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 111 762 673 39 36 727 50741

James H. Clark publications per year

The chart shows the history of publications by James H. Clark between 1961 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. James H. Clark published across 66 years, from 1961 to 2026, averaging 12.6 papers a year. Output peaked at 44 publications in 2020. 15 of the 832 publications appeared in the last two years.

No. of publications
10 20 30 40
Bar chart. Horizontal axis: year, 1961 to 2026. Vertical axis: number of publications, 0 to 44. Peak 44 publications in 2020. 1961: 1 publication 1962: 0 publications 1963: 0 publications 1964: 0 publications 1965: 0 publications 1966: 0 publications 1967: 0 publications 1968: 0 publications 1969: 0 publications 1970: 0 publications 1971: 0 publications 1972: 0 publications 1973: 0 publications 1974: 2 publications 1975: 1 publication 1976: 5 publications 1977: 9 publications 1978: 6 publications 1979: 6 publications 1980: 3 publications 1981: 4 publications 1982: 6 publications 1983: 7 publications 1984: 3 publications 1985: 6 publications 1986: 13 publications 1987: 11 publications 1988: 3 publications 1989: 8 publications 1990: 5 publications 1991: 5 publications 1992: 5 publications 1993: 9 publications 1994: 14 publications 1995: 8 publications 1996: 13 publications 1997: 19 publications 1998: 24 publications 1999: 20 publications 2000: 28 publications 2001: 13 publications 2002: 13 publications 2003: 8 publications 2004: 14 publications 2005: 13 publications 2006: 21 publications 2007: 20 publications 2008: 18 publications 2009: 21 publications 2010: 17 publications 2011: 19 publications 2012: 25 publications 2013: 31 publications 2014: 28 publications 2015: 30 publications 2016: 35 publications 2017: 28 publications 2018: 30 publications 2019: 39 publications 2020: 44 publications 2021: 25 publications 2022: 32 publications 2023: 22 publications 2024: 27 publications 2025: 14 publications 2026: 1 publication
1961 2026

832 publications in total across all disciplines

View publications per year as a table
James H. Clark: publications per year, 1961 to 2026
Year Publications
1961 1
1962 0
1963 0
1964 0
1965 0
1966 0
1967 0
1968 0
1969 0
1970 0
1971 0
1972 0
1973 0
1974 2
1975 1
1976 5
1977 9
1978 6
1979 6
1980 3
1981 4
1982 6
1983 7
1984 3
1985 6
1986 13
1987 11
1988 3
1989 8
1990 5
1991 5
1992 5
1993 9
1994 14
1995 8
1996 13
1997 19
1998 24
1999 20
2000 28
2001 13
2002 13
2003 8
2004 14
2005 13
2006 21
2007 20
2008 18
2009 21
2010 17
2011 19
2012 25
2013 31
2014 28
2015 30
2016 35
2017 28
2018 30
2019 39
2020 44
2021 25
2022 32
2023 22
2024 27
2025 14
2026 1
Total 832
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James H. Clark 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 James H. Clark 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, 721–740 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: 727 publications — 96th percentile

96% 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
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 54 727
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
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James H. Clark 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 James H. Clark 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, 110–111 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: 111 D-Index — 96th percentile

96% 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
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 69 111
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
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Overview

James H. Clark is affiliated with the University of York in the United Kingdom. They are an active researcher in engineering, with a focus on biomedical engineering, organic chemistry, materials chemistry, mechanical engineering, and environmental chemistry as subfields of study.

Their research covers several main topics, including:

  • Catalysis for Biomass Conversion
  • Lignin and Wood Chemistry
  • Chemistry and Chemical Engineering
  • Catalysis and Hydrodesulfurization Studies
  • Biofuel production and bioconversion
  • Thermochemical Biomass Conversion Processes
  • Nanomaterials for catalytic reactions

James H. Clark has contributed numerous papers to several frequent publication venues. These include:

  • Green Chemistry (25 publications)
  • ACS Sustainable Chemistry & Engineering (9 publications)
  • Journal of Cleaner Production (6 publications)
  • ChemSusChem (5 publications)
  • Journal of Hazardous Materials (5 publications)

Their recent papers reflect diverse topics within sustainable chemistry and catalysis:

