World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 56 11747 10580 871 795 257 10108

Ken Sakai publications per year

The chart shows the history of publications by Ken Sakai between 1973 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ken Sakai published across 54 years, from 1973 to 2026, averaging 5.6 papers a year. Output peaked at 19 publications in 2003. 13 of the 301 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1973 to 2026. Vertical axis: number of publications, 0 to 19. Peak 19 publications in 2003. 1973: 2 publications 1974: 1 publication 1975: 0 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 0 publications 1983: 1 publication 1984: 1 publication 1985: 1 publication 1986: 5 publications 1987: 0 publications 1988: 2 publications 1989: 4 publications 1990: 9 publications 1991: 6 publications 1992: 9 publications 1993: 5 publications 1994: 2 publications 1995: 5 publications 1996: 15 publications 1997: 5 publications 1998: 7 publications 1999: 4 publications 2000: 4 publications 2001: 1 publication 2002: 5 publications 2003: 19 publications 2004: 15 publications 2005: 9 publications 2006: 3 publications 2007: 7 publications 2008: 8 publications 2009: 10 publications 2010: 10 publications 2011: 10 publications 2012: 11 publications 2013: 4 publications 2014: 9 publications 2015: 6 publications 2016: 11 publications 2017: 8 publications 2018: 8 publications 2019: 9 publications 2020: 2 publications 2021: 5 publications 2022: 5 publications 2023: 7 publications 2024: 18 publications 2025: 12 publications 2026: 1 publication
1973 2026

301 publications in total across all disciplines

View publications per year as a table
Ken Sakai: publications per year, 1973 to 2026
Year Publications
1973 2
1974 1
1975 0
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 0
1983 1
1984 1
1985 1
1986 5
1987 0
1988 2
1989 4
1990 9
1991 6
1992 9
1993 5
1994 2
1995 5
1996 15
1997 5
1998 7
1999 4
2000 4
2001 1
2002 5
2003 19
2004 15
2005 9
2006 3
2007 7
2008 8
2009 10
2010 10
2011 10
2012 11
2013 4
2014 9
2015 6
2016 11
2017 8
2018 8
2019 9
2020 2
2021 5
2022 5
2023 7
2024 18
2025 12
2026 1
Total 301
Download as CSV

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.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 241–260 publications, is where this scientist sits. 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
61–80 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.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100 257
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
Download as CSV

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.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 56–57 D-Index, is where this scientist sits. 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
40–41 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.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051 56
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
Download as CSV

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
Christopher H. Hendon
Christopher H. Hendon University of Oregon
Aron Walsh
Aron Walsh Imperial College London

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Chemistry in the USA opens doors to a variety of online degrees and career options. For those interested in legal aspects of chemical manufacturing or regulation, exploring a paralegal degree can provide essential knowledge and complement a science background.

Chemistry graduates often pursue careers in the pharmaceutical industry. Becoming a pharmaceutical sales representative offers an attractive salary and requires a clear understanding of chemistry concepts. To learn more about this role and compensation, check out the details on pharmaceutical rep salary.

For those interested in clinical roles, becoming a pharmacist is a challenging yet rewarding path. The educational requirements and rigorous nature of this career are well summarized in the guide on is it hard to become a pharmacist.

Finally, careers such as an autopsy technician combine chemistry knowledge with forensic science. This role involves specialized training, and more details about education and job outlook can be found on autopsy technician.

Best Scientists Citing Ken Sakai

Trending Scientists

Recently Published Articles