Kavita Kumar

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Publications

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Assessing Pt and Ni dissolution mechanism and kinetics of shape-controlled oxygen reduction nanocatalysts

Camille Roiron , Vincent Martin , Kavita Kumar , Laetitia Dubau , Frédéric Maillard
Electrochimica Acta, 2024, 477, pp.143760. ⟨10.1016/j.electacta.2024.143760⟩
Article dans une revue hal-04392526 v1
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On the contact resistance between the anode and the porous transport layer in a proton exchange membrane water electrolyzer

Toni Srour , Kavita Kumar , Vincent Martin , Laetitia Dubau , Frédéric Maillard et al.
International Journal of Hydrogen Energy, 2024, 58, pp.351-361. ⟨10.1016/j.ijhydene.2024.01.134⟩
Article dans une revue hal-04414456 v1
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Operando Fe dissolution in Fe–N–C electrocatalysts during acidic oxygen reduction: Impact of local pH change

Angus Pedersen , Kavita Kumar , Yu-Ping Ku , Vincent Martin , Laetitia Dubau et al.
Energy & Environmental Science, 2024, 17 (17), pp.6323-6337. ⟨10.1039/d4ee01995d⟩
Article dans une revue hal-04667261 v1
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Unveiling the degradation mechanism of cathodic MoS<sub>2</sub>/C electrocatalysts for PEMWE applications

Keyla Teixeira Santos , Luz Adela Zavala Sanchez , Vincent Martin , François Guillet , Kavita Kumar et al.
Electrochimica Acta, 2024, 507, pp.145195. ⟨10.1016/j.electacta.2024.145195⟩
Article dans une revue hal-04727085 v1
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Impact of Carbon Corrosion and Denitrogenation on the Deactivation of Fe–N–C Catalysts in Alkaline Media

Yu-Ping Ku , Kavita Kumar , Andreas Hutzler , Carina Götz , Michael Vorochta et al.
ACS Catalysis, 2024, 14 (11), pp.8576-8591. ⟨10.1021/acscatal.4c01219⟩
Article dans une revue hal-04643161 v1
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Modulating the Fe–N 4 Active Site Content by Nitrogen Source in Fe–N–C Aerogel Catalysts for Proton Exchange Membrane Fuel Cell

Hongxin Ge , Nicolas Bibent , Keyla Teixeira Santos , Kavita Kumar , Julien Jaxel et al.
ACS Catalysis, 2023, 13 (2), pp.1149-1163. ⟨10.1021/acscatal.2c05394⟩
Article dans une revue hal-03940872 v1
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New insights on Fe–N–C catalyst structure from valence-to-core X-ray emission and absorption spectroscopies

Viktoriia Saveleva , Marius Retegan , Kavita Kumar , Frédéric Maillard , Pieter Glatzel
Journal of Materials Chemistry A, 2023, 11 (35), pp.18862-18871. ⟨10.1039/d3ta02878j⟩
Article dans une revue hal-04206396 v1
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Fe–N–C Electrocatalyst and Its Electrode: Are We Talking about the Same Material?

Viktoriia Saveleva , Kavita Kumar , Pascal Theis , Nicole Segura Salas , Ulrike Kramm et al.
ACS Applied Energy Materials, 2023, 6 (2), pp.611-616. ⟨10.1021/acsaem.2c03736⟩
Article dans une revue hal-03969046 v2
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Review on the Degradation Mechanisms of Metal-N-C Catalysts for the Oxygen Reduction Reaction in Acid Electrolyte: Current Understanding and Mitigation Approaches

Kavita Kumar , Laetitia Dubau , Frédéric Jaouen , Frédéric Maillard
Chemical Reviews, 2023, 123 (15), pp.9265-9326. ⟨10.1021/acs.chemrev.2c00685⟩
Article dans une revue (article de synthèse) hal-04160691 v2
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Direct evidence of the role of Co or Pt,Co single atom promoters on the performance of MoS 2 nanoclusters for hydrogen evolution reaction

Luz Zavala , Kavita Kumar , Vincent Martin , Frédéric Maillard , Françoise Maugé et al.
ACS Catalysis, 2023, 13, pp.1221-1229. ⟨10.1021/acscatal.2c05432⟩
Article dans une revue hal-03912300 v1
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Beware of cyclic voltammetry! Measurement artefact in accelerated stress test of fuel cell cathode revealed by operando X-ray diffraction

