World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
80
Citations
21053
World Ranking
3452
National Ranking
201

Osamu Ishitani 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 Osamu Ishitani 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: 233 publications — 44th percentile

44% of scientists in this discipline score the same or lower.

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

Osamu Ishitani 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 Osamu Ishitani 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: 80 D-Index — 81st percentile

81% of scientists in this discipline score the same or lower.

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

Overview

Osamu Ishitani is affiliated with the Tokyo Institute of Technology in Japan and has a research focus predominantly in the fields of energy and materials science. Their work spans a variety of subfields including renewable energy, sustainability and the environment, materials chemistry, process chemistry and technology, inorganic chemistry, and organic chemistry.

The scientist's research centers on several main topics related to catalysis and energy conversion. These include CO2 reduction techniques and catalysts, advanced photocatalysis techniques, carbon dioxide utilization in catalysis, catalytic processes in materials science, electrocatalysts for energy conversion, metal-organic frameworks synthesis and applications, and radical photochemical reactions.

Notable recent publications by Osamu Ishitani encompass the following:

  • Efficient Visible-Light-Driven CO2 Reduction by a Cobalt Molecular Catalyst Covalently Linked to Mesoporous Carbon Nitride, 2020, Journal of the American Chemical Society
  • Best practices for experiments and reporting in photocatalytic CO2 reduction, 2023, Nature Catalysis
  • Photocatalytic Systems for CO2 Reduction: Metal-Complex Photocatalysts and Their Hybrids with Photofunctional Solid Materials, 2022, Accounts of Chemical Research
  • An Artificial Z-Scheme Constructed from Dye-Sensitized Metal Oxide Nanosheets for Visible Light-Driven Overall Water Splitting, 2020, Journal of the American Chemical Society
  • Utilization of Low-Concentration CO2 with Molecular Catalysts Assisted by CO2-Capturing Ability of Catalysts, Additives, or Reaction Media, 2022, Journal of the American Chemical Society

They have frequently collaborated with several co-authors, including Yusuke Tamaki, Kazuhiko Maeda, Kei Kamogawa, Yasuomi Yamazaki, and Hiromu Kumagai.

Osamu Ishitani's work is often published in venues such as the Journal of the American Chemical Society, ACS Catalysis, Chemical Science, The Cambridge Structural Database, and ECS Meeting Abstracts.

Best Publications

  • Development of an Efficient Photocatalytic System for CO2 Reduction Using Rhenium(I) Complexes Based on Mechanistic Studies

    Hiroyuki Takeda;Kazuhide Koike;Haruo Inoue;Osamu Ishitani

  • Electrons, Photons, Protons and Earth-Abundant Metal Complexes for Molecular Catalysis of CO2 Reduction

    Hiroyuki Takeda;Claudio Cometto;Osamu Ishitani;Marc Robert

  • Development of efficient photocatalytic systems for CO2 reduction using mononuclear and multinuclear metal complexes based on mechanistic studies

    Hiroyuki Takeda;Osamu Ishitani

  • Visible‐Light‐Driven CO2 Reduction with Carbon Nitride: Enhancing the Activity of Ruthenium Catalysts

    Ryo Kuriki;Keita Sekizawa;Keita Sekizawa;Osamu Ishitani;Kazuhiko Maeda

  • Photocatalytic reduction of CO2 using metal complexes

    Yasuomi Yamazaki;Hiroyuki Takeda;Osamu Ishitani

  • Nature-Inspired, Highly Durable CO2 Reduction System Consisting of a Binuclear Ruthenium(II) Complex and an Organic Semiconductor Using Visible Light.

    Ryo Kuriki;Hironori Matsunaga;Takuya Nakashima;Keisuke Wada

  • Artificial Z-scheme constructed with a supramolecular metal complex and semiconductor for the photocatalytic reduction of CO2.

