Kavita Kumar

Publications

Article dans une revue (25)

Establishing the stability number descriptor for Fe–N–C fuel cell electrocatalysts Yu-Ping Ku,Kavita Kumar,Antoine Bonnefont,Li Jiao,Marco Mazzucatoet al. Chemical Science, 2025, 16 (20), pp.8697-8710. ⟨10.1039/d5sc00547g⟩ Article dans une revue hal-05176490v1
Evidence for the stabilization of FeN$_4$ sites by Pt particles during acidic oxygen reduction Nicolas A Ishiki,Keyla Teixeira Santos,Nicolas Bibent,Kavita Kumar,Ina Reichmannet al. Nature Communications, 2025, 16 (1), pp.6404. ⟨10.1038/s41467-025-61806-x⟩ Article dans une revue hal-05166293v1
Unveiling the degradation mechanism of cathodic MoS&lt;sub&gt;2&lt;/sub&gt;/C electrocatalysts for PEMWE applications Keyla Teixeira Santos,Luz Adela Zavala Sanchez,Vincent Martin,François Guillet,Kavita Kumaret al. Electrochimica Acta, 2024, 507, pp.145195. ⟨10.1016/j.electacta.2024.145195⟩ Article dans une revue hal-04727085v1
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 Vorochtaet al. ACS Catalysis, 2024, 14 (11), pp.8576-8591. ⟨10.1021/acscatal.4c01219⟩ Article dans une revue hal-04643161v1
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-04392526v1
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 Maillardet al. International Journal of Hydrogen Energy, 2024, 58, pp.351-361. ⟨10.1016/j.ijhydene.2024.01.134⟩ Article dans une revue hal-04414456v1
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 Dubauet al. Energy & Environmental Science, 2024, 17 (17), pp.6323-6337. ⟨10.1039/d4ee01995d⟩ Article dans une revue hal-04667261v1
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-Fabryet al. Journal of Power Sources, 2023, 564, pp.232829. ⟨10.1016/j.jpowsour.2023.232829⟩ Article dans une revue hal-04005348v1
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 Jaxelet al. ACS Catalysis, 2023, 13 (2), pp.1149-1163. ⟨10.1021/acscatal.2c05394⟩ Article dans une revue hal-03940872v1
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-04206396v1
Fe–N–C Electrocatalyst and Its Electrode: Are We Talking about the Same Material? Viktoriia Saveleva,Kavita Kumar,Pascal Theis,Nicole Segura Salas,Ulrike Krammet al. ACS Applied Energy Materials, 2023, 6 (2), pp.611-616. ⟨10.1021/acsaem.2c03736⟩ Article dans une revue hal-03969046v2
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 Maugéet al. ACS Catalysis, 2023, 13, pp.1221-1229. ⟨10.1021/acscatal.2c05432⟩ Article dans une revue hal-03912300v1
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 Martinet al. Journal of Power Sources, 2023, 555, pp.232345. ⟨10.1016/j.jpowsour.2022.232345⟩ Article dans une revue hal-03869671v1
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-04160691v2
Break-in Bad: on the Conditioning of Fuel Cell Nanoalloy Catalysts Raphaël Chattot,Camille Roiron,Kavita Kumar,Vincent Martin,Carlos Augusto Campos Roldanet al. ACS Catalysis, 2022, 12 (24), pp.15675−15685. ⟨10.1021/acscatal.2c04495⟩ Article dans une revue hal-03887640v1
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 Chattotet al. Applied Catalysis B: Environmental, 2022, 311, pp.121366. ⟨10.1016/j.apcatb.2022.121366⟩ Article dans une revue hal-03641899v1
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 Ticianelliet al. Journal of Solid State Electrochemistry, 2021, 25 (1), pp.45-56. ⟨10.1007/s10008-019-04436-w⟩ Article dans une revue hal-02397015v1
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 Oğuzet al. Nature Catalysis, 2021, 4, pp.10-19. ⟨10.1038/s41929-020-00545-2⟩ Article dans une revue hal-02931434v2
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 Abbouet al. ACS Catalysis, 2021, 11 (7), pp.4107-4116. ⟨10.1021/acscatal.0c04613⟩ Article dans une revue hal-03195339v1
On the Influence of Oxygen on the Degradation of Fe‐N‐C Catalysts Kavita Kumar,Laetitia Dubau,Michel Mermoux,Jingkun Li,Andrea Zitoloet al. Angewandte Chemie, 2020, 59, pp.3235-3243. ⟨10.1002/ange.201912451⟩ Article dans une revue hal-02464078v1
Fe-N-C Electrocatalysts' Durability: Effects of Single Atoms' Mobility and Clustering Kavita Kumar,Tristan Asset,Xiaoyan Li,Yuanchao Liu,Xingxu Yanet al. ACS Catalysis, 2020, pp.484-494. ⟨10.1021/acscatal.0c04625⟩ Article dans une revue hal-03092479v1
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 Mermouxet al. ACS Catalysis, 2018, 8 (12), pp.11264-11276. ⟨10.1021/acscatal.8b02934⟩ Article dans une revue hal-01947565v1
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 Pronieret al. ChemPhysChem, 2018, 19 (3), pp.319-326. ⟨10.1002/cphc.201701038⟩ Article dans une revue hal-02404983v1
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 Moraiset al. ChemElectroChem, 2018, 5 (3), pp.483-493. ⟨10.1002/celc.201701168⟩ Article dans une revue hal-02404989v1
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. Nappornet al. Journal of Physical Chemistry C, 2016, 120 (15), pp.7949-7958. ⟨10.1021/acs.jpcc.6b00313⟩ Article dans une revue hal-01434829v1

