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  1. Article ; Online: Strategic design of VO

    Chhetri, Ashis / Biswas, Ashmita / Podder, Sumana / Dey, Ramendra Sundar / Mitra, Joyee

    Nanoscale

    2024  

    Abstract: Electrocatalytic nitrogen fixation to ammonia ( ... ...

    Abstract Electrocatalytic nitrogen fixation to ammonia (NH
    Language English
    Publishing date 2024-04-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d4nr00640b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Elevating the energy efficiency for the power-to-ammonia conversion: Role of oxygen evolution reaction kinetics.

    Biswas, Ashmita / Dey, Ramendra Sundar

    The Journal of chemical physics

    2023  Volume 158, Issue 20

    Abstract: Electrochemical nitrogen reduction reaction (NRR) is imperatively countered with the oxygen evolution reaction (OER) on a conventional Pt counter electrode. Upon focusing on the development of suitable cathode catalysts, it is usually overseen that OER ... ...

    Abstract Electrochemical nitrogen reduction reaction (NRR) is imperatively countered with the oxygen evolution reaction (OER) on a conventional Pt counter electrode. Upon focusing on the development of suitable cathode catalysts, it is usually overseen that OER on Pt seeks a significant energy input to overcome the slow reaction kinetics, regardless of the efficiency of the NRR catalyst. Here, we unveil an out-of-the-box concept with state-of-the-art catalysts that, on pursuing OER with RuO2 in KOH, the NRR process reinforces thermodynamically. In this work, it has been shown how both the electrode and electrolyte simultaneously help to elevate a reaction mechanism in terms of Gibbs' energy and equilibrium constant. As a proof of concept, we assembled RuO2 with an NRR catalyst, iron phthalocyanine (FePc), in an electrolyzer, preferably in a two-electrode setup, where the catholyte consisted of 0.5M NaBF4. This system achieved selective cathodic conversion of N2 to NH3 with 67.6% Faradaic efficiency at 0.0 V (vs reversible hydrogen electrode) and simultaneous anodic water oxidation to O2 with a high electricity-to-chemical energy conversion efficiency of 46.7%. The electrolyzer forecasted a full cell voltage of 2.04 V, which demands only 603 mV overpotential to attain 0.5 mA current to drive forward the chemical equilibrium of the overall cell reaction. This study not only emphasized the importance of electrode-electrolyte improvisation but also provided a wider outlook in terms of different thermodynamic parameters to be considered to determine the efficiency of the overall NRR coupled OER process.
    Language English
    Publishing date 2023-05-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 3113-6
    ISSN 1089-7690 ; 0021-9606
    ISSN (online) 1089-7690
    ISSN 0021-9606
    DOI 10.1063/5.0153706
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Refining the Spectroscopic Detection Technique: A Pivot in the Electrochemical Ammonia Synthesis.

    Biswas, Ashmita / Ghosh, Bikram / Dey, Ramendra Sundar

    Langmuir : the ACS journal of surfaces and colloids

    2023  Volume 39, Issue 10, Page(s) 3810–3820

    Abstract: Ammonia has been recognized as the future fuel because of its immense advantages over liquid hydrogen. The research trend nowadays is mostly inclined toward the electrochemical ammonia synthesis since it offers a sustainable method of green ammonia ... ...

    Abstract Ammonia has been recognized as the future fuel because of its immense advantages over liquid hydrogen. The research trend nowadays is mostly inclined toward the electrochemical ammonia synthesis since it offers a sustainable method of green ammonia production. The indophenol blue method is one of the largely used colorimetric techniques to detect ammonia spectroscopically but lacks a proper experimental protocol. The unresolved speculations related to this method concerning stability of dye, sequence of mixing of reagents, importance of pH in the dye formation, or sensitivity of the method to interferants need vigorous experimental verification and a legitimate protocol has to be set up for a reliable and reproducible data. This work thus aims to unveil the artefacts of this method and explore the mechanisms involved such that it becomes easy for a newcomer as well as existing researchers in the field to understand the requirement of rigorous optimizations in this technique.
    Language English
    Publishing date 2023-02-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2005937-1
    ISSN 1520-5827 ; 0743-7463
    ISSN (online) 1520-5827
    ISSN 0743-7463
    DOI 10.1021/acs.langmuir.3c00201
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Deciphering the bridge oxygen vacancy-induced cascading charge effect for electrochemical ammonia synthesis.

    Biswas, Ashmita / Barman, Narad / Nambron, Avinash / Thapa, Ranjit / Sudarshan, Kathi / Dey, Ramendra Sundar

    Materials horizons

    2024  

    Abstract: Oxygen vacancy engineering has recently been gaining much interest as the charging effect it induces in a material can be used for varied applications. Usually, semiconductor materials act poorly in electrocatalysis, particularly in the nitrogen ... ...

