Low temperature catalytic reduction of NO over porous Pt/ZIF-8

Challagulla, Swapna; Payra, Soumitra; Rameshan, Reeshma; Roy, Sounak

doi:10.1016/j.jece.2020.103815

Cited by 19 publications

(6 citation statements)

References 37 publications

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“…In continuation, the as-prepared colloidal Pt NPs were utilized to functionalize the ZIF-8 host matrix to obtain a heterogeneous nanocomposite with considerable physiochemical properties. ZIFs are a class of microporous materials with tetrahedral topologies 60 . They are generally constructed by kinking four-coordinated metals like Zn 2+ , Co 3+ , Cu 2+ , Ni 2+ , etc.…”

Section: Resultsmentioning

confidence: 99%

Application of Pt@ZIF-8 nanocomposite-based electrochemical biosensor for sensitive diagnosis of tau protein in Alzheimer’s disease patients

Chakari-Khiavi,

Mirzaie,

Khalilzadeh

et al. 2023

Sci Rep

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Alzheimer’s disease (AD) is a progressive brain disorder characterized by the ongoing decline of brain functions. Studies have revealed the detrimental effects of hyperphosphorylated tau (p-tau) protein fibrils in AD pathogenesis, highlighting the importance of this factor in the early-stage detection of AD conditions. We designed an electrochemical immunosensor for quantitative detection of the cis conformation of the p-tau protein (cis-p-tau) employing platinum nanoparticles (Pt NPs) supported on zeolitic imidazolate frameworks (ZIF) for modifying the glassy carbon electrode (GCE) surface. Under optimum conditions, the immunosensor selectively and sensitively detected cis-p-tau within the broad linear range of 1 fg mL−1 to 10 ng mL−1 and the low limit of detection (LOD) of 1 fg mL−1 with desired reproducibility and stability. Furthermore, the fabricated immunosensor's performance was examined for the cis-p-tau analysis in the serum of AD patients, indicating its accuracy and feasibility for real-sample analysis. Notably, this is the first application of Pt@ZIF-8 nanocomposite in fabricating a valid immunosensor for selective cis-p-tau detection, even in the presence of trans-p-tau. It is worth mentioning that the enzyme-linked immunosorbent assay (ELISA) reference technique is not able to evaluate pico- or femtomolar concentrations of cis-p-tau, making the fabricated immunosensor superior for early-stage measurement and screening of AD.

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Section: Resultsmentioning

confidence: 99%

Application of Pt@ZIF-8 nanocomposite-based electrochemical biosensor for sensitive diagnosis of tau protein in Alzheimer’s disease patients

Chakari-Khiavi,

Mirzaie,

Khalilzadeh

et al. 2023

Sci Rep

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“…Traditional carriers of catalyst for NO reduction include metal oxide (e.g., Al 2 O 3 [87], SiO 2 [88]), zeolite (ZSM-5 [89], ZIF [90], H-Zeolite Y(HY) [91]), aluminate spinel [92], and perovskite-type composite oxide [93]. They are relative stable and commonly compatible with most of precious and non-precious metals.…”

Section: Traditional Carriermentioning

confidence: 99%

“…Later, they [95] doped Cr on Pt/ZSM-35 and tested its performance in H 2 -SCR process, and they got an attractive increase of NO conversion from 80.5% to 94.7% at 120 • C on Pt-Cr/ZSM-35 catalyst. Challagulla et al [90] produced a Pt/ZIF-8 catalyst with a perfect body-centered cubic structure. As shown in Figure 6, FE-SEM and HR-TEM images show that metal platinum nanoparticles are synthesized with high surface area porous ZIF-8 and original ZIF-8.…”

Section: Traditional Carriermentioning

confidence: 99%

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State-of-Art Review of NO Reduction Technologies by CO, CH4 and H2

et al. 2021

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Removal of nitrogen oxides during coal combustion is a subject of great concerns. The present study reviews the state-of-art catalysts for NO reduction by CO, CH4, and H2. In terms of NO reduction by CO and CH4, it focuses on the preparation methodologies and catalytic properties of noble metal catalysts and non-noble metal catalysts. In the technology of NO removal by H2, the NO removal performance of the noble metal catalyst is mainly discussed from the traditional carrier and the new carrier, such as Al2O3, ZSM-5, OMS-2, MOFs, perovskite oxide, etc. By adopting new preparation methodologies and introducing the secondary metal component, the catalysts supported by a traditional carrier could achieve a much higher activity. New carrier for catalyst design seems a promising aspect for improving the catalyst performance, i.e., catalytic activity and stability, in future. Moreover, mechanisms of catalytic NO reduction by these three agents are discussed in-depth. Through the critical review, it is found that the adsorption of NOx and the decomposition of NO are key steps in NO removal by CO, and the activation of the C-H bond in CH4 and H-H bonds in H2 serves as a rate determining step of the reaction of NO removal by CH4 and H2, respectively.

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“…Due to the excessive industrial effluents, human sewage, and nitrogenous fertilizers from the agricultural sector, the concentration of gaseous NO x in the environment and nitrate salts in the groundwater is considerably rising. This has caused serious global environmental problems, leading to health concerns, which is a major issue. − The current situation demands the development of an energy-efficient process that can convert gaseous NO x and nitrate into a useful and efficient product. NO x and nitrate are sources of nitrogen and can be used to produce back to the fertilizer ammonia.…”

Section: Introductionmentioning

confidence: 99%

Rags to Riches: Meliorating the Electrocatalytic Reduction of Nitrate to Ammonia over Cu-Based Nanoalloys

et al. 2023

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The selective electrocatalytic reduction of nitrate pollutants into valuable ammonia products has gained significant momentum thanks to the emerging circular economy model. However, this technology suffers from poor selectivity, low Faradic efficiency, and a competing parallel hydrogen evolution reaction. In this regard, the use of nanoalloys offers a promising approach to fine-tune the electronic structure by shifting the position of the dband center and modulating the interaction with nitrate and other reaction intermediates and thus enhance the selectivity of desirable products, which may not be accessible over a pristine single metallic active site. Herein, we have systematically doped Cu (d 9 s 2 ) by Ni (d 8 s 2 ) and Zn (d 10 s 2 ) to produce Cu 0.85 Ni 0.15 /C and Cu 0.85 Zn 0.15 /C, respectively, from the corresponding bimetallic metal−organic framework materials. A thorough investigation of electrocatalytic nitrate reduction over the as-synthesized nanomaterials was done by studying the product yield, selectivity, Faradic efficiency, reaction order, rate, and activation energy. The synthesized carbon-supported nanoalloy of Cu 0.85 Zn 0.15 /C outperformed both Cu 0.85 Ni 0.15 /C and Cu/C, and the superiority was rationalized by the first-principles calculation, which unveiled the significance of the modulation of the d-bands in influencing the interaction of nitrate and other reaction intermediates with the surface, thereby enhancing the selectivity and catalytic efficacy.

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Low temperature catalytic reduction of NO over porous Pt/ZIF-8

Cited by 19 publications

References 37 publications

Application of Pt@ZIF-8 nanocomposite-based electrochemical biosensor for sensitive diagnosis of tau protein in Alzheimer’s disease patients

Application of Pt@ZIF-8 nanocomposite-based electrochemical biosensor for sensitive diagnosis of tau protein in Alzheimer’s disease patients

State-of-Art Review of NO Reduction Technologies by CO, CH4 and H2

Rags to Riches: Meliorating the Electrocatalytic Reduction of Nitrate to Ammonia over Cu-Based Nanoalloys

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