Communication dans un congrès (24)

Stabilization of Fe-N4 sites by platinum during oxygen reduction reaction in acid medium Nicolas Ishiki,Keyla Teixeira Santos,Nicolas Bibent,Kavita Kumar,Ina Reichmannet al. 247th ECS Meeting, The Electrochemical Society, May 2025, Montréal (Québec), Canada. pp.2653-2653, ⟨10.1149/MA2025-01552653mtgabs⟩ Communication dans un congrès hal-05253226v1
Non-PGM Catalysts for Electrochemical Energy Storage and Conversion Kavita Kumar,Yu-Ping Ku,Angus Pedersen,Maria‐Magdalena Titirici,Ifan E L Stephenset al. In PRIME - the Pacific Rim Meeting on Electrochemical and Solid State Science (ECS), 2024, Honololu, Hawaii, United States Communication dans un congrès hal-04791270v1
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 Dubauet al. 74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France Communication dans un congrès hal-04206619v1
Importance du précurseur azoté sur les caractéristiques de catalyseurs Fe-N-C pour PEMFC Hongxin Ge,Kavita Kumar,Keyla Teixeira Santos,Nicolas Bibent,Laetitia Dubauet al. Colloque francophone du carbone, Société Francophone d'Etude des Carbones, May 2023, Gosier (Guadeloupe), France Communication dans un congrès hal-04206635v1
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 Didierjeanet al. 243rd Meeting of the Electrochemical Society, The Electrochemical Society, May 2023, Boston, United States Communication dans un congrès hal-04206603v1
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 Maillardet al. 74th Annual Meeting of the International Society of Electrochemistry, The International Society of Electrochemistry, Sep 2023, Lyon, France Communication dans un congrès hal-04259412v1
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 Maillardet al. 74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France Communication dans un congrès hal-04206625v1
Preferentially-shaped PtNi/C ORR nanocatalysts - Challenges towards their integration in MEA Camille Roiron,Raphaël Riasse,Vincent Martin,Kavita Kumar,Raphaël Chattotet al. 74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France Communication dans un congrès hal-04206594v1
Spontaneous ORR activity Drop of Fe-N-C Catalysts Upon Atmospheric Storage Keila Teixeira Santos,Kavita Kumar,Laetitia Dubau,Hongxin Ge,Sandrine Berthon-Fabryet al. 243rd Meeting of the Electrochemical Society, The Electrochemical Society, May 2023, Boston, United States Communication dans un congrès hal-04206610v1
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 Bibentet al. 74th Annual Meeting of the International Society of Electrochemistry, International Society of Electrochemistry, Sep 2023, Lyon, France Communication dans un congrès hal-04206622v1
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 Götzet al. In 244th Meeting of the Electrochemical Society, 2023, Gothenburg (Sweden), Sweden. pp.2035-2035, ⟨10.1149/MA2023-02412035mtgabs⟩ Communication dans un congrès hal-04791202v1
Stability of nanostructured Pt-based electrocatalysts for oxygen reduction reaction Raphaël Chattot,Camille Roiron,Kavita Kumar,V. Martin,Arnaud Violaet al. 13th Meeting on Nanoscience Advances, Sep 2022, Porquerolles, France Communication dans un congrès hal-03780395v1
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-03799664v1