    Abstract Oxygen vacancy engineering has recently been gaining much interest as the charging effect it induces in a material can be used for varied applications. Usually, semiconductor materials act poorly in electrocatalysis, particularly in the nitrogen reduction reaction (NRR), owing to their inherent charge deficit and huge band gap. Vacancy introduction can be a viable material engineering route to make use of these materials for the NRR. However, a detailed investigation of the vacancy-type and its role for the structural reorientation and charge redistribution of a material is lagging in the field of NRRs. This work thus focuses on the synthesis of oxygen vacancy-engineered SnO
    Language English
    Publishing date 2024-02-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2744250-0
    ISSN 2051-6355 ; 2051-6347
    ISSN (online) 2051-6355
    ISSN 2051-6347
    DOI 10.1039/d3mh02141f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Ample Lewis Acidic Sites in Mg

    Biswas, Ashmita / Ghosh, Bikram / Sudarshan, Kathi / Gupta, Santosh K / Dey, Ramendra Sundar

    Inorganic chemistry

    2023  Volume 62, Issue 34, Page(s) 14094–14102

    Abstract: Extensive research on the electrochemical nitrogen reduction reaction (NRR) has put forward a sound list of potential catalyst materials with properties inducing ... ...

    Abstract Extensive research on the electrochemical nitrogen reduction reaction (NRR) has put forward a sound list of potential catalyst materials with properties inducing N
    Language English
    Publishing date 2023-08-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.3c02389
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Electronic interplay: synergism of binary transition metals and role of M-N-S site towards oxygen electrocatalysis.

    Das, Manisha / Biswas, Ashmita / Dey, Ramendra Sundar

    Chemical communications (Cambridge, England)

    2022  Volume 58, Issue 12, Page(s) 1934–1937

    Abstract: Towards rational catalyst development, a binary Fe-Co centre has been coordinated with S and N in a nanocarbon matrix. An electronic drift between Fe-Co and an extended +R effect from the S dopants towards the metals through the ... ...

    Abstract Towards rational catalyst development, a binary Fe-Co centre has been coordinated with S and N in a nanocarbon matrix. An electronic drift between Fe-Co and an extended +R effect from the S dopants towards the metals through the p
    Language English
    Publishing date 2022-02-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d1cc06050c
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Oxygen Functionalization-Induced Charging Effect on Boron Active Sites for High-Yield Electrocatalytic NH

    Biswas, Ashmita / Kapse, Samadhan / Thapa, Ranjit / Dey, Ramendra Sundar

    Nano-micro letters

    2022  Volume 14, Issue 1, Page(s) 214

    Abstract: Ammonia has been recognized as the future renewable energy fuel because of its wide-ranging applications in ... ...

    Abstract Ammonia has been recognized as the future renewable energy fuel because of its wide-ranging applications in H
    Language English
    Publishing date 2022-11-05
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2642093-4
    ISSN 2150-5551 ; 2150-5551
    ISSN (online) 2150-5551
    ISSN 2150-5551
    DOI 10.1007/s40820-022-00966-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Engineering hydrophobic-aerophilic interfaces to boost N

    Bhardwaj, Sakshi / Das, Sabuj Kanti / Biswas, Ashmita / Kapse, Samadhan / Thapa, Ranjit / Dey, Ramendra Sundar

    Chemical science

    2023  Volume 14, Issue 33, Page(s) 8936–8945

    Abstract: Ammonia is a crucial biochemical raw material for nitrogen containing fertilizers and a hydrogen energy carrier obtained from renewable energy sources. Electrocatalytic ammonia synthesis is a renewable and less-energy intensive way as compared to the ... ...

    Abstract Ammonia is a crucial biochemical raw material for nitrogen containing fertilizers and a hydrogen energy carrier obtained from renewable energy sources. Electrocatalytic ammonia synthesis is a renewable and less-energy intensive way as compared to the conventional Haber-Bosch process. The electrochemical nitrogen reduction reaction (eNRR) is sluggish, primarily due to the deceleration by slow N
    Language English
    Publishing date 2023-08-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 2559110-1
    ISSN 2041-6539 ; 2041-6520
    ISSN (online) 2041-6539
    ISSN 2041-6520
    DOI 10.1039/d3sc03002d
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Tuning the Electronic Structure of Cobalt Selenide on Copper Foam by Introducing a Ni Buffer Layer for Highly Efficient Electrochemical Water Splitting.

    Das, Manisha / Biswas, Ashmita / Khan, Zubair Bashir / Dey, Ramendra Sundar

    Inorganic chemistry

    2022  Volume 61, Issue 33, Page(s) 13218–13225

    Abstract: The development of a cost-effective, remarkably competent, and durable bifunctional electrocatalyst is the foremost requirement of water splitting to generate ... ...

    Abstract The development of a cost-effective, remarkably competent, and durable bifunctional electrocatalyst is the foremost requirement of water splitting to generate H
    Language English
    Publishing date 2022-08-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.2c02325
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Electronic interplay: synergism of binary transition metals and role of M–N–S site towards oxygen electrocatalysis

    Das, Manisha / Biswas, Ashmita / Dey, Ramendra Sundar

    Chemical communications. 2022 Feb. 8, v. 58, no. 12

    2022  

    Abstract: Towards rational catalyst development, a binary Fe–Co centre has been coordinated with S and N in a nanocarbon matrix. An electronic drift between Fe–Co and an extended +R effect from the S dopants towards the metals through the pz orbital of N are ... ...

    Abstract Towards rational catalyst development, a binary Fe–Co centre has been coordinated with S and N in a nanocarbon matrix. An electronic drift between Fe–Co and an extended +R effect from the S dopants towards the metals through the pz orbital of N are beneficial for oxygen electrocatalysis and a zinc–air battery.
    Keywords batteries ; catalysts ; oxygen ; synergism
    Language English
    Dates of publication 2022-0208
    Size p. 1934-1937.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/d1cc06050c
    Database NAL-Catalogue (AGRICOLA)

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