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Ken Sakai

D-Index & Metrics

Chemistry

D-Index
56
Citations
10108
World Ranking
11747
National Ranking
871

Ken Sakai 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 Ken Sakai 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: 257 publications — 51st percentile

51% of scientists in this discipline score the same or lower.

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

Ken Sakai 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 Ken Sakai 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: 56 D-Index — 36th percentile

36% of scientists in this discipline score the same or lower.

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

Overview

Ken Sakai is a researcher affiliated with Kyushu University in Japan, specializing in energy and materials science. Their work concentrates on renewable energy, sustainability, and materials chemistry, with a specific focus on CO2 reduction techniques and catalysts, advanced photocatalysis, and electrocatalysts for energy conversion.

Their recent publications include studies on photocatalytic CO2 reduction mechanisms, molecular photoanodes for water splitting, and photocatalytic hydrogen evolution. Key recent papers are:

  • Earth-Abundant Photocatalytic CO2 Reduction by Multielectron Chargeable Cobalt Porphyrin Catalysts: High CO/H2 Selectivity in Water Based on Phase Mismatch in Frontier MO Association, 2021, ACS Catalysis
  • Precious-Metal-Free CO2 Photoreduction Boosted by Dynamic Coordinative Interaction between Pyridine-Tethered Cu(I) Sensitizers and a Co(II) Catalyst, 2023, JACS Au
  • Highly Efficient and Stable Molecular-Based TiO2 Photoanodes for Photoelectrochemical Water Splitting Achieved by Pyridyl Anchoring Technique, 2023, ACS Catalysis
  • Controlling the Photofunctionality of a Polyanionic Heteroleptic Copper(I) Photosensitizer for CO2 Reduction Using Its Ion-pair Formation with Polycationic Ammonium in Aqueous Media, 2023, Angewandte Chemie International Edition
  • Redox tuning in Pt(bpy)-viologen catalyst-acceptor dyads enabling photocatalytic hydrogen evolution from water, 2021, Chemical Communications

The main research topics covered by their work include:

  • CO2 Reduction Techniques and Catalysts
  • Advanced Photocatalysis Techniques
  • Electrocatalysts for Energy Conversion
  • Carbon dioxide utilization in catalysis
  • Advanced Nanomaterials in Catalysis
  • Porphyrin and Phthalocyanine Chemistry
  • Metalloenzymes and iron-sulfur proteins

Their publications have appeared predominantly in the following journals and venues:

  • ACS Catalysis
  • Angewandte Chemie International Edition
  • Sustainable Energy & Fuels
  • Journal of the American Chemical Society
  • Angewandte Chemie

Frequent coauthors in their research collaborations include:

  • Kosei Yamauchi
  • Hironobu Ozawa
  • Xian Zhang
  • Ken Kawano
  • Chen Liao

Their scientific contributions span the development of molecular catalysts, photofunctional materials, and energy conversion technologies that support renewable energy and sustainability goals.

Best Publications

  • A photo-hydrogen-evolving molecular device driving visible-light-induced EDTA-reduction of water into molecular hydrogen.

    Hironobu Ozawa;Masa Aki Haga;Ken Sakai

  • The use of aurophilic and other metal–metal interactions as crystal engineering design elements to increase structural dimensionality

    Michael J. Katz;Ken Sakai;Daniel B. Leznoff

  • The Direct and Enantioselective, One-Pot, Three-Component, Cross-Mannich Reaction of Aldehydes†

    Yujiro Hayashi;Wataru Tsuboi;Itaru Ashimine;Tatsuya Urushima

  • Homogeneous catalysis of platinum(II) complexes in photochemical hydrogen production from water

    Ken Sakai;Hironobu Ozawa

  • Cobalt porphyrins as homogeneous catalysts for water oxidation

    Takashi Nakazono;Alexander Rene Parent;Alexander Rene Parent;Ken Sakai;Ken Sakai

  • Photo-hydrogen-evolving molecular devices driving visible-light-induced water reduction into molecular hydrogen: structure–activity relationship and reaction mechanism

    Hironobu Ozawa;Ken Sakai

  • Construction of Pseudo-Heterochiral and Homochiral Di-μ-oxotitanium(Schiff base) Dimers and Enantioselective Epoxidation Using Aqueous Hydrogen Peroxide

    Kazuhiro Matsumoto;Yuji Sawada;Bunnai Saito;Ken Sakai

  • Highly Efficient and Selective Photocatalytic CO2 Reduction to CO in Water by a Cobalt Porphyrin Molecular Catalyst

    Arnau Call;Mihaela Cibian;Keiya Yamamoto;Takashi Nakazono

  • Clear Evidence Showing the Robustness of a Highly Active Oxygen-evolving Mononuclear Ruthenium Complex with an Aqua Ligand

    Shigeyuki Masaoka;Ken Sakai

  • Visible light-induced water oxidation catalyzed by molybdenum-based polyoxometalates with mono- and dicobalt(III) cores as oxygen-evolving centers.