Raphaël Chattot , Marta Mirolo , Isaac Martens , Kavita Kumar , Vincent Martin et al.
Journal of Power Sources, 2023, 555, pp.232345. ⟨10.1016/j.jpowsour.2022.232345⟩
Article dans une revue hal-03869671 v1
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Spontaneous aerobic ageing of Fe–N–C materials and consequences on oxygen reduction reaction kinetics

Keyla Teixeira Santos , Kavita Kumar , Laetitia Dubau , Hongxin Ge , Sandrine Berthon-Fabry et al.
Journal of Power Sources, 2023, 564, pp.232829. ⟨10.1016/j.jpowsour.2023.232829⟩
Article dans une revue hal-04005348 v1
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Electrochemical Transformation of Fe-N-C catalysts into Iron Oxides in Alkaline Medium and Its Impact on the Oxygen Reduction Reaction Activity

Ricardo Sgarbi , Kavita Kumar , Viktoriia Saveleva , Laetitia Dubau , Raphaël Chattot et al.
Applied Catalysis B: Environmental, 2022, 311, pp.121366. ⟨10.1016/j.apcatb.2022.121366⟩
Article dans une revue hal-03641899 v1
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Break-in Bad: on the Conditioning of Fuel Cell Nanoalloy Catalysts

Raphaël Chattot , Camille Roiron , Kavita Kumar , Vincent Martin , Carlos Augusto Campos Roldan et al.
ACS Catalysis, 2022, 12 (24), pp.15675−15685. ⟨10.1021/acscatal.2c04495⟩
Article dans une revue hal-03887640 v1
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Oxygen Reduction Reaction Mechanism and Kinetics on M-NxCy and M@N-C Active Sites Present in Model M-N-C Catalysts Under Alkaline and Acidic Conditions

Ricardo Sgarbi , Kavita Kumar , Frederic Jaouen , Andrea Zitolo , Edson Ticianelli et al.
Journal of Solid State Electrochemistry, 2021, 25 (1), pp.45-56. ⟨10.1007/s10008-019-04436-w⟩
Article dans une revue hal-02397015 v1
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Identification of Durable and Non-Durable FeNx Sites in Fe-N-C Materials for Proton Exchange Membrane Fuel Cells

Jingkun Li , Moulay Tahar Sougrati , Andrea Zitolo , James M Ablett , Ismail Can Oğuz et al.
Nature Catalysis, 2021, 4, pp.10-19. ⟨10.1038/s41929-020-00545-2⟩
Article dans une revue hal-02931434 v2
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Oxygen Evolution Reaction Activity and Stability Benchmarks for Supported and Unsupported IrOx Electrocatalysts

Camila Daiane Ferreira da Silva , Fabien Claudel , Vincent Martin , Raphaël Chattot , Sofyane Abbou et al.
ACS Catalysis, 2021, 11 (7), pp.4107-4116. ⟨10.1021/acscatal.0c04613⟩
Article dans une revue hal-03195339 v1
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On the Influence of Oxygen on the Degradation of Fe‐N‐C Catalysts

Kavita Kumar , Laetitia Dubau , Michel Mermoux , Jingkun Li , Andrea Zitolo et al.
Angewandte Chemie, 2020, 59, pp.3235-3243. ⟨10.1002/ange.201912451⟩
Article dans une revue hal-02464078 v1
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Fe-N-C Electrocatalysts' Durability: Effects of Single Atoms' Mobility and Clustering

Kavita Kumar , Tristan Asset , Xiaoyan Li , Yuanchao Liu , Xingxu Yan et al.
ACS Catalysis, 2020, pp.484-494. ⟨10.1021/acscatal.0c04625⟩
Article dans une revue hal-03092479 v1

Physical and Chemical Considerations for Improving Catalytic Activity and Stability of Non-Precious-Metal Oxygen Reduction Reaction Catalysts

Kavita Kumar , Pryanka Gairola , Mathieu Lions , Nastaran Ranjbar-Sahraie , Michel Mermoux et al.
ACS Catalysis, 2018, 8 (12), pp.11264-11276. ⟨10.1021/acscatal.8b02934⟩
Article dans une revue hal-01947565 v1

