Zinc and platinum co-doped ceria for WGS and CO oxidation

Mandapaka, Ravikiran; Madras, Giridhar

doi:10.1016/j.apcatb.2017.04.044

Cited by 28 publications

(7 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies have been carried out to understand how CO molecules interact with Au particles supported on ZnO [51]. According to the obtained results, the oxidation process starts with a process of CO adsorption taking place in CO/Au/ZnO complexes in specific sites formed by Au clusters following the Mars-van Krevelen (MvK) kinetic model [52]. AuMBR catalysts work similarly, carrying out the CO oxidation process through a MvK kinetic model in synergy with the oxidative capability of the MBR (Bi 2 Mo 1−x Ru x O 6 ) support, which enhances the transport efficiency of electrons toward the surface, thereby improving the oxidative activity of Au particles.…”

Section: Discussionmentioning

confidence: 99%

{CeO2/Bi2Mo1−xRuxO6} and {Au/Bi2Mo1−xRuxO6} Catalysts for Low-Temperature CO Oxidation

et al. 2019

View full text Add to dashboard Cite

Nowadays, one of the most important challenges that humanity faces is to find alternative ways of reducing pollutant emissions. CeO2/Bi2Mo1−xRuxO6 and Au/Bi2Mo1−xRuxO6 catalysts were prepared to efficiently transform carbon monoxide (CO) to carbon dioxide (CO2) at low temperatures. The systems were prepared in a two-step process. First, Bi2Mo1−xRuxO6 supports were synthesized through the hydrothermal procedure under microwave heating. Then, CeO2 was deposited on Bi2Mo1−xRuxO6 using the wet impregnation method, while the incipient impregnation method was selected to deposit gold nanoparticles. The CeO2/Bi2Mo1−xRuxO6 and Au/Bi2Mo1−xRuxO6 catalysts were characterized using SEM microscopy and XRD. Furthermore, energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy were used. Tests were carried out for the supported catalysts in CO oxidation, and high conversion values, nearing 100%, was observed in a temperature range of 100 to 250 °C. The results showed that the best system was the Au/Bi2Mo0.95Ru0.05O6 catalyst, with CO oxidation starting at 50 °C and reaching 100% conversion at 186 °C.

show abstract

Section: Discussionmentioning

confidence: 99%

{CeO2/Bi2Mo1−xRuxO6} and {Au/Bi2Mo1−xRuxO6} Catalysts for Low-Temperature CO Oxidation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Here, taking CO 2 involved photocatalysis as an example, the key role of in situ DRIFTS for mechanism analysis is demonstrated. [231][232][233][234] In situ DRIFTS were adopted to successfully reveal the different reaction mechanism in the photocatalytic reduction of CO 2 by two Pr-loaded C 3 N 4 single atom catalysts: Pr is solely coordinated with N atom (Pr 1 -N 6 /CN) in one of them and coordinated with both N and O atom (Pr 1 -N 4 O 2 /CN) in the other. [224] From the in situ DRIFTS spectra of Pr 1 -N 6 /CN, new peaks at 1514 cm −1 and 1048/1103 cm −1 (corresponding to HCOOH and CH 3 O*, respectively) emerges during reaction (Figure 14a,b).…”

Section: Study Of In-depth Reaction Mechanismmentioning

confidence: 99%

Solar‐Driven Hydrogen Evolution from Value‐Added Waste Treatment

Yu,

Li,

Jiang

et al. 2024

Advanced Energy Materials

View full text Add to dashboard Cite

Hydrogen is one of the most important energy alternatives to conventional fossil‐based fuel. Solar energy based photocatalytic hydrogen evolution (PHE) is a salient approach to produce hydrogen fuel but its efficiency is generally limited by the sluggish and energy‐unfavorable oxidation reaction. Meanwhile, waste treatment has become a worldwide problem and clean treatment is highly demanded to avoid the vast greenhouse emission currently. Inspiringly, PHE can be effectively coupled with the favorable photooxidation of many wastes, which kills two birds with one stone. In this review, the recent progress in PHE coupled with waste treatment is presented, where typical solid, liquid, and gas wastes have been briefly discussed. Focusing on the understanding of complicated reaction mechanism and the revelation of oxidation products, the cutting‐edge techniques for photophysics and surface chemistry characterization have been analyzed, which are imperative to facilitate the following investigation. Finally, the developing trend and existing issues in current research are also discussed in detail so that a holistic blueprint of PHE coupled with waste treatment can be portrayed to accelerate their application in a realistic world.

show abstract

“…To develop the rate expression for the reaction and to identify the rate-determining step of the reaction mechanism, reaction route (RR) analysis has been adopted . The procedure and terminology adopted for the development of rate expression can be seen from our previous studies. , In brief, the rate expression is developed with a notion similar to application of Ohm’s law to an electrical circuit. The overall step reversibility is the driving force term; kinetic resistance is the resistance term, and the rate of reaction is the current flowing through the circuit.…”

Section: Mechanism and Microkinetic Modeling For Co Oxidationmentioning

confidence: 99%

Microkinetic Modeling of CO Oxidation over FePt-Decorated Graphene Oxide

Mandapaka

Bachu

Srivastava

et al. 2017

Ind. Eng. Chem. Res.

Self Cite

View full text Add to dashboard Cite

This study presents the synthesis and activity of PtFe nanoparticle-decorated graphene oxide (GO) for CO oxidation. As compared to conventional methods of synthesizing noble metal-impregnated catalysts, in this study, GO was decorated with FePt nanoparticles using ultrasonication. The obtained GO/FePt was characterized using X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectroscopy, and transmission electron microscopy analysis, confirming the formation of GO and the presence of FePt on GO. GO/FePt was then tested for its activity for CO oxidation. Different catalyst loadings were used, and a differential reactor approach was used to obtain the intrinsic rate of reaction at different experimental temperatures. The active site concentration on the catalyst was obtained using CO chemisorption, and this was incorporated into the kinetic model to propose a dual-site microkinetic model. The kinetic parameters developed in the model were validated against the obtained experimental turnover frequency (TOF) values. As clearly shown by the model predictions against the experimental TOF, we can observe that the model developed in this study fits the experimental results to reasonable accuracy within the differential proximity limit.

show abstract

Zinc and platinum co-doped ceria for WGS and CO oxidation

Cited by 28 publications

References 69 publications

{CeO2/Bi2Mo1−xRuxO6} and {Au/Bi2Mo1−xRuxO6} Catalysts for Low-Temperature CO Oxidation

{CeO2/Bi2Mo1−xRuxO6} and {Au/Bi2Mo1−xRuxO6} Catalysts for Low-Temperature CO Oxidation

Solar‐Driven Hydrogen Evolution from Value‐Added Waste Treatment

Microkinetic Modeling of CO Oxidation over FePt-Decorated Graphene Oxide

Contact Info

Product

Resources

About