    Saya Tanaka;Masahiko Annaka;Ken Sakai

  • Inside Cover: Near-Infrared Light-Driven Hydrogen Evolution from Water Using a Polypyridyl Triruthenium Photosensitizer (Angew. Chem. Int. Ed. 1/2018)

    Yutaro Tsuji;Keiya Yamamoto;Kosei Yamauchi;Ken Sakai

  • Structures and Reactivities of Platinum-Blues and the Related Amidate-Bridged Platinumiii Compounds

    Kazuko Matsumoto;Ken Sakai

  • Progress in Base‐Metal Water Oxidation Catalysis

    Alexander R.ene Parent;Ken Sakai;Ken Sakai

  • Syntheses, characterization, and photo-hydrogen-evolving properties of tris(2,2′-bipyridine)ruthenium(II) derivatives tethered to a cis-Pt(II)Cl2 unit: insights into the structure–activity relationship

    Hironobu Ozawa;Yuki Yokoyama;Masa Aki Haga;Ken Sakai

  • Syntheses and properties of emissive iridium(III) complexes with tridentate benzimidazole derivatives.

    Tomona Yutaka;Shinya Obara;Satoshi Ogawa;Koichi Nozaki

  • Catalysis of mononuclear aquaruthenium complexes in oxygen evolution from water: a new radical coupling path using hydroxocerium(IV) species.

    Masaki Yoshida;Shigeyuki Masaoka;Shigeyuki Masaoka;Jiro Abe;Ken Sakai

  • Tuning of redox potentials by introducing a cyclometalated bond to bis-tridentate ruthenium(II) complexes bearing bis(N-methylbenzimidazolyl)benzene or -pyridine ligands.

    Wen Wen Yang;Yu Wu Zhong;Shinpei Yoshikawa;Jiang Yang Shao

  • Syntheses, Crystal Structures, and Electronic, ESR, and x-ray Photoelectron Spectra of Acetamidate-and 2-Fluoroacetamidate-Bridged Mixed-Valent Octanuclear Platinum Blues

    Kazuko Matsumoto;Ken Sakai;Kyosuke Nishio;Yasuhiro Tokisue

  • New Structural Aspects of α-Pyrrolidinonate- and α-Pyridonate-Bridged, Homo- and Mixed-Valence, Di- and Tetranuclear cis-Diammineplatinum Complexes: Eight New Crystal Structures, Stoichiometric 1:1 Mixture of Pt(2.25+)4 and Pt(2.5+)4, New Quasi-One-Dimensional Halide-Bridged [Pt(2.5+)4-Cl···]∞ System, and Consideration of Solution Properties

    Ken Sakai;Yuko Tanaka;Yuriko Tsuchiya;Kentaro Hirata

  • Photochemical CO2 Reduction Driven by Water-Soluble Copper(I) Photosensitizer with the Catalysis Accelerated by Multi-Electron Chargeable Cobalt Porphyrin

    Xian Zhang;Mihaela Cibian;Mihaela Cibian;Arnau Call;Kosei Yamauchi;Kosei Yamauchi

  • Kinetics and DFT studies on water oxidation by Ce4+ catalyzed by [Ru(terpy)(bpy)(OH2)]2+.

    Ayano Kimoto;Kosei Yamauchi;Masaki Yoshida;Shigeyuki Masaoka;Shigeyuki Masaoka

Frequent Co-Authors

Takashi Kajiwara
Takashi Kajiwara Nara Women's University
Tasuku Ito
Tasuku Ito Tohoku University
Masa-aki Haga
Masa-aki Haga Chuo University
Yujiro Hayashi
Yujiro Hayashi Tohoku University
Heinz-Bernhard Kraatz
Heinz-Bernhard Kraatz University of Toronto
Licheng Sun
Licheng Sun Royal Institute of Technology
Hideaki Kakeya
Hideaki Kakeya Kyoto University
Hiroyuki Osada
Hiroyuki Osada RIKEN
Christopher H. Hendon
Christopher H. Hendon University of Oregon
Aron Walsh
Aron Walsh Imperial College London

External Links

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Best Scientists Citing Ken Sakai

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