Preparation and Electrochemical Properties of NiCo 2 O 4 Nanospinels Supported on Graphene Derivatives as Earth-Abundant Oxygen Bifunctional Catalysts

Kavita Kumar , Lola Loupias , Christine Canaff , Sophie Morisset , Stéphane Pronier et al.
ChemPhysChem, 2018, 19 (3), pp.319-326. ⟨10.1002/cphc.201701038⟩
Article dans une revue hal-02404983 v1

Metal Loading Effect on the Activity of Co 3 O 4 /N-Doped Reduced Graphene Oxide Nanocomposites as Bifunctional Oxygen Reduction/Evolution Catalysts

Kavita Kumar , Ismail Abidat , Christine Canaff , Aurelien Habrioux , Claudia Morais et al.
ChemElectroChem, 2018, 5 (3), pp.483-493. ⟨10.1002/celc.201701168⟩
Article dans une revue hal-02404989 v1

Effect of the Oxide–Carbon Heterointerface on the Activity of Co3O4/NRGO Nanocomposites toward ORR and OER

Kavita Kumar , Christine Canaff , Julie Rousseau , Sandrine Arrii-Clacens , Teko W. Napporn et al.
Journal of Physical Chemistry C, 2016, 120 (15), pp.7949-7958. ⟨10.1021/acs.jpcc.6b00313⟩
Article dans une revue hal-01434829 v1
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Non-PGM Catalysts for Electrochemical Energy Storage and Conversion

Kavita Kumar , Yu-Ping Ku , Angus Pedersen , Maria‐Magdalena Titirici , Ifan E L Stephens et al.
In PRIME - the Pacific Rim Meeting on Electrochemical and Solid State Science (ECS), 2024, Honololu, Hawaii, United States
Communication dans un congrès hal-04791270 v1
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Importance du précurseur azoté sur les caractéristiques de catalyseurs Fe-N-C pour PEMFC

Hongxin Ge , Kavita Kumar , Keyla Teixeira Santos , Nicolas Bibent , Laetitia Dubau et al.
Colloque francophone du carbone, Société Francophone d'Etude des Carbones, May 2023, Gosier (Guadeloupe), France
Communication dans un congrès hal-04206635 v1

Enhancement of HER activity and stability of MoS2/C catalysts by doping with Co or Pt,Co single atoms

Keyla Teixeira Santos , Luz A. Zavala , Kavita Kumar , Vincent Martin , Frédéric Maillard et al.
74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France
Communication dans un congrès hal-04206625 v1
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Effect of a PTL Coating and The Clamping Pressure on The Performance of a PEM Electrolyzer Cell

Toni Srour , Kavita Kumar , Frédéric Maillard , Jérôme Dillet , Sophie Didierjean et al.
243rd Meeting of the Electrochemical Society, The Electrochemical Society, May 2023, Boston, United States
Communication dans un congrès hal-04206603 v1

Preferentially-shaped PtNi/C ORR nanocatalysts - Challenges towards their integration in MEA

Camille Roiron , Raphaël Riasse , Vincent Martin , Kavita Kumar , Raphaël Chattot et al.
74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France
Communication dans un congrès hal-04206594 v1

Singularities in Testing the Activity and Stability of Fuel Cell Nanocatalysts Revealed by In Situ and Operando X-ray Diffraction

Raphaël Chattot , Amir Gasmi , Kavita Kumar , Laetitia Dubau , Frédéric Maillard et al.
74th Annual Meeting of the International Society of Electrochemistry, The International Society of Electrochemistry, Sep 2023, Lyon, France
Communication dans un congrès hal-04259412 v1

Spontaneous ORR activity Drop of Fe-N-C Catalysts Upon Atmospheric Storage

Keila Teixeira Santos , Kavita Kumar , Laetitia Dubau , Hongxin Ge , Sandrine Berthon-Fabry et al.
243rd Meeting of the Electrochemical Society, The Electrochemical Society, May 2023, Boston, United States
Communication dans un congrès hal-04206610 v1