    Keita Sekizawa;Kazuhiko Maeda;Kazuhiko Maeda;Kazunari Domen;Kazuhide Koike

  • Architecture of Supramolecular Metal Complexes for Photocatalytic CO2 Reduction: Ruthenium−Rhenium Bi- and Tetranuclear Complexes

    Bobak Gholamkhass;Hiroaki Mametsuka;Kazuhide Koike;Toyoaki Tanabe

  • Photoelectrochemical Reduction of CO2 Coupled to Water Oxidation Using a Photocathode with a Ru(II)–Re(I) Complex Photocatalyst and a CoOx/TaON Photoanode

    Go Sahara;Hiromu Kumagai;Kazuhiko Maeda;Nicolas Kaeffer

  • Photochemical reduction of CO₂ using TiO₂: effects of organic adsorbates on TiO₂ and deposition of Pd onto TiO₂.

    Tatsuto Yui;Akira Kan;Chieko Saitoh;Kazuhide Koike

  • Photocatalytic CO2 reduction with high turnover frequency and selectivity of formic acid formation using Ru(II) multinuclear complexes

    Yusuke Tamaki;Tatsuki Morimoto;Kazuhide Koike;Osamu Ishitani

  • A Highly Efficient Mononuclear Iridium Complex Photocatalyst for CO2 Reduction under Visible Light

    Shunsuke Sato;Takeshi Morikawa;Tsutomu Kajino;Osamu Ishitani

  • Substantial improvement in the efficiency and durability of a photocatalyst for carbon dioxide reduction using a benzoimidazole derivative as an electron donor

    Yusuke Tamaki;Kazuhide Koike;Tatsuki Morimoto;Osamu Ishitani

  • Photocatalytic CO2 reduction using a Mn complex as a catalyst

    Hiroyuki Takeda;Hiroki Koizumi;Kouhei Okamoto;Osamu Ishitani

  • Robust Binding between Carbon Nitride Nanosheets and a Binuclear Ruthenium(II) Complex Enabling Durable, Selective CO2 Reduction under Visible Light in Aqueous Solution

    Ryo Kuriki;Muneaki Yamamoto;Kimitaka Higuchi;Yuta Yamamoto

  • Photocatalytic CO2 Reduction Using Cu(I) Photosensitizers with a Fe(II) Catalyst.

    Hiroyuki Takeda;Kenji Ohashi;Akiko Sekine;Osamu Ishitani

  • Supramolecular Photocatalysts for the Reduction of CO2

    Yusuke Tamaki;Osamu Ishitani

  • Reaction mechanisms of catalytic photochemical CO2 reduction using Re(I) and Ru(II) complexes

    Yusuke Kuramochi;Osamu Ishitani;Hitoshi Ishida

  • A polymeric-semiconductor–metal-complex hybrid photocatalyst for visible-light CO2 reduction

    Kazuhiko Maeda;Kazuhiko Maeda;Keita Sekizawa;Osamu Ishitani

  • Efficient Visible-Light-Driven CO2 Reduction by a Cobalt Molecular Catalyst Covalently Linked to Mesoporous Carbon Nitride

    Bing Ma;Gui Chen;Claire Fave;Lingjing Chen

  • Photocatalytic reduction of carbon dioxide to methane and acetic acid by an aqueous suspension of metal-deposited TiO2

    Osamu Ishitani;Chieko Inoue;Yuji Suzuki;Takashi Ibusuki

Frequent Co-Authors

Kazuhide Koike
Kazuhide Koike National Institute of Advanced Industrial Science and Technology
Kazuhiko Maeda
Kazuhiko Maeda Institute of Science Tokyo
Akira Yamakata
Akira Yamakata Okayama University
Yoshiharu Uchimoto
Yoshiharu Uchimoto Kyoto University
Ryu Abe
Ryu Abe Kyoto University
Shozo Yanagida
Shozo Yanagida Osaka University
Akihiko Kudo
Akihiko Kudo Tokyo University of Science
Devens Gust
Devens Gust Arizona State University
Shinji Inagaki
Shinji Inagaki Toyota Central Research and Development Laboratories (Japan)
Thomas E. Mallouk
Thomas E. Mallouk University of Pennsylvania

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