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José J.M. Órfão

José J.M. Órfão

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 73 4906 4456 38 38 187 21228

José J.M. Órfão publications per year

The chart shows the history of publications by José J.M. Órfão between 1983 and 2021, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. José J.M. Órfão published across 39 years, from 1983 to 2021, averaging 4.7 papers a year. Output peaked at 21 publications in 2012. 4 of the 183 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1983 to 2021. Vertical axis: number of publications, 0 to 21. Peak 21 publications in 2012. 1983: 1 publication 1984: 2 publications 1985: 0 publications 1986: 1 publication 1987: 0 publications 1988: 0 publications 1989: 1 publication 1990: 0 publications 1991: 0 publications 1992: 0 publications 1993: 1 publication 1994: 1 publication 1995: 0 publications 1996: 0 publications 1997: 0 publications 1998: 1 publication 1999: 3 publications 2000: 2 publications 2001: 3 publications 2002: 2 publications 2003: 4 publications 2004: 8 publications 2005: 3 publications 2006: 5 publications 2007: 4 publications 2008: 10 publications 2009: 15 publications 2010: 14 publications 2011: 9 publications 2012: 21 publications 2013: 11 publications 2014: 8 publications 2015: 16 publications 2016: 9 publications 2017: 11 publications 2018: 7 publications 2019: 6 publications 2020: 0 publications 2021: 4 publications
1983 2021

183 publications in total across all disciplines

View publications per year as a table
José J.M. Órfão: publications per year, 1983 to 2021
Year Publications
1983 1
1984 2
1985 0
1986 1
1987 0
1988 0
1989 1
1990 0
1991 0
1992 0
1993 1
1994 1
1995 0
1996 0
1997 0
1998 1
1999 3
2000 2
2001 3
2002 2
2003 4
2004 8
2005 3
2006 5
2007 4
2008 10
2009 15
2010 14
2011 9
2012 21
2013 11
2014 8
2015 16
2016 9
2017 11
2018 7
2019 6
2020 0
2021 4
Total 183
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José J.M. Órfão 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 José J.M. Órfão 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, 181–200 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: 187 publications — 28th percentile

28% 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 1,344 187
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
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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José J.M. Órfão 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 José J.M. Órfão 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, 72–73 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: 73 D-Index — 73rd percentile

73% 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 73
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
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Overview

What is he best known for?

The fields of study he is best known for:

  • Catalysis
  • Organic chemistry
  • Oxygen

José J.M. Órfão spends much of his time researching Catalysis, Inorganic chemistry, Activated carbon, Adsorption and Carbon. The concepts of his Catalysis study are interwoven with issues in Carbon nanotube, Oxygen and Mineralization. His biological study spans a wide range of topics, including Aniline, Reactive dye and Catalytic oxidation.

His Activated carbon study introduces a deeper knowledge of Organic chemistry. His work investigates the relationship between Adsorption and topics such as Thermal treatment that intersect with problems in Dye molecule and Cationic polymerization. José J.M. Órfão brings together Carbon and Spectral line to produce work in his papers.

His most cited work include:

  • Modification of the surface chemistry of activated carbons (2186 citations)
  • Pyrolysis kinetics of lignocellulosic materials—three independent reactions model (608 citations)
  • Adsorption of anionic and cationic dyes on activated carbons with different surface chemistries. (544 citations)

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

His primary areas of study are Catalysis, Inorganic chemistry, Activated carbon, Carbon and Adsorption. José J.M. Órfão has included themes like Oxalic acid, Carbon nanotube and Mineralization in his Catalysis study. His Inorganic chemistry research incorporates themes from Bimetallic strip, Oxide, Catalytic oxidation and Nitrogen.

His Activated carbon course of study focuses on Ozone and Sulfur. When carried out as part of a general Carbon research project, his work on Carbon nanofiber is frequently linked to work in Filamentous carbon, therefore connecting diverse disciplines of study. His work deals with themes such as Peroxide, Hydrogen peroxide and Nuclear chemistry, which intersect with Adsorption.

He most often published in these fields:

  • Catalysis (83.15%)
  • Inorganic chemistry (64.61%)
  • Activated carbon (34.83%)

What were the highlights of his more recent work (between 2016-2021)?

  • Catalysis (83.15%)
  • Cellulose (8.43%)
  • Adsorption (25.84%)

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

His scientific interests lie mostly in Catalysis, Cellulose, Adsorption, Carbon and Carbon nanotube. Organic chemistry covers José J.M. Órfão research in Catalysis. His research in Adsorption intersects with topics in Inorganic chemistry, Ethyl acetate and Nuclear chemistry.

His primary area of study in Inorganic chemistry is in the field of Cerium. He has included themes like Coke, Oxidative phosphorylation, Raman spectroscopy and Glycerol in his Carbon study. His work in Bromate covers topics such as Titanium dioxide which are related to areas like Activated carbon.

Between 2016 and 2021, his most popular works were:

  • Carbon supported Ru-Ni bimetallic catalysts for the enhanced one-pot conversion of cellulose to sorbitol (49 citations)
  • Effect of cobalt loading on the solid state properties and ethyl acetate oxidation performance of cobalt-cerium mixed oxides. (38 citations)
  • Catalytic reduction of bromate over monometallic catalysts on different powder and structured supports (28 citations)

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

  • Catalysis
  • Organic chemistry
  • Oxygen

José J.M. Órfão mainly focuses on Catalysis, Adsorption, Inorganic chemistry, Cellulose and Sorbitol. His Catalysis research integrates issues from Activated carbon, Ethyl acetate, Carbon nanotube and Nuclear chemistry. His Activated carbon research is multidisciplinary, relying on both Heterogeneous catalysis, Bimetallic strip, Carbon and Nickel.