Unveiling the Influence of Different Experimental Parameters on the Degradation Kinetics of Fe-N-C Oxygen Reduction Reaction Catalysts

Nicolas Ishiki , Keyla Teixeira Santos , Kavita Kumar , Hongxin Ge , Nicolas Bibent et al.
74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France
Communication dans un congrès hal-04206622 v1
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Unveiling the Impact of Carbon Corrosion on the Degradation of Fe-N-C Catalyst Layers in Alkaline Media

Yu-Ping Ku , Kavita Kumar , Ivan Khalakhan , Andreas Hutzler , Carina Götz et al.
In 244th Meeting of the Electrochemical Society, 2023, Gothenburg (Sweden), Sweden. pp.2035-2035, ⟨10.1149/MA2023-02412035mtgabs⟩
Communication dans un congrès hal-04791202 v1
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Revisiting Demetallation of Single Atom Iron in Nitrogen-doped Carbon Electrocatalysts for Proton Exchange Membrane Fuel Cells

Angus Pedersen , Kavita Kumar , Yu-Ping Ku , Vincent Martin , Laetitia Dubau et al.
74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France
Communication dans un congrès hal-04206619 v1

Stability of nanostructured Pt-based electrocatalysts for oxygen reduction reaction

Raphaël Chattot , Camille Roiron , Kavita Kumar , V. Martin , Arnaud Viola et al.
13th Meeting on Nanoscience Advances, Sep 2022, Porquerolles, France
Communication dans un congrès hal-03780395 v1

De l'électrolyte liquide à l'électrolyte solide, vers l'incorporation des catalyseurs PtNi nanostructurés en assemblage membrane électrodes

Camille Roiron , Arnaud Viola , V. Martin , Kavita Kumar , Masuma-Sultana Ripa et al.
2eme REUNION PLENIERE de la Fédération HYDROGENE (FRH2) du CNRS, CNRS, May 2022, Aussois, France
Communication dans un congrès hal-03753859 v1

Unravelling the Influence of Oxygen on the Degradation Mechanisms of Fe-N-C Oxygen Reduction Reaction Catalysts in PEMFC Cathode

Kavita Kumar , Tristan Asset , Plamen Atanassov , Frederic Jaouen , Laetitia Dubau et al.
241st ECS Meeting, The Electrochemical Society, May 2022, Vancouver, Canada
Communication dans un congrès hal-03806976 v1

New Insights into Fe-N-C Oxygen Reduction Reaction Catalysts Structure from Experimental and Computational X-ray Absorption and Emission Spectroscopies

Viktoriia Saveleva , Marius Retegan , Kavita Kumar , Frédéric Maillard , Pieter Glatzel
32nd Topical Meeting of the International Society of Electrochemistry, Jun 2022, Stockholm, Sweden
Communication dans un congrès hal-03799664 v1
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Aerogel-Derived Fe-N-C Catalysts for Oxygen Electro-Reduction. Linking Their Pore Structure and PEMFC Performance

Frederic Jaouen , Hongxin Ge , Kavita Kumar , Nicolas Bibent , Frédéric Maillard et al.
241st ECS meeting, The Electrochemical Society, May 2022, Vancouver, Canada
Communication dans un congrès hal-03806972 v1
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Fe-N-Carbon aerogel catalyst for oxygen reduction reaction

Hongxin Ge , Frederic Jaouen , Nicolas Bibent , Kavita Kumar , Laetitia Dubau et al.
EFCF 2021, Jun 2021, Lucerne (virtual), Switzerland
Communication dans un congrès hal-03195353 v1

Fe-N-Carbon Aerogel Catalysts with Enhanced Mass Transfer Property in Proton Exchange Membrane Fuel Cells

Hongxin Ge , Frederic Jaouen , Nicolas Bibent , Kavita Kumar , Laetitia Dubau et al.
72nd Annual Meeting of the International Society of Electrochemistry, Jul 2021, Jeju Island, South Korea
Communication dans un congrès hal-03504301 v1

Atomic Imaging of Fe, N-doped Carbon Electrocatalysts' Active Sites and Their Stability

Tristan Asset , Kavita Kumar , Sheng Dai , Mingjie Xu , Yechuan Chen et al.
236th ECS Meeting of the Electrochemical Society, Oct 2019, Atlanta, United States
Communication dans un congrès hal-02352230 v1

Towards improved catalytic activity and stability of non-precious metal catalyst for proton exchange membrane fuel cells ?

