCu3, Pd2Ge, Pd3Pb, Pt2In3 and PdRE as efficient catalysts for energy conversion in fuel cell. [40][41][42][43][44] In continuation of our investigation for the synthesis of IMCs for organic catalysis, we have successfully synthesized the pure phase of NixSny IMCs (Ni1.5Sn, Ni3Sn, Ni3Sn2, Ni3Sn4) well separated by the Al2O3 matrix through LDH route.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Role of Atomic Ordering in the Crystal Structures of Ni_xSn_y toward Efficient Vapor Phase Furfural Hydrogenation

Marakatti

Arora

Rai

et al. 2018

ACS Sustainable Chem. Eng.

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In this work, we have synthesized ordered NixSny nanoparticles separated by Al2O3 as highly efficient catalysts for the vapor phase hydrogenation of furfural. The NixSny-Al2O3 composite catalysts with different chemical compositions (Ni3Sn4, Ni3Sn, Ni1.5Sn, Ni3Sn2, Ni) were prepared through layered double hydroxide (LDH) route by annealing at 800 °C in presence of H2. NixSny nanoparticles were well dispersed throughout the Al2O3 matrix indicating the high thermal stability of these materials. The effect of different concentration of Ni, Sn and Al in the formation of NixSny-Al2O3 catalyst was investigated. The XRD, TEM and XAFS analyses indicate the formation of intermetallic phases with spherical particle having average size of 30-160 nm. The nanoparticles with different compositions were tested towards the hydrogenation of furfural and found that crystal structure, atomic ordering and composition play crucial roles in the catalytic activity. DFT calculations indicate the adsorption energy and the geometrical orientation of furfural on the surface of different NixSny-Al2O3 compounds play crucial role in the hydrogenation of furfural. Ni3Sn2-Al2O3 was found to be most efficient catalyst with high furfural conversion (~ 65 %) and selectivity (57-62 %) for furfuryl alcohol.

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“…Therefore, the ordered structure should be treated under the order–disorder transformation temperature, and the disordered structure should be obtained above the temperature. Ordered superstructures are traditionally considered to be more catalytically active, [ 148,149 ] while they are not easy to maintain due to the significantly reduced order–disorder transformation temperature driven by the strong surface tension.…”

Section: Restructuringmentioning

confidence: 99%

Nanometal Thermocatalysts: Transformations, Deactivation, and Mitigation

Zhang

Pan

Zhou

et al. 2021

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Nanometals have been proven to be efficient thermocatalysts in the last decades. Their enhanced catalytic activity and tunable functionalities make them intriguing candidates for a wide range of catalytic applications, such as gaseous reactions and compound synthesis/decomposition. On the other hand, the enhanced specific surface energy and reactivity of nanometals can lead to configuration transformation and thus catalytic deactivation during the synthesis and catalysis, which largely undermines the activity and service time, thereby calling for urgent research effort to understand the deactivating mechanisms and develop efficient mitigating methods. Herein, the recent progress in understanding the configuration transformation‐induced catalytic deactivation within nanometals is reviewed. The major pathways of configuration transformations, and their kinetics controlled by the environmental factors are presented. The approaches toward mitigating the transformation‐induced deactivation are also presented. Finally, a perspective on the future academic approaches toward in‐depth understanding of the kinetics of the deactivation of nanometals is proposed.

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Effect of ordered and disordered phases of unsupported Ag3In nanoparticles on the catalytic reduction of p-nitrophenol

Cited by 20 publications

References 64 publications

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

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

Understanding the Role of Atomic Ordering in the Crystal Structures of Ni_xSn_y toward Efficient Vapor Phase Furfural Hydrogenation

Nanometal Thermocatalysts: Transformations, Deactivation, and Mitigation

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Effect of ordered and disordered phases of unsupported Ag3In nanoparticles on the catalytic reduction of p-nitrophenol

Cited by 20 publications

References 64 publications

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

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

Understanding the Role of Atomic Ordering in the Crystal Structures of NixSny toward Efficient Vapor Phase Furfural Hydrogenation

Nanometal Thermocatalysts: Transformations, Deactivation, and Mitigation

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Understanding the Role of Atomic Ordering in the Crystal Structures of Ni_xSn_y toward Efficient Vapor Phase Furfural Hydrogenation