Jaan Leis

ORCID: 0000-0002-3352-5909
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About
Contact & Profiles
Research Areas
  • Electrocatalysts for Energy Conversion
  • Fuel Cells and Related Materials
  • Advanced battery technologies research
  • Supercapacitor Materials and Fabrication
  • Conducting polymers and applications
  • Electrochemical Analysis and Applications
  • Advancements in Battery Materials
  • Catalytic Processes in Materials Science
  • Advanced Battery Materials and Technologies
  • Electrochemical sensors and biosensors
  • Ionic liquids properties and applications
  • Catalysis and Hydrodesulfurization Studies
  • Advanced materials and composites
  • Diamond and Carbon-based Materials Research
  • Graphene research and applications
  • Molecular spectroscopy and chirality
  • Analytical Chemistry and Chromatography
  • Microbial Fuel Cells and Bioremediation
  • Metal-Organic Frameworks: Synthesis and Applications
  • Advanced ceramic materials synthesis
  • Polyoxometalates: Synthesis and Applications
  • Dielectric materials and actuators
  • Nanomaterials for catalytic reactions
  • Chemical Thermodynamics and Molecular Structure
  • Advanced Sensor and Energy Harvesting Materials

University of Tartu
2016-2025

Skeleton Technologies (Estonia)
2016-2024

Université de Versailles Saint-Quentin-en-Yvelines
2019

University of Girona
2019

Institut Català d'Investigació Química
2019

McGill University
2019

Tallinn University of Technology
2019

University of St Andrews
2019

Showa Pharmaceutical University
2019

Zhejiang University of Technology
2019

Transition-metal- and nitrogen-codoped carbide-derived carbon/carbon nanotube composites (M-N-CDC/CNT) have been prepared, characterized, used as cathode catalysts in anion-exchange membrane fuel cells (AEMFCs). As transition metals, cobalt, iron, a combination of both investigated. Metal nitrogen are doped through simple high-temperature pyrolysis technique with 1,10-phenanthroline the N precursor. The physicochemical characterization shows success metal doping well very similar...

10.1021/acscatal.0c03511 article EN cc-by ACS Catalysis 2021-01-28

A facile method for the preparation of precious metal-free catalysts oxygen reduction reaction (ORR) from lignin, dicyandiamide, and transition metal salts is presented. Magnesium acetate was employed as a precursor sacrificial template, enhancing porous structure catalysts. Iron content in catalyst materials optimized bimetallic containing Fe Co also prepared. The physicochemical analysis revealed uniform dispersion various nitrogen moieties centers on sheet-like carbon structures, along...

10.1021/acscatal.4c02136 article EN cc-by ACS Catalysis 2024-06-03

We study the physico-chemical properties and electrocatalytic activity towards oxygen reduction of two Fe–N–C catalysts based on carbide derived carbon.

10.1039/c8ta02325e article EN Journal of Materials Chemistry A 2018-01-01

Cobalt- and nitrogen-doped carbide-derived carbon/carbon nanotube (CDC/CNT) composites are prepared used as oxygen reduction reaction (ORR) electrocatalysts for an anion exchange membrane fuel cell (AEMFC) cathode. For the doping, high-temperature pyrolysis is applied using a cobalt salt nitrogen precursor (either dicyandiamide, urea, or melamine). During (i) new mesopores formed confirmed by N2 physisorption results, (ii) atomically dispersed present on catalysts detected scanning...

10.1021/acsaem.0c00381 article EN ACS Applied Energy Materials 2020-05-12

In this work, doped nanocarbon electrocatalysts for electrochemical oxygen reduction reaction (ORR) are prepared by high-temperature pyrolysis from Honeyol, cobalt and iron salts, dicyandiamide. MgO-based inorganic templates further used to increase the mesoporosity of catalyst materials. The templated bimetallic electrocatalyst containing (FeCoNC-MgOAc) showed excellent stability remarkable ORR performance in rotating disk electrode testing alkaline conditions. was tested anion-exchange...

10.1021/acscatal.2c03683 article EN ACS Catalysis 2022-11-01

Abstract Iron and nickel phthalocyanines along with different carbon supports, i. e., multi‐walled nanotubes (MWCNT), graphene, carbide‐derived carbon, Vulcan mesoporous (MC, from Pajarito Powder, LLC), are used to prepare six bimetallic (Fe, Ni) N‐doped carbon‐based catalysts. The aim of this work is investigate the electrocatalytic activity bimetal phthalocyanine‐modified nanocarbon catalysts, e. g., effect supports on oxygen reduction reaction (ORR) evolution (OER), including...

10.1002/celc.202200717 article EN ChemElectroChem 2022-09-13

Realizing high-performance and long-life rechargeable zinc-air batteries (ZABs) requires developing highly efficient robust bifunctional electrocatalysts for oxygen reduction reaction (ORR) evolution (OER), as the low efficiency...

10.1039/d5se00072f article EN cc-by Sustainable Energy & Fuels 2025-01-01

Abstract A simple synthesis method was used to prepare an active oxygen reduction reaction (ORR) electrocatalyst based on iron and nitrogen co‐doped graphene for polymer electrolyte fuel cell applications. For the of ORR catalysts, two different graphene‐based materials, commercially available (Gra) oxide (GO), were as carbon substrates. The half‐cell experiments conducted by using rotating disc electrode (RDE) revealed that Fe−N−Gra showed much higher electrocatalytic activity than Fe−N−GO...

10.1002/celc.202000011 article EN ChemElectroChem 2020-03-23
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