World's Best Scientists 2026 revealed!
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Saim Özkar
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Chemistry
Turkey
2026

D-Index & Metrics

Chemistry

D-Index
79
Citations
17310
World Ranking
3708
National Ranking
10

Saim Özkar publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Saim Özkar sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 308 publications — 65th percentile

65% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Saim Özkar D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Saim Özkar sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 79 D-Index — 80th percentile

80% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Chemistry in Turkey Leader Award
  • 2025 - Research.com Chemistry in Turkey Leader Award
  • 2022 - Research.com Chemistry in Turkey Leader Award
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry
  • The Science Academy Society of Turkey - Bilim Akademisi Chemistry

Overview

Saim Özkar is affiliated with Middle East Technical University in Turkey and has contributed extensively to the fields of Materials Science, Chemical Engineering, and Energy. Their research spans several specific subfields including Materials Chemistry, Catalysis, Energy Engineering and Power Technology, Renewable Energy, Sustainability and the Environment, and Atmospheric Science.

The research topics covered by Özkar include:

  • Hydrogen Storage and Materials
  • Ammonia Synthesis and Nitrogen Reduction
  • Hybrid Renewable Energy Systems
  • Nanoparticles nucleation surface interactions
  • Boron and Carbon Nanomaterials Research
  • Coagulation and Flocculation Studies
  • Advanced battery technologies research

Among recent publications authored or co-authored by Özkar are:

  • "LaMer's 1950 model of particle formation: a review and critical analysis of its classical nucleation and fluctuation theory basis, of competing models and mechanisms for phase-changes and particle formation, and then of its application to silver halide, semiconductor, metal, and metal-oxide nanoparticles" (2020), published in Materials Advances
  • "Cobalt ferrite supported platinum nanoparticles: Superb catalytic activity and outstanding reusability in hydrogen generation from the hydrolysis of ammonia borane" (2021), Journal of Colloid and Interface Science
  • "Magnetically Separable Rh0/Co3O4 Nanocatalyst Provides over a Million Turnovers in Hydrogen Release from Ammonia Borane" (2020), ACS Sustainable Chemistry & Engineering
  • "Magnetically Isolable Pt0/Co3O4 Nanocatalysts: Outstanding Catalytic Activity and High Reusability in Hydrolytic Dehydrogenation of Ammonia Borane" (2021), ACS Applied Materials & Interfaces
  • "A review on platinum(0) nanocatalysts for hydrogen generation from the hydrolysis of ammonia borane" (2021), Dalton Transactions

Özkar has published predominantly in several key academic journals, including:

  • International Journal of Hydrogen Energy
  • SSRN Electronic Journal
  • Journal of Colloid and Interface Science
  • The Journal of Physical Chemistry C
  • Journal of Alloys and Compounds

Frequent collaborators include:

  • Serdar Akbayrak
  • Richard G. Finke
  • Yalçın Tonbul
  • Gülhan Çakmak
  • Tayfur Öztürk

The scientist has been recognized by The Science Academy Society of Turkey - Bilim Akademisi for contributions in chemistry.

Best Publications

  • Monodisperse nickel nanoparticles and their catalysis in hydrolytic dehydrogenation of ammonia borane.

    Oender Metin;Vismadeb Mazumder;Saim Ozkar;Shouheng Sun

  • Nanocluster Formation and Stabilization Fundamental Studies: Ranking Commonly Employed Anionic Stabilizers via the Development, Then Application, of Five Comparative Criteria

    Saim Ozkar;Richard G Finke

  • Metal nanoparticles in liquid phase catalysis; from recent advances to future goals

    Mehmet Zahmakıran;Saim Özkar

  • Hydrogen generation from hydrolysis of sodium borohydride using Ru(0) nanoclusters as catalyst

    Saim Ozkar;M Zahmakiran

  • Water-soluble poly(4-styrenesulfonic acid-co-maleic acid) stabilized ruthenium(0) and palladium(0) nanoclusters as highly active catalysts in hydrogen generation from the hydrolysis of ammonia–borane

    Önder Metin;Şule Şahin;Saim Özkar

  • Ammonia borane as hydrogen storage materials

    Serdar Akbayrak;Saim Özkar

  • Ceria supported rhodium nanoparticles: Superb catalytic activity in hydrogen generation from the hydrolysis of ammonia borane

