World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
74
Citations
17542
World Ranking
4773
National Ranking
1500

Philip L. Walker 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 Philip L. Walker 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: 350 publications — 73rd percentile

73% of scientists in this discipline score the same or lower.

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

Philip L. Walker 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 Philip L. Walker 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: 74 D-Index — 75th percentile

75% of scientists in this discipline score the same or lower.

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

Overview

What is he best known for?

The fields of study he is best known for:

  • Organic chemistry
  • Oxygen
  • Catalysis

Philip L. Walker focuses on Carbon, Coal, Inorganic chemistry, Analytical chemistry and Char. His work deals with themes such as Graphite, Carbon monoxide, Oxygen and Chemisorption, which intersect with Carbon. His Coal research integrates issues from Porosity, Microporous material, Mineralogy and Infrared spectroscopy.

His Inorganic chemistry research is multidisciplinary, relying on both Hydrolysis, Catalysis and Adsorption. His Analytical chemistry research incorporates themes from Chemical kinetics and Decomposition. Philip L. Walker interconnects Reactivity and Magnesium in the investigation of issues within Char.

His most cited work include:

  • Nature of the porosity in American coals (539 citations)
  • THE IMPORTANCE OF ACTIVE SURFACE AREA IN THE CARBON-OXYGEN REACTION1,2 (522 citations)
  • Gas Reactions of Carbon (473 citations)

What are the main themes of his work throughout his whole career to date?

His main research concerns Carbon, Inorganic chemistry, Coal, Analytical chemistry and Adsorption. His studies deal with areas such as Graphite, Molecular sieve, Carbon dioxide and Oxygen as well as Carbon. His study looks at the relationship between Inorganic chemistry and topics such as Catalysis, which overlap with Dispersion.

His research in Coal tackles topics such as Mineralogy which are related to areas like Porosity. The study incorporates disciplines such as Microporous material, Torr and Nitrogen in addition to Adsorption. His Char study combines topics in areas such as Reactivity, Charring and Coal gasification.

He most often published in these fields:

  • Carbon (41.64%)
  • Inorganic chemistry (33.75%)
  • Coal (20.50%)

What were the highlights of his more recent work (between 1981-2016)?

  • Carbon (41.64%)
  • Inorganic chemistry (33.75%)
  • Catalysis (14.20%)

In recent papers he was focusing on the following fields of study:

His primary areas of study are Carbon, Inorganic chemistry, Catalysis, Coal and Char. His Carbon research includes themes of Molecular sieve, Adsorption, Graphite, Mineralogy and Oxygen. His Mineralogy study combines topics from a wide range of disciplines, such as Differential scanning calorimetry, Carbon dioxide and Analytical chemistry.

His Inorganic chemistry study integrates concerns from other disciplines, such as Ion exchange, Reactivity, Pyrolysis and Chemisorption. His Catalysis study combines topics from a wide range of disciplines, such as Dispersion, Hydrogen and Nickel. The various areas that Philip L. Walker examines in his Coal study include Environmental chemistry, Carbonization and Swelling.

Between 1981 and 2016, his most popular works were:

  • Importance of carbon active sites in the gasification of coal chars (389 citations)
  • Importance of catalyst dispersion in the gasification of lignite chars (167 citations)
  • An update on the carbon-oxygen reaction (141 citations)

In his most recent research, the most cited papers focused on:

  • Organic chemistry
  • Oxygen
  • Catalysis

Carbon, Inorganic chemistry, Catalysis, Coal and Pyrolysis are his primary areas of study. He has researched Carbon in several fields, including Chemisorption, Molecular sieve, Adsorption, Reaction rate constant and Oxygen. His Inorganic chemistry research is multidisciplinary, incorporating perspectives in Fourier transform infrared spectroscopy and Pellet.

His research in Catalysis intersects with topics in Dispersion and Hydrogen. His biological study spans a wide range of topics, including Carbonization, Intensity, Mineralogy and Analytical chemistry. His work on Char as part of general Pyrolysis study is frequently connected to Carbon black, therefore bridging the gap between diverse disciplines of science and establishing a new relationship between them.

Best Publications

  • Nature of the porosity in American coals

    H. Gan;S.P. Nandi;P.L. Walker

  • THE IMPORTANCE OF ACTIVE SURFACE AREA IN THE CARBON-OXYGEN REACTION1,2

    N. R. Laine;F. J. Vastola;P. L. Walker

  • Gas Reactions of Carbon

    P.L. Walker;Frank Rusinko;L.G. Austin

  • Importance of carbon active sites in the gasification of coal chars

    Ljubiša R. Radović;Philip L. Walker;Robert G. Jenkins

  • Laser raman studies on carbons

    M. Nakamizo;R. Kammereck;P.L. Walker

  • Reactivity of heat-treated coals in air at 500 °C

    Robert G. Jenkins;Satyendra P. Nandi;Philip L. Walker

  • Measurement of interlayer spacings and crystal sizes in turbostratic carbons

    M.A Short;P.L Walker

  • Importance of catalyst dispersion in the gasification of lignite chars

    Ljubisa R. Radovic;Philip L. Walker;Robert G. Jenkins

  • Reactivity of heat-treated coals in carbon dioxide at 900 °C

    Edwin Hippo;Philip L. Walker

  • An update on the carbon-oxygen reaction

    P.L. Walker;R.L. Taylor;J.M. Ranish

  • CO hydrogenation over well-dispersed carbon-supported iron catalysts

    H-J. Jung;P.L. Walker;Albert Vannice

  • Carbon Formation from Carbon Monoxide-Hydrogen Mixtures over Iron Catalysts.I. Properties of Carbon Formed

    P. L. Walker;J. F. Rakszawski;G. R. Imperial

  • Catalysis of gasification of coal-derived cokes and chars

    Philip L. Walker;Shiro Matsumoto;Tamotsu Hanzawa;Takatoshi Muira

  • Fourier Transform Infrared study of mineral matter in coal. A novel method for quantitative mineralogical analysis

    Paul C. Painter;Michael M. Coleman;Robert G. Jenkins;Pyung W. Whang

  • Carbon as a support for catalysts: I. Effect of surface heterogeneity of carbon on dispersion of platinum

    P. Ehrburger;O.P. Mahajan;P.L. Walker

  • Carbon: An old but new material revisited

    P.L. Walker

  • 6Å molecular sieve properties of saran-type carbons

    T.G. Lamond;J.E. Metcalfe;P.L. Walker

  • Enhancement of lignite char reactivity to steam by cation addition

    Edwin J. Hippo;Robert G. Jenkins;Philip L. Walker

  • Activated diffusion of methane in coal

    S.P. Nandi;P.L. Walker

  • Thermal desorption analysis of oxygen surface complexes on carbon

    G Tremblay;F.J Vastola;P.L Walker

  • Chemistry and Physics of Carbon A Series of Advances

    P. L. Walker;P. A. Thrower;Ljubisa R. Radovic

Frequent Co-Authors

Ljubisa R. Radovic
Ljubisa R. Radovic Pennsylvania State University
Angel Linares-Solano
Angel Linares-Solano University of Alicante
Paul C. Painter
Paul C. Painter Pennsylvania State University
Michael M. Coleman
Michael M. Coleman Pennsylvania State University
Francisco Rodríguez-Reinoso
Francisco Rodríguez-Reinoso University of Alicante
José Rivera-Utrilla
José Rivera-Utrilla University of Granada
Carlos Moreno-Castilla
Carlos Moreno-Castilla University of Granada
John Meurig Thomas
John Meurig Thomas University of Cambridge

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Best Scientists Citing Philip L. Walker