The various areas that José J.M. Órfão examines in his Adsorption study include Oxide, Cobalt, Oxygen, Atomic ratio and Catalytic oxidation. His study of Cerium is a part of Inorganic chemistry. His Sorbitol research is multidisciplinary, incorporating perspectives in Polymer chemistry, Thermogravimetry, Crystallinity, Tissue paper and Cellulosic ethanol.

Best Publications

  • Modification of the surface chemistry of activated carbons

    J.L Figueiredo;M.F.R Pereira;M.M.A Freitas;J.J.M Órfão

  • Pyrolysis kinetics of lignocellulosic materials—three independent reactions model

    J.J.M. Orfão;F.J.A. Antunes;J.L. Figueiredo

  • Adsorption of anionic and cationic dyes on activated carbons with different surface chemistries.

    P.C.C Faria;J.J.M Órfão;M.F.R Pereira

  • Adsorption of dyes on activated carbons: influence of surface chemical groups

    Manuel Fernando R Pereira;Samanta F Soares;José J.M Órfão;José L Figueiredo

  • The role of lattice oxygen on the activity of manganese oxides towards the oxidation of volatile organic compounds

    V.P. Santos;M.F.R. Pereira;J.J.M. Órfão;J.L. Figueiredo

  • Adsorption of a reactive dye on chemically modified activated carbons—Influence of pH

    J.J.M. Órfão;A.I.M. Silva;J.C.V. Pereira;S.A. Barata

  • Adsorption of simple aromatic compounds on activated carbons.

    Francisco Villacañas;Manuel Fernando R. Pereira;José J.M. Órfão;José L. Figueiredo

  • Characterization of Active Sites on Carbon Catalysts

    José L. Figueiredo;Manuel F. R. Pereira;Maria M. A. Freitas;José J. M. Orfao

  • Activated carbon catalytic ozonation of oxamic and oxalic acids

    P.C.C. Faria;J.J.M. Órfão;M.F.R. Pereira

  • Oxidative dehydrogenation of ethylbenzene on activated carbon catalysts. I. Influence of surface chemical groups

    M.F.R. Pereira;J.J.M. Órfão;J.L. Figueiredo

  • Oxidation of CO, ethanol and toluene over TiO2 supported noble metal catalysts

    Vera P. Santos;Sónia A.C. Carabineiro;Pedro B. Tavares;Manuel F.R. Pereira

  • MWCNT activation and its influence on the catalytic performance of Pt/MWCNT catalysts for selective hydrogenation

    A. Solhy;B.F. Machado;J. Beausoleil;Y. Kihn

  • Structural and chemical disorder of cryptomelane promoted by alkali doping: Influence on catalytic properties

    V.P. Santos;O.S.G.P. Soares;J.J.W. Bakker;M.F.R. Pereira

  • Decolourisation of dye solutions by oxidation with H2O2 in the presence of modified activated carbons

    V.P. Santos;M.F.R. Pereira;P.C.C. Faria;J.J.M. Órfão

  • Influence of the surface chemistry of multi-walled carbon nanotubes on their activity as ozonation catalysts

    Alexandra G. Gonçalves;José L. Figueiredo;José J.M. Órfão;Manuel F.R. Pereira

  • Activated carbon and ceria catalysts applied to the catalytic ozonation of dyes and textile effluents

    P.C.C. Faria;J.J.M. Órfão;M.F.R. Pereira

  • Catalytic ozonation of sulphamethoxazole in the presence of carbon materials: catalytic performance and reaction pathways.

    Alexandra G. Gonçalves;José J.M. Órfão;Manuel Fernando R. Pereira

  • Mineralisation of coloured aqueous solutions by ozonation in the presence of activated carbon

    Patrícia C.C. Faria;José J.M. Órfão;Manuel Fernando R. Pereira

  • Catalytic activity of carbon nanotubes in the oxidative dehydrogenation of ethylbenzene

    Manuel Fernando R. Pereira;José L. Figueiredo;José J.M. Órfão;Philippe Serp

  • Ozonation of textile effluents and dye solutions under continuous operation: Influence of operating parameters.

    Olívia Salomé G.P. Soares;José J.M. Órfão;Dionísia Portela;António Vieira

Frequent Co-Authors

Manuel Fernando R. Pereira
Manuel Fernando R. Pereira University of Porto
José L. Figueiredo
José L. Figueiredo University of Porto
Sónia A. C. Carabineiro
Sónia A. C. Carabineiro Universidade Nova de Lisboa
Juan José Delgado
Juan José Delgado University of Cádiz
Xiaowei Chen
Xiaowei Chen University of Cádiz
Joaquim L. Faria
Joaquim L. Faria University of Porto
Josep Font
Josep Font University of Barcelona
Michalis Konsolakis
Michalis Konsolakis Technical University of Crete
Antonio Sepúlveda-Escribano
Antonio Sepúlveda-Escribano University of Alicante
Inmaculada Rodríguez-Ramos
Inmaculada Rodríguez-Ramos Spanish National Research Council

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