World's Best Scientists 2026 revealed!

D-Index & Metrics

Engineering and Technology

D-Index
63
Citations
10896
World Ranking
1836
National Ranking
116

John Greenman publication distribution in Engineering and Technology in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Engineering and Technology in 2026. The highlighted bar marks where John Greenman sits on this spectrum.

38–47 publications: 20 scientists 48–57 publications: 35 scientists 58–67 publications: 96 scientists 68–77 publications: 135 scientists 78–87 publications: 190 scientists 88–97 publications: 259 scientists 98–107 publications: 283 scientists 108–117 publications: 369 scientists 118–127 publications: 341 scientists 128–137 publications: 386 scientists 138–147 publications: 372 scientists 148–157 publications: 457 scientists 158–167 publications: 415 scientists 168–177 publications: 407 scientists 178–187 publications: 421 scientists 188–197 publications: 378 scientists 198–207 publications: 403 scientists 208–217 publications: 317 scientists 218–227 publications: 346 scientists 228–237 publications: 321 scientists 238–247 publications: 260 scientists 248–257 publications: 280 scientists 258–267 publications: 240 scientists 268–277 publications: 214 scientists 278–287 publications: 242 scientists 288–297 publications: 203 scientists 298–307 publications: 166 scientists 308–317 publications: 154 scientists 318–327 publications: 175 scientists 328–337 publications: 159 scientists 338–347 publications: 99 scientists 348–357 publications: 131 scientists 358–367 publications: 106 scientists 368–377 publications: 118 scientists 378–387 publications: 97 scientists 388–397 publications: 108 scientists 398–407 publications: 82 scientists 408–417 publications: 71 scientists 418–427 publications: 64 scientists 428–437 publications: 55 scientists 438–447 publications: 54 scientists 448–457 publications: 60 scientists 458–467 publications: 47 scientists 468–477 publications: 40 scientists 478–487 publications: 30 scientists 488–497 publications: 29 scientists 498–507 publications: 38 scientists 508–517 publications: 40 scientists 518–527 publications: 32 scientists 528–537 publications: 23 scientists 538–547 publications: 28 scientists 548–557 publications: 23 scientists 558–567 publications: 19 scientists 568–577 publications: 16 scientists 578–587 publications: 17 scientists 588–597 publications: 18 scientists 598–607 publications: 22 scientists 608–617 publications: 15 scientists 618–627 publications: 9 scientists 628–637 publications: 11 scientists 638–647 publications: 21 scientists 648–657 publications: 12 scientists 658–667 publications: 9 scientists 668–677 publications: 11 scientists 678–687 publications: 9 scientists 688–697 publications: 6 scientists 698–707 publications: 14 scientists 708–717 publications: 7 scientists 718–727 publications: 8 scientists 728–737 publications: 10 scientists 738–747 publications: 9 scientists 748–757 publications: 5 scientists 758–767 publications: 5 scientists 768–777 publications: 11 scientists 778–787 publications: 7 scientists 788–797 publications: 2 scientists 798–803 publications: 4 scientists 804+ publications: 100 scientists
38 publications 804+

This scientist: 212 publications — 52nd percentile

52% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 804 publications or more.

John Greenman D-index placement in Engineering and Technology in 2026

The chart shows the D-index (discipline H-index) distribution of Engineering and Technology scientists ranked by Research.com in 2026. The highlighted bar marks where John Greenman sits on this spectrum.

