Critical Review of Low-Temperature CO Oxidation and Hysteresis Phenomenon on Heterogeneous Catalysts

Soubaihi, Rola Mohammad Al; Saoud, Khaled; Dutta, Joydeep

doi:10.3390/catal8120660

Cited by 83 publications

(47 citation statements)

References 135 publications

(232 reference statements)

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“…The selective oxidation of carbon monoxide with low concentration of O 2 (CO-PROX) is used to purify hydrogen rich streams obtained from hydrocarbon reforming. So far, the most studied and active system are the CuO–CeO 2 and Pt based catalyst [61].…”

Section: Transition Metal Nitrides As Catalystmentioning

confidence: 99%

Recent Progress on Transition Metal Nitrides Nanoparticles as Heterogeneous Catalysts

Dongil

2019

Nanomaterials

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This short review aims at providing an overview of the most recent literature regarding transition metal nitrides (TMN) applied in heterogeneous catalysis. These materials have received renewed attention in the last decade due to its potential to substitute noble metals mainly in biomass and energy transformations, the decomposition of ammonia being one of the most studied reactions. The reactions considered in this review are limited to thermal catalysis. However the potential of these materials spreads to other key applications as photo- and electrocatalysis in hydrogen and oxygen evolution reactions. Mono, binary and exceptionally ternary metal nitrides have been synthetized and evaluated as catalysts and, in some cases, promoters are added to the structure in an attempt to improve their catalytic performance. The objective of the latest research is finding new synthesis methods that allow to obtain smaller metal nanoparticles and increase the surface area to improve their activity, selectivity and stability under reaction conditions. After a brief introduction and description of the most employed synthetic methods, the review has been divided in the application of transition metal nitrides in the following reactions: hydrotreatment, oxidation and ammonia synthesis and decomposition.

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Section: Transition Metal Nitrides As Catalystmentioning

confidence: 99%

Recent Progress on Transition Metal Nitrides Nanoparticles as Heterogeneous Catalysts

Dongil

2019

Nanomaterials

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“…The 3D mapping of the energy landscape unveils the dynamics of AuNP1 showing a distinct behaviour in strain energy between the heating and cooling steps of the CO oxidation reaction. Although the hysteresis behaviour during oxidation reaction is expected from a macroscopic point of view (catalytic conversion) 36 , it turns out to be at the single-particle level. This is surprising and could be explained by taking into account losses in the form of irreversible elastic energy release via lattice deformation and heat dissipation due to the exothermicity of the reaction.…”

Section: Resultsmentioning

confidence: 99%

Three-dimensional strain dynamics govern the hysteresis in heterogeneous catalysis

et al. 2020

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Understanding catalysts strain dynamic behaviours is crucial for the development of cost-effective, efficient, stable and long-lasting catalysts. Here, we reveal in situ three-dimensional strain evolution of single gold nanocrystals during a catalytic CO oxidation reaction under operando conditions with coherent X-ray diffractive imaging. We report direct observation of anisotropic strain dynamics at the nanoscale, where identically crystallographically-oriented facets are qualitatively differently affected by strain leading to preferential active sites formation. Interestingly, the single nanoparticle elastic energy landscape, which we map with attojoule precision, depends on heating versus cooling cycles. The hysteresis observed at the single particle level is following the normal/inverse hysteresis loops of the catalytic performances. This approach opens a powerful avenue for studying, at the single particle level, catalytic nanomaterials and deactivation processes under operando conditions that will enable profound insights into nanoscale catalytic mechanisms.

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“…Low-temperature CO oxidation to CO 2 is a catalytic reaction that is considered a "probe" or model reaction for other oxidation reactions and has essential applications in emission abatement [76]. In the near-50 years that this reaction has been studied, supported noble metals are among the most efficient reported catalysts [77]. For Pt catalysts, it has been established that interactions of this metal with the support can significantly alter the metal's electronic properties and, consequently, the catalytic properties.…”

Section: Oxidation Reactionsmentioning

confidence: 99%

Designing Nanoparticles and Nanoalloys for Gas-Phase Catalysis with Controlled Surface Reactivity Using Colloidal Synthesis and Atomic Layer Deposition

et al. 2020

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Supported nanoparticles are commonly applied in heterogeneous catalysis. The catalytic performance of these solid catalysts is, for a given support, dependent on the nanoparticle size, shape, and composition, thus necessitating synthesis techniques that allow for preparing these materials with fine control over those properties. Such control can be exploited to deconvolute their effects on the catalyst’s performance, which is the basis for knowledge-driven catalyst design. In this regard, bottom-up synthesis procedures based on colloidal chemistry or atomic layer deposition (ALD) have proven successful in achieving the desired level of control for a variety of fundamental studies. This review aims to give an account of recent progress made in the two aforementioned synthesis techniques for the application of controlled catalytic materials in gas-phase catalysis. For each technique, the focus goes to mono- and bimetallic materials, as well as to recent efforts in enhancing their performance by embedding colloidal templates in porous oxide phases or by the deposition of oxide overlayers via ALD. As a recent extension to the latter, the concept of area-selective ALD for advanced atomic-scale catalyst design is discussed.

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Critical Review of Low-Temperature CO Oxidation and Hysteresis Phenomenon on Heterogeneous Catalysts

Cited by 83 publications

References 135 publications

Recent Progress on Transition Metal Nitrides Nanoparticles as Heterogeneous Catalysts

Recent Progress on Transition Metal Nitrides Nanoparticles as Heterogeneous Catalysts

Three-dimensional strain dynamics govern the hysteresis in heterogeneous catalysis

Designing Nanoparticles and Nanoalloys for Gas-Phase Catalysis with Controlled Surface Reactivity Using Colloidal Synthesis and Atomic Layer Deposition

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