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  1. Article: Aqueous Phase Reforming over Platinum Catalysts on Doped Carbon Supports: Exploring Platinum-Heteroatom Interactions.

    Pazos Urrea, Monica / Meilinger, Simon / Herold, Felix / Gopakumar, Jithin / Tusini, Enrico / De Giacinto, Andrea / Zimina, Anna / Grunwaldt, Jan-Dierk / Chen, De / Rønning, Magnus

    ACS catalysis

    2024  Volume 14, Issue 6, Page(s) 4139–4154

    Abstract: A series of platinum catalysts supported on carbon nanofibers with various heteroatom dopings were synthesized to investigate the effect of the local platinum environment on the catalytic activity and selectivity in aqueous phase reforming (APR) of ... ...

    Abstract A series of platinum catalysts supported on carbon nanofibers with various heteroatom dopings were synthesized to investigate the effect of the local platinum environment on the catalytic activity and selectivity in aqueous phase reforming (APR) of ethylene glycol (EG). Typical carbon dopants such as oxygen, nitrogen, sulfur, phosphorus, and boron were chosen based on their ability to bring acidic or basic functional groups to the carbon surface. In situ X-ray absorption spectroscopy (XAS) was used to identify the platinum oxidation state and platinum species formed during APR of EG through multivariate curve resolution alternating least-squares analysis, observing differences in activity, selectivity, and platinum local environment among the catalysts. The platinum-based catalyst on the nitrogen-doped carbon support demonstrated the most favorable properties for H
    Language English
    Publishing date 2024-03-04
    Publishing country United States
    Document type Journal Article
    ISSN 2155-5435
    ISSN 2155-5435
    DOI 10.1021/acscatal.3c05385
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Complex coacervates as extraction media

    van Lente, Jéré / Pazos Urrea, Monica / Brouwer, Thomas / Schuur, Boelo / Lindhoud, Saskia

    Green chemistry. 2021 Aug. 16, v. 23, no. 16

    2021  

    Abstract: Various solvents such as ionic liquids, deep eutectic solvents, and aqueous two phase systems have been suggested as greener alternatives to existing extraction processes. We propose to add macroscopic complex coacervates to this list. Complex ... ...

    Abstract Various solvents such as ionic liquids, deep eutectic solvents, and aqueous two phase systems have been suggested as greener alternatives to existing extraction processes. We propose to add macroscopic complex coacervates to this list. Complex coacervates are liquid-like forms of polyion condensates and consist of a complex of oppositely charged polyions and water. Previous research focussing on the biological significance of these polyion-rich phases has shown that polyion condensates have the ability to extract certain solutes from water and back-extract them by changing parameters such as ionic strength and pH. In this study, we present the distribution coefficients of five commonly used industrial chemicals, namely lactic acid, butanol, and three types of lipase enzymes in poly(ethylenimine)/poly(acrylic acid) complex coacervates. It was found that the distribution coefficients can vary strongly upon variation of tunable parameters such as polyion ratio, ionic strength, polyion and compound concentrations, and temperature. Distribution coefficients ranged from approximately 2 to 50 depending on the tuning of the system parameters. It was also demonstrated that a temperature-swing extraction is possible, with back-extraction of butanol from complex coacervates with a recovery of 21.1%, demonstrating their potential as extraction media.
    Keywords butanol ; carboxylic ester hydrolases ; green chemistry ; ionic strength ; lactic acid ; pH ; temperature
    Language English
    Dates of publication 2021-0816
    Size p. 5812-5824.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2006274-6
    ISSN 1463-9270 ; 1463-9262
    ISSN (online) 1463-9270
    ISSN 1463-9262
    DOI 10.1039/d1gc01880a
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Complex coacervates as extraction media.

    van Lente, Jéré / Pazos Urrea, Monica / Brouwer, Thomas / Schuur, Boelo / Lindhoud, Saskia

    Green chemistry : an international journal and green chemistry resource : GC

    2021  Volume 23, Issue 16, Page(s) 5812–5824

    Abstract: Various solvents such as ionic liquids, deep eutectic solvents, and aqueous two phase systems have been suggested as greener alternatives to existing extraction processes. We propose to add macroscopic complex coacervates to this list. Complex ... ...

    Abstract Various solvents such as ionic liquids, deep eutectic solvents, and aqueous two phase systems have been suggested as greener alternatives to existing extraction processes. We propose to add macroscopic complex coacervates to this list. Complex coacervates are liquid-like forms of polyion condensates and consist of a complex of oppositely charged polyions and water. Previous research focussing on the biological significance of these polyion-rich phases has shown that polyion condensates have the ability to extract certain solutes from water and back-extract them by changing parameters such as ionic strength and pH. In this study, we present the distribution coefficients of five commonly used industrial chemicals, namely lactic acid, butanol, and three types of lipase enzymes in poly(ethylenimine)/poly(acrylic acid) complex coacervates. It was found that the distribution coefficients can vary strongly upon variation of tunable parameters such as polyion ratio, ionic strength, polyion and compound concentrations, and temperature. Distribution coefficients ranged from approximately 2 to 50 depending on the tuning of the system parameters. It was also demonstrated that a temperature-swing extraction is possible, with back-extraction of butanol from complex coacervates with a recovery of 21.1%, demonstrating their potential as extraction media.
    Language English
    Publishing date 2021-07-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2006274-6
    ISSN 1463-9270 ; 1463-9262
    ISSN (online) 1463-9270
    ISSN 1463-9262
    DOI 10.1039/d1gc01880a
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

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