30 D-Index: 59 scientists 31 D-Index: 114 scientists 32 D-Index: 129 scientists 33 D-Index: 189 scientists 34 D-Index: 200 scientists 35 D-Index: 262 scientists 36 D-Index: 311 scientists 37 D-Index: 312 scientists 38 D-Index: 350 scientists 39 D-Index: 385 scientists 40 D-Index: 348 scientists 41 D-Index: 362 scientists 42 D-Index: 426 scientists 43 D-Index: 380 scientists 44 D-Index: 310 scientists 45 D-Index: 341 scientists 46 D-Index: 301 scientists 47 D-Index: 306 scientists 48 D-Index: 271 scientists 49 D-Index: 246 scientists 50 D-Index: 210 scientists 51 D-Index: 253 scientists 52 D-Index: 213 scientists 53 D-Index: 221 scientists 54 D-Index: 195 scientists 55 D-Index: 186 scientists 56 D-Index: 170 scientists 57 D-Index: 167 scientists 58 D-Index: 166 scientists 59 D-Index: 144 scientists 60 D-Index: 152 scientists 61 D-Index: 141 scientists 62 D-Index: 138 scientists 63 D-Index: 131 scientists 64 D-Index: 118 scientists 65 D-Index: 114 scientists 66 D-Index: 119 scientists 67 D-Index: 95 scientists 68 D-Index: 87 scientists 69 D-Index: 77 scientists 70 D-Index: 89 scientists 71 D-Index: 69 scientists 72 D-Index: 54 scientists 73 D-Index: 46 scientists 74 D-Index: 55 scientists 75 D-Index: 54 scientists 76 D-Index: 49 scientists 77 D-Index: 53 scientists 78 D-Index: 46 scientists 79 D-Index: 28 scientists 80 D-Index: 39 scientists 81 D-Index: 36 scientists 82 D-Index: 24 scientists 83 D-Index: 26 scientists 84 D-Index: 36 scientists 85 D-Index: 18 scientists 86 D-Index: 25 scientists 87 D-Index: 19 scientists 88 D-Index: 26 scientists 89 D-Index: 27 scientists 90 D-Index: 23 scientists 91 D-Index: 15 scientists 92 D-Index: 12 scientists 93 D-Index: 9 scientists 94 D-Index: 15 scientists 95 D-Index: 10 scientists 96 D-Index: 13 scientists 97 D-Index: 13 scientists 98 D-Index: 9 scientists 99 D-Index: 7 scientists 100 D-Index: 7 scientists 101 D-Index: 8 scientists 102 D-Index: 7 scientists 103 D-Index: 7 scientists 104 D-Index: 9 scientists 105 D-Index: 6 scientists 106 D-Index: 9 scientists 107+ D-Index: 99 scientists
30 D-Index 107+

This scientist: 63 D-Index — 83rd percentile

83% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 107 D-Index or more.

Overview

John Greenman is affiliated with the University of the West of England in the United Kingdom. Their research primarily focuses on Environmental Science and Engineering, with a substantial number of publications in Environmental Engineering and Electrical and Electronic Engineering as subfields.

The main topics of John Greenman's work include:

  • Microbial Fuel Cells and Bioremediation
  • Electrochemical sensors and biosensors
  • Supercapacitor Materials and Fabrication
  • Membrane-based Ion Separation Techniques
  • Wastewater Treatment and Nitrogen Removal
  • Membrane Separation Technologies
  • Analytical Chemistry and Sensors

John Greenman has contributed to a variety of recent research papers, highlighting developments in microbial fuel cells and bioelectrochemical systems. Notable publications include:

  • Microbial fuel cells and their electrified biofilms, 2021, Biofilm
  • Microbial Fuel Cell stack performance enhancement through carbon veil anode modification with activated carbon powder, 2020, Applied Energy
  • Urine in Bioelectrochemical Systems: An Overall Review, 2020, ChemElectroChem
  • Long-term bio-power of ceramic microbial fuel cells in individual and stacked configurations, 2020, Bioelectrochemistry
  • From the lab to the field: Self-stratifying microbial fuel cells stacks directly powering lights, 2020, Applied Energy

Frequent co-authors who have collaborated with John Greenman include:

  • Ioannis Ieropoulos
  • Iwona Gajda
  • Jiseon You
  • Xavier Alexis Walter
  • Oluwatosin Obata

The scientist's work is regularly published in several journals, with multiple publications in:

  • Journal of Power Sources
  • Bioelectrochemistry
  • International Journal of Hydrogen Energy
  • Applied Energy
  • iScience

Best Publications

  • Comparative study of three types of microbial fuel cell

    Ioannis A. Ieropoulos;John Greenman;Chris Melhuish;John Hart

  • Microbial fuel cells based on carbon veil electrodes: Stack configuration and scalability

    Ioannis Ieropoulos;John Greenman;Christopher R Melhuish

  • Urine utilisation by Microbial Fuel Cells: Energy fuel for the future

    Ioannis Ieropoulos;John Greenman;Chris Melhuish

  • Effects of flow-rate, inoculum and time on the internal resistance of microbial fuel cells.