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 Ripaet al. 2eme REUNION PLENIERE de la Fédération HYDROGENE (FRH2) du CNRS, CNRS, May 2022, Aussois, France Communication dans un congrès hal-03753859v1
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 Dubauet al. 241st ECS Meeting, The Electrochemical Society, May 2022, Vancouver, Canada Communication dans un congrès hal-03806976v1
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 Maillardet al. 241st ECS meeting, The Electrochemical Society, May 2022, Vancouver, Canada Communication dans un congrès hal-03806972v1
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 Dubauet al. 72nd Annual Meeting of the International Society of Electrochemistry, Jul 2021, Jeju Island, South Korea Communication dans un congrès hal-03504301v1
Fe-N-Carbon aerogel catalyst for oxygen reduction reaction Hongxin Ge,Frederic Jaouen,Nicolas Bibent,Kavita Kumar,Laetitia Dubauet al. EFCF 2021, Jun 2021, Lucerne (virtual), Switzerland Communication dans un congrès hal-03195353v1
Atomic Imaging of Fe, N-doped Carbon Electrocatalysts' Active Sites and Their Stability Tristan Asset,Kavita Kumar,Sheng Dai,Mingjie Xu,Yechuan Chenet al. 236th ECS Meeting of the Electrochemical Society, Oct 2019, Atlanta, United States Communication dans un congrès hal-02352230v1
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 Mermouxet al. Fundamentals of Fuel Cells (FDFC) 2019, Feb 2019, Nantes, France Communication dans un congrès hal-02480395v1
Iron-Nitrogen-Carbon (Fe-N-C) Active Sites Imaging By Scanning Transmission Electron Microscopy (STEM) Tristan Asset,Kavita Kumar,Sheng Dai,Mingjie Xu,Yechuan Chenet 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-04791111v1
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-04790996v1
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-04790977v1
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-04790954v1

Poster de conférence (6)

Investigation of pH fluctuations in water-in-salt electrolytes Arno Villalbi,Kavita Kumar,Claire Villevieille,David Riassetto International Society of Electrochemistry 2025, Sep 2025, Mayence, Germany Poster de conférence hal-05357724v1
Inductively Coupled Plasma Mass Spectrometry Serving Electrochemistry Vincent Martin,Kavita Kumar,Arnaud Viola,Camille Roiron,Laetitia Dubauet al. 37th Topical Meeting of ISE / Electrochemical Energy for a Greener and more Sustainable Future Society, Jun 2024, Stresa, Italy Poster de conférence hal-04642392v1
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 Portieret al. EuropaCat 2023 - 15th European Congress on Catalysis, Aug 2023, Prague, Czech Republic. Poster de conférence hal-04206614v1
Fe-based Single Atom Electrocatalyst Structure Probed by X-ray Emission Spectroscopy Viktoriia Saveleva,Kavita Kumar,Pascal Theis,Nicole Segura Salas,Ulrike Krammet al. Gordon Research Conference, Feb 2023, Lucca, Italy. , ⟨10.15151/ESRF-ES-799089889⟩ Poster de conférence hal-04005436v1
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 Mermouxet 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-03092491v1
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-04790889v1

Thèse (1)

Catalyseurs sans métaux nobles pour pile à combustible régénérative Kavita Kumar Catalyse. Université de Poitiers, 2017. Français. ⟨NNT : 2017POIT2284⟩ Thèse tel-01980719v1