  • "Biorenewable hydrogen production through biomass gasification: A review and future prospects," 2020, Environmental Research
  • "Recent Advances in the Catalytic Depolymerization of Lignin towards Phenolic Chemicals: A Review," 2020, ChemSusChem
  • "Rethinking chemistry for a circular economy," 2020, Science
  • "Rapid and efficient adsorption of methylene blue dye from aqueous solution by hierarchically porous, activated starbons®: Mechanism and porosity dependence," 2022, Journal of Hazardous Materials
  • "Green chemicals from used cooking oils: Trends, challenges, and opportunities," 2020, Current Opinion in Green and Sustainable Chemistry

James H. Clark has worked with multiple frequent co-authors, including:

  • Jiajun Fan (45 collaborations)
  • Shicheng Zhang (30 collaborations)
  • Gang Luo (19 collaborations)
  • Vitaliy L. Budarin (18 collaborations)
  • Daniel C.W. Tsang (17 collaborations)

Best Publications

  • Supported metal nanoparticles on porous materials. Methods and applications.

    Robin J. White;Rafael Luque;Vitaliy L. Budarin;James H. Clark

  • Tools and techniques for solvent selection: green solvent selection guides

    Fergal P. Byrne;Saimeng Jin;Giulia Paggiola;Tabitha H. M. Petchey

  • Sustainable carbon materials

    Maria-Magdalena Titirici;Robin J. White;Nicolas Brun;Vitaliy L. Budarin

  • Food waste as a valuable resource for the production of chemicals, materials and fuels. Current situation and global perspective

    Carol Sze Ki Lin;Lucie A. Pfaltzgraff;Lorenzo Herrero-Davila;Egid B. Mubofu

  • Green chemistry: challenges and opportunities

    James H. Clark

  • Solid Acids for Green Chemistry

    James H. Clark

  • Biofuels: a technological perspective

    Rafael Luque;Rafael Luque;Lorenzo Herrero-Davila;Juan M. Campelo;James H. Clark

  • Fluoride ion as a base in organic synthesis

    James H. Clark

  • Recent developments on the epoxidation of alkenes using hydrogen peroxide as an oxidant

    G. Grigoropoulou;J. H. Clark;J. A. Elings

  • Food waste biomass: a resource for high-value chemicals

    Lucie A. Pfaltzgraff;Mario De bruyn;Emma C. Cooper;Vitaly Budarin

  • Tuneable porous carbonaceous materials from renewable resources

    Robin J. White;Vitaly Budarin;Rafael Luque;Rafael Luque;James H. Clark

  • Towards a holistic approach to metrics for the 21st century pharmaceutical industry

    C. Robert McElroy;Andri Constantinou;Leonie C. Jones;Louise Summerton

  • Introduction to chemicals from biomass

    James H. Clark;Fabien E. I. Deswarte

  • Dihydrolevoglucosenone (Cyrene) as a bio-based alternative for dipolar aprotic solvents.

    James Sherwood;Mario De bruyn;Andri Constantinou;Laurianne Moity

  • The production of furfural directly from hemicellulose in lignocellulosic biomass : A review

    Yiping Luo;Yiping Luo;Zheng Li;Xiaoling Li;Xiaofeng Liu

  • Catalysis of liquid phase organic reactions using chemically modified mesoporous inorganic solids

    James H. Clark;Duncan J. Macquarrie

  • Generation, capture, and utilization of industrial carbon dioxide

    Andrew J. Hunt;Emily H. K. Sin;Ray Marriott;James H. Clark

  • Green chemistry and the biorefinery: a partnership for a sustainable future

    James H. Clark;Vitaly Budarin;Fabien E. I. Deswarte;Jeffrey J. E. Hardy

  • Green synthesis of gamma-valerolactone (GVL) through hydrogenation of biomass-derived levulinic acid using non-noble metal catalysts : A critical review

    Shanta Dutta;Iris K.M. Yu;Iris K.M. Yu;Daniel C.W. Tsang;Yun Hau Ng

  • Solid acids and their use as environmentally friendly catalysts in organic synthesis

    Karen Wilson;James H. Clark

Frequent Co-Authors

Duncan J. Macquarrie
Duncan J. Macquarrie University of York
Andrew J. Hunt
Andrew J. Hunt Khon Kaen University
Rafael Luque
Rafael Luque King Saud University
Karen Wilson
Karen Wilson Griffith University
Dave J. Adams
Dave J. Adams University of Glasgow
Changwei Hu
Changwei Hu Sichuan University
Babak Karimi
Babak Karimi Institute for Advanced Studies in Basic Sciences
Shicheng Zhang
Shicheng Zhang Fudan University
Daniel C.W. Tsang
Daniel C.W. Tsang Hong Kong University of Science and Technology
Keith Scott
Keith Scott Newcastle University

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