Kavita Kumar , Pryanka Gairola , Mathieu Lions , Nastaran Ranjbar Sahraie , Michel Mermoux et al.
Fundamentals of Fuel Cells (FDFC) 2019, Feb 2019, Nantes, France
Communication dans un congrès hal-02480395 v1

Iron-Nitrogen-Carbon (Fe-N-C) Active Sites Imaging By Scanning Transmission Electron Microscopy (STEM)

Tristan Asset , Kavita Kumar , Sheng Dai , Mingjie Xu , Yechuan Chen et al.
Meeting of the Electrochemical Society (ECS), 2019, Atlanta (USA), United States. pp.1614-1614, ⟨10.1149/MA2019-02/35/1614⟩
Communication dans un congrès hal-04791111 v1

Cobaltites Supportées sur Oxyde de Graphène Réduit Dopé avec des Hétéroatomes (N, S, F) pour l’Élaboration d’une Électrode à Air Réversible

Kavita Kumar , Teko W. Napporn , Aurélien Habrioux , Boniface Kokoh
Journées d’Electrochimie 2017, Société chimique de France (SCF), subdivision Électrochimie, Jun 2017, Bordeaux, France
Communication dans un congrès hal-04790977 v1

Noble Metal Free Catalysts for ORR and OER: Doped Graphene Based Materials

Christine Canaff , Kavita Kumar , Teko W. Napporn , Aurélien Habrioux , Boniface Kokoh
European Conference on Applications of Surface and Interface Analysis (EUCASIA), Chimie Paris Tech; Société Française du Vide (SFV), 2017, Montpellier, France
Communication dans un congrès hal-04790996 v1

Heteroatom-doped graphene supported Co-based nanospinels as bifunctional catalysts for ORR and OER

Kavita Kumar , Teko W. Napporn , Aurélien Habrioux , Boniface Kokoh
International Symposium on Electrocatalysis (ECAT), Sep 2016, Kanagawa, Japan
Communication dans un congrès hal-04790954 v1
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Inductively Coupled Plasma Mass Spectrometry Serving Electrochemistry

Vincent Martin , Kavita Kumar , Arnaud Viola , Camille Roiron , Laetitia Dubau et al.
37th Topical Meeting of ISE / Electrochemical Energy for a Greener and more Sustainable Future Society, Jun 2024, Stresa, Italy
Poster de conférence hal-04642392 v1
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Edge sites of MoS$_2$ catalysts are active for both HDS and HER reactions: the proof of concept

Luz Zavala-Sanchez , Kavita Kumar , Vincent Martin , Frédéric Maillard , Xavier Portier et al.
EuropaCat 2023 - 15th European Congress on Catalysis, Aug 2023, Prague, Czech Republic.
Poster de conférence hal-04206614 v1
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Fe-based Single Atom Electrocatalyst Structure Probed by X-ray Emission Spectroscopy

Viktoriia Saveleva , Kavita Kumar , Pascal Theis , Nicole Segura Salas , Ulrike Kramm et al.
Gordon Research Conference, Feb 2023, Lucca, Italy. , ⟨10.15151/ESRF-ES-799089889⟩
Poster de conférence hal-04005436 v1

Unravelling the Degradation Mechanisms of Non-Precious Metal Oxygen Reduction Reaction Catalysts in PEMFC Cathode Relevant Conditions

Kavita Kumar , Pryanka Gairola , Mathieu Lions , Nastaran Ranjbar-Sahraie , Michel Mermoux et al.
First Italian Electrochemical Discussions: latest insights on PGM-free catalysts for Energy Systems and Fuel Cells, Feb 2019, Turin, Italy
Poster de conférence hal-03092491 v1

Co-based Nanospinels as Earth-Abundant Catalysts for ORR and OER in Alkaline Medium

Kavita Kumar , Teko W. Napporn , Aurélien Habrioux , Boniface Kokoh
European Fuel Cell Car Workshop (EFCW), Mar 2017, Orléans, France.
Poster de conférence hal-04790889 v1