Effects of sintering-resistance and large metal–support interface of alumina nanorod-stabilized Pt nanoparticle catalysts on the improved high temperature water gas shift reaction activity

Yati, Indri; Ridwan, Muhammad; Jeong, Go Een; Lee, Yunsu; Choi, Ji‐Won; Yoon, Chang Won; Suh, Dong Jin; Ha, Jeong‐Myeong

doi:10.1016/j.catcom.2014.06.016

Cited by 12 publications

(6 citation statements)

References 27 publications

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“…Yati et al [39] compared the WGS activity of Pt@Al 2 O 3 nanorod catalyst, obtained by NaBH 4 reduction of trimethyl(tetra-decyl) ammonium bromide (TTAB)-stabilized Pt NPs precursor solution, on polymerized alumina, with that of Pt/Al 2 O 3 -A and Pt/Al 2 O 3 -S catalysts, obtained by impregnation aerogel alumina and sol-gel alumina respectively, with the TTAB-stabilized solution. The Pt@Al 2 O 3 catalyst showed higher CO conversion than the other ones in all the studied conditions.…”

Section: Effect Of Preparation Methods Of Supports Different From Ceriamentioning

confidence: 99%

Platinum Based Catalysts in the Water Gas Shift Reaction: Recent Advances

Palma

Ruocco

Cortese

et al. 2020

Metals

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The water gas shift (WGS) is an equilibrium exothermic reaction, whose corresponding industrial process is normally carried out in two adiabatic stages, to overcome the thermodynamic and kinetic limitations. The high temperature stage makes use of iron/chromium-based catalysts, while the low temperature stage employs copper/zinc-based catalysts. Nevertheless, both these systems have several problems, mainly dealing with safety issues and process efficiency. Accordingly, in the last decade abundant researches have been focused on the study of alternative catalytic systems. The best performances have been obtained with noble metal-based catalysts, among which, platinum-based formulations showed a good compromise between performance and ease of preparation. These catalytic systems are extremely attractive, as they have numerous advantages, including the feasibility of intermediate temperature (250–400 °C) applications, the absence of pyrophoricity, and the high activity even at low loadings. The particle size plays a crucial role in determining their catalytic activity, enhancing the performance of the nanometric catalytic systems: the best activity and stability was reported for particle sizes < 1.7 nm. Moreover the optimal Pt loading seems to be located near 1 wt%, as well as the optimal Pt coverage was identified in 0.25 ML. Kinetics and mechanisms studies highlighted the low energy activation of Pt/Mo2C-based catalytic systems (Ea of 38 kJ·mol−1), the associative mechanism is the most encountered on the investigated studies. This review focuses on a selection of recent published articles, related to the preparation and use of unstructured platinum-based catalysts in water gas shift reaction, and is organized in five main sections: comparative studies, kinetics, reaction mechanisms, sour WGS and electrochemical promotion. Each section is divided in paragraphs, at the end of the section a summary and a summary table are provided.

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Section: Effect Of Preparation Methods Of Supports Different From Ceriamentioning

confidence: 99%

Platinum Based Catalysts in the Water Gas Shift Reaction: Recent Advances

Palma

Ruocco

Cortese

et al. 2020

Metals

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“…Nevertheless, Pt [16], Pd [7] and Au [17] supported catalysts used under realistic water gas shift streams and in frequent start/stop cycles are irreversibly deactivated. Furthermore, the destabilization at high temperatures by sintering of the metal and support has also been reported and represents a problem to overcome for the noble metal supported catalysts in the WGS [18]. Moreover, the high cost associated with Pd and Pt based catalysts is also considered as a serious drawback [19].…”

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confidence: 99%

Mono and bimetallic Cu-Ni structured catalysts for the water gas shift reaction

Arbeláez

Reina

Ivanova

et al. 2015

Applied Catalysis A: General

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Highlights-Efficient Cu-Ni catalysts supported on activated carbon for the water gas shift reaction.-Supressed methanation activity due to the presence of Cu.-Cu-Ni alloy as a key factor of the catalytic design.-Good stability and tolerance towards start/stop situations. AbstractThe water-gas shift (WGS) reaction over structured Cu, Ni, and bimetallic Cu-Ni supported on active carbon (AC) catalysts was investigated. The structured catalysts were prepared in pellets form and applied in the medium range WGS reaction. A good activity in the 180-350 °C temperature range was registered being the bimetallic Cu-Ni:2-1/AC catalyst the best catalyst. Page 2 of 38A c c e p t e d M a n u s c r i p tThe presence of Cu mitigates the methanation activity of Ni favoring the shift process. In addition the active carbon gasification reaction was not observed for the Cu-containing catalyst converting the active carbon in a very convenient support for the WGS reaction. The stability of the bimetallic Cu-Ni:2-1/AC catalyst under continuous operation conditions, as well as its tolerance towards start/stop cycles was also evaluated.

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“…The increase in deoxygenation activity of the catalysts investigated in HDO of guaiacol with the increase in concentration of acid sites was also observed [22]. The proximity of metal active sites and acid groups of support also may have additional synergistic effects on the catalytic activity [20,[23][24][25], such as, for example, enhancement of the overall reaction rate [26,27].…”

Section: Introductionmentioning

confidence: 84%

Hydrodeoxygenation of Lignin-Based Compounds over Ruthenium Catalysts Based on Sulfonated Porous Aromatic Frameworks

Bazhenova,

Kulikov,

Makeeva

et al. 2023

Polymers

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Bifunctional catalysts are a major type of heterogeneous catalytic systems that have been widely investigated for biomass upgrading. In this work, Ru-catalysts based on sulfonated porous aromatic frameworks (PAFs) were used in the hydrodeoxygenation (HDO) of lignin-derived compounds: guaiacol, veratrole, and catechol. The relationship between the activity of metal nanoparticles and the content of acid sites in synthesized catalysts was studied. Herein, their synergy was demonstrated in the Ru-PAF-30-SO3H/5-COD catalyst. The results revealed that this catalytic system promoted partial hydrogenation of lignin-based compounds to ketones without any further transformations. The design of the Ru-PAF-30-SO3H/5-COD catalytic system opens a promising route to the selective conversion of lignin model compounds to cyclohexanone.

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Effects of sintering-resistance and large metal–support interface of alumina nanorod-stabilized Pt nanoparticle catalysts on the improved high temperature water gas shift reaction activity

Cited by 12 publications

References 27 publications

Platinum Based Catalysts in the Water Gas Shift Reaction: Recent Advances

Platinum Based Catalysts in the Water Gas Shift Reaction: Recent Advances

Mono and bimetallic Cu-Ni structured catalysts for the water gas shift reaction

Hydrodeoxygenation of Lignin-Based Compounds over Ruthenium Catalysts Based on Sulfonated Porous Aromatic Frameworks

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