    Serdar Akbayrak;Yalçın Tonbul;Yalçın Tonbul;Saim Özkar

  • Hydrogen Generation from the Hydrolysis of Ammonia-borane and Sodium Borohydride Using Water-soluble Polymer-stabilized Cobalt(0) Nanoclusters Catalyst

    Önder Metin;Saim Özkar

  • LaMer’s 1950 Model for Particle Formation ofInstantaneous Nucleation and Diffusion-Controlled Growth: A HistoricalLook at the Model’s Origins, Assumptions, Equations, and UnderlyingSulfur Sol Formation Kinetics Data

    Christopher B. Whitehead;Saim Özkar;Richard G. Finke

  • Ruthenium(0) nanoparticles supported on multiwalled carbon nanotube as highly active catalyst for hydrogen generation from ammonia-borane.

    Serdar Akbayrak;Saim Özkar

  • Is it homogeneous or heterogeneous catalysis derived from [RhCp*Cl2]2? In operando XAFS, kinetic, and crucial kinetic poisoning evidence for subnanometer Rh4 cluster-based benzene hydrogenation catalysis.

    Ercan Bayram;John C. Linehan;John L. Fulton;John A. S. Roberts

  • Ruthenium(0) nanoclusters stabilized by a Nanozeolite framework: isolable, reusable, and green catalyst for the hydrogenation of neat aromatics under mild conditions with the unprecedented catalytic activity and lifetime.

    Mehmet Zahmakıran;Yalçın Tonbul;Saim Özkar

  • Water soluble laurate-stabilized ruthenium(0) nanoclusters catalyst for hydrogen generation from the hydrolysis of ammonia-borane: High activity and long lifetime

    Feyyaz Durap;Mehmet Zahmakıran;Saim Özkar

  • Palladium(0) nanoparticles supported on polydopamine coated CoFe2O4 as highly active, magnetically isolable and reusable catalyst for hydrogen generation from the hydrolysis of ammonia borane

    Joydev Manna;Serdar Akbayrak;Saim Özkar

  • Analysis of Nanoparticle Transmission Electron Microscopy Data Using a Public- Domain Image-Processing Program, Image

    Gerd H. Woehrle;James E. Hutchison;Saim Özkar;Richard G. Finke

  • Zeolite framework stabilized rhodium(0) nanoclusters catalyst for the hydrolysis of ammonia-borane in air: Outstanding catalytic activity, reusability and lifetime

    Mehmet Zahmakıran;Saim Özkar

  • Zeolite-confined ruthenium(0) nanoclusters catalyst: record catalytic activity, reusability, and lifetime in hydrogen generation from the hydrolysis of sodium borohydride.

    Mehmet Zahmakiran;Saim Özkar

  • Facile Synthesis of Three-Dimensional Pt-TiO2 Nano-networks: A Highly Active Catalyst for the Hydrolytic Dehydrogenation of Ammonia–Borane

    Mohammad Aref Khalily;Hamit Eren;Serdar Akbayrak;Hepi Hari Susapto

  • Hydroxyapatite-supported cobalt(0) nanoclusters as efficient and cost-effective catalyst for hydrogen generation from the hydrolysis of both sodium borohydride and ammonia-borane

    Murat Rakap;Saim Özkar

  • Water soluble nickel(0) and cobalt(0) nanoclusters stabilized by poly(4-styrenesulfonic acid-co-maleic acid): Highly active, durable and cost effective catalysts in hydrogen generation from the hydrolysis of ammonia borane

    Önder Metin;Saim Özkar

Frequent Co-Authors

Mehmet Zahmakiran
Mehmet Zahmakiran Bartin University
Richard G. Finke
Richard G. Finke Colorado State University
Önder Metin
Önder Metin Koç University
Geoffrey A. Ozin
Geoffrey A. Ozin University of Toronto
Inci Eroglu
Inci Eroglu Middle East Technical University
Mojtaba Bagherzadeh
Mojtaba Bagherzadeh Sharif University of Technology
Bruno Chaudret
Bruno Chaudret Paul Sabatier University
Karine Philippot
Karine Philippot Federal University of Toulouse Midi-Pyrénées
Judith C. Yang
Judith C. Yang Brookhaven National Laboratory
Anatoly I. Frenkel
Anatoly I. Frenkel Stony Brook University

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Best Scientists Citing Saim Özkar

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Wuhan University

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Colorado State University

Publications: 28

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Publications: 27

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