    Ioannis Ieropoulos;Jonathan Winfield;John Greenman

  • Electricity from landfill leachate using microbial fuel cells: Comparison with a biological aerated filter

    John Greenman;Antonia Gálvez;Lorenzino Giusti;Ioannis Ieropoulos

  • Waste to real energy: the first MFC powered mobile phone

    Ioannis A. Ieropoulos;Pablo Ledezma;Andrew Stinchcombe;George Papaharalabos

  • Pee power urinal – microbial fuel cell technology field trials in the context of sanitation

    Ioannis Andrea Ieropoulos;Andrew Stinchcombe;Iwona Gajda;Samuel Forbes

  • Self-sustainable electricity production from algae grown in a microbial fuel cell system

    Iwona Gajda;John Greenman;Chris Melhuish;Ioannis Ieropoulos

  • Recent advancements in real-world microbial fuel cell applications

    Iwona Gajda;John Greenman;Ioannis A. Ieropoulos

  • Energetically autonomous robots: Food for thought

    Chris Melhuish;Ioannis Ieropoulos;John Greenman;Ian Horsfield

  • Improved energy output levels from small-scale Microbial Fuel Cells

    I Ieropoulos;J Greenman;Christopher R Melhuish

  • Landfill leachate treatment with microbial fuel cells; scale-up through plurality.

    Antonia Gálvez;John Greenman;Ioannis Ieropoulos

  • A review into the use of ceramics in microbial fuel cells.

    Jonathan Winfield;Iwona Gajda;John Greenman;Ioannis Ieropoulos

  • Electrochemically activated solutions: evidence for antimicrobial efficacy and applications in healthcare environments.

    R. M. S. Thorn;S. W. H. Lee;G. M. Robinson;J. Greenman

  • Self-powered, autonomous Biological Oxygen Demand biosensor for online water quality monitoring.

    Grzegorz Pasternak;John Greenman;Ioannis Ieropoulos

  • Comprehensive Study on Ceramic Membranes for Low‐Cost Microbial Fuel Cells

    Grzegorz Pasternak;Grzegorz Pasternak;John Greenman;Ioannis Ieropoulos

  • The overshoot phenomenon as a function of internal resistance in microbial fuel cells.

    Jonathan Winfield;Ioannis Ieropoulos;John Greenman;Julian Dennis

  • PEE POWER® urinal II - Urinal scale-up with microbial fuel cell scale-down for improved lighting.

    Xavier Alexis Walter;Irene Merino-Jiménez;John Greenman;Ioannis Ieropoulos

  • Simultaneous electricity generation and microbially-assisted electrosynthesis in ceramic MFCs.

    Iwona Gajda;John Greenman;Chris Melhuish;Ioannis Ieropoulos

  • Energy accumulation and improved performance in microbial fuel cells

    Ioannis Ieropoulos;John Greenman;Chris Melhuish;John Hart

  • Microbial fuel cells and their electrified biofilms.

    John Greenman;Iwona Gajda;Jiseon You;Buddhi Arjuna Mendis

Frequent Co-Authors

Ioannis Ieropoulos
Ioannis Ieropoulos University of Southampton
Chris Melhuish
Chris Melhuish University of the West of England
Carlo Santoro
Carlo Santoro University of Milano-Bicocca
Plamen Atanassov
Plamen Atanassov University of California, Irvine
Baikun Li
Baikun Li University of Connecticut
Andrew Adamatzky
Andrew Adamatzky University of the West of England
Alexey Serov
Alexey Serov University of New Mexico
Michael Millar
Michael Millar Barts Health NHS Trust
Crispian Scully
Crispian Scully University College London
Jonathan Rossiter
Jonathan Rossiter University of Bristol

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