World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
42
Citations
11250
World Ranking
17375
National Ranking
1372

Zyun Siroma 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 Zyun Siroma 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: 137 publications — 10th percentile

10% of scientists in this discipline score the same or lower.

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

Zyun Siroma 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 Zyun Siroma 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: 42 D-Index — 3rd percentile

3% of scientists in this discipline score the same or lower.

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

Overview

Zyun Siroma is affiliated with the National Institute of Advanced Industrial Science and Technology in Japan. Their research primarily intersects the fields of Engineering and Materials Science, with particular focus on subfields such as Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment, Automotive Engineering, and Polymers and Plastics.

The main topics addressed in their work include Fuel Cells and Related Materials, Advancements in Battery Materials, Electrocatalysts for Energy Conversion, Advanced Battery Technologies Research, Advanced Battery Materials and Technologies, Catalytic Processes in Materials Science, and Analytical Chemistry and Sensors.

The scientist has contributed to multiple research publications spanning several peer-reviewed venues. Frequent publication sources include Electrochemistry, ECS Meeting Abstracts, Electroanalysis, Chemistry of Materials, and Journal of Electroanalytical Chemistry.

Among recent publications associated with or relevant to their research are:

  • Multi-rail transmission-line model as an equivalent circuit for electrochemical impedance of a porous electrode, 2020, Journal of Electroanalytical Chemistry
  • Electrochemical Impedance Spectroscopy Part 1: Fundamentals, 2022, Electrochemistry
  • Electrochemical Impedance Spectroscopy Part 2: Applications, 2022, Electrochemistry
  • Effect of rotating disk electrode conditions on oxygen evolution reaction activity of Ir nanoparticle catalysts and comparison with membrane and electrode assemblies, 2022, International Journal of Hydrogen Energy
  • Electrochemical CO oxidation by a Rh tetraaza[14]annulene-based catalyst, 2020, ChemCatChem

The scientist collaborates frequently with other researchers, including Tsutomu Ioroi, T. Nagai, Tetsu Kiyobayashi, Hirotada Gamo, and Yasushi Maeda.

Best Publications

  • Scientific aspects of polymer electrolyte fuel cell durability and degradation.

    Rodney Borup;Jeremy Meyers;Bryan Pivovar;Yu Seung Kim

  • Thin film electrocatalyst layer for unitized regenerative polymer electrolyte fuel cells

    Tsutomu Ioroi;Kazuaki Yasuda;Zyun Siroma;Naoko Fujiwara

  • Platinum dissolution and deposition in the polymer electrolyte membrane of a PEM fuel cell as studied by potential cycling

    Kazuaki Yasuda;Akira Taniguchi;Tomoki Akita;Tsutomu Ioroi

  • Sub-stoichiometric titanium oxide-supported platinum electrocatalyst for polymer electrolyte fuel cells

    Tsutomu Ioroi;Zyun Siroma;Naoko Fujiwara;Shin-ichi Yamazaki

  • High-capacity organic positive-electrode material based on a benzoquinone derivative for use in rechargeable lithium batteries

    Masaru Yao;Hiroshi Senoh;Shin-ichi Yamazaki;Zyun Siroma

  • Potential application of anion-exchange membrane for hydrazine fuel cell electrolyte

    Koji Yamada;Kazuaki Yasuda;Naoko Fujiwara;Zyun Siroma

  • Stability of Corrosion-Resistant Magnéli-Phase Ti4O7-Supported PEMFC Catalysts at High Potentials

    Tsutomu Ioroi;Hiroshi Senoh;Shin-ichi Yamazaki;Zyun Siroma

  • Electrocatalysts for PEM Fuel Cells

    Tsutomu Ioroi;Zyun Siroma;Shin‐ichi Yamazaki;Kazuaki Yasuda

  • Electrochemical Scanning Tunneling Microscopy Observation of Highly Oriented Pyrolytic Graphite Surface Reactions in an Ethylene Carbonate-Based Electrolyte Solution

    Minoru Inaba;Zyun Siroma;Atsushi Funabiki;Zempachi Ogumi

  • A fuel cell with selective electrocatalysts using hydrogen peroxide as both an electron acceptor and a fuel

    Shin-ichi Yamazaki;Zyun Siroma;Hiroshi Senoh;Tsutomu Ioroi

  • Direct ethanol fuel cells using an anion exchange membrane

    Naoko Fujiwara;Zyun Siroma;Shin-ichi Yamazaki;Tsutomu Ioroi

  • Analytical TEM study of Pt particle deposition in the proton-exchange membrane of a membrane-electrode-assembly

    Tomoki Akita;Akira Taniguchi;Junko Maekawa;Zyun Siroma

  • Depression of proton conductivity in recast Nafion® film measured on flat substrate

    Zyun Siroma;Ryou Kakitsubo;Naoko Fujiwara;Tsutomu Ioroi

  • Ionic Conduction in Lithium Ion Battery Composite Electrode Governs Cross-sectional Reaction Distribution

    Yuki Orikasa;Yuma Gogyo;Hisao Yamashige;Misaki Katayama

  • Electrochemical scanning tunneling microscopy analysis of the surface reactions on graphite basal plane in ethylene carbonate-based solvents and propylene carbonate

    Minoru Inaba;Zyun Siroma;Yutaka Kawatate;Atsushi Funabiki

  • A two-compartment cell for using soluble benzoquinone derivatives as active materials in lithium secondary batteries

    Hiroshi Senoh;Masaru Yao;Hikari Sakaebe;Kazuaki Yasuda

  • AC impedance analysis of ionic and electronic conductivities in electrode mixture layers for an all-solid-state lithium-ion battery

    Zyun Siroma;Tomohiro Sato;Tomonari Takeuchi;Ryo Nagai

  • Nonenzymatic glucose fuel cells with an anion exchange membrane as an electrolyte

    Naoko Fujiwara;Shin-ichi Yamazaki;Zyun Siroma;Tsutomu Ioroi

  • Dissolution of Nafion® membrane and recast Nafion® film in mixtures of methanol and water

    Z. Siroma;N. Fujiwara;T. Ioroi;S. Yamazaki

  • Platinum and molybdenum oxide deposited carbon electrocatalyst for oxidation of hydrogen containing carbon monoxide

    Tsutomu Ioroi;Naoko Fujiwara;Zyun Siroma;Kazuaki Yasuda

Frequent Co-Authors

Tsutomu Ioroi
Tsutomu Ioroi National Institute of Advanced Industrial Science and Technology
Kazuaki Yasuda
Kazuaki Yasuda National Institute of Advanced Industrial Science and Technology
Minoru Inaba
Minoru Inaba Doshisha University
Tomoki Akita
Tomoki Akita National Institute of Advanced Industrial Science and Technology
Zempachi Ogumi
Zempachi Ogumi Kyoto University
Susumu Kuwabata
Susumu Kuwabata Osaka University
Yoshiharu Uchimoto
Yoshiharu Uchimoto Kyoto University
Hajime Matsumoto
Hajime Matsumoto National Institute of Advanced Industrial Science and Technology
Yuki Orikasa
Yuki Orikasa Ritsumeikan University
Tetsuhiko Kobayashi
Tetsuhiko Kobayashi National Institute of Advanced Industrial Science and Technology

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