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Cristina Freire

Cristina Freire

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 68 6657 6036 54 53 314 14140

Cristina Freire publications per year

The chart shows the history of publications by Cristina Freire between 1990 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Cristina Freire published across 36 years, from 1990 to 2025, averaging 9.9 papers a year. Output peaked at 24 publications in 2013. 24 of the 355 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1990 to 2025. Vertical axis: number of publications, 0 to 24. Peak 24 publications in 2013. 1990: 2 publications 1991: 3 publications 1992: 0 publications 1993: 1 publication 1994: 2 publications 1995: 0 publications 1996: 1 publication 1997: 2 publications 1998: 4 publications 1999: 2 publications 2000: 6 publications 2001: 9 publications 2002: 7 publications 2003: 8 publications 2004: 9 publications 2005: 12 publications 2006: 7 publications 2007: 8 publications 2008: 11 publications 2009: 11 publications 2010: 20 publications 2011: 8 publications 2012: 11 publications 2013: 24 publications 2014: 21 publications 2015: 19 publications 2016: 16 publications 2017: 18 publications 2018: 14 publications 2019: 20 publications 2020: 21 publications 2021: 14 publications 2022: 10 publications 2023: 10 publications 2024: 9 publications 2025: 15 publications
1990 2025

355 publications in total across all disciplines

View publications per year as a table
Cristina Freire: publications per year, 1990 to 2025
Year Publications
1990 2
1991 3
1992 0
1993 1
1994 2
1995 0
1996 1
1997 2
1998 4
1999 2
2000 6
2001 9
2002 7
2003 8
2004 9
2005 12
2006 7
2007 8
2008 11
2009 11
2010 20
2011 8
2012 11
2013 24
2014 21
2015 19
2016 16
2017 18
2018 14
2019 20
2020 21
2021 14
2022 10
2023 10
2024 9
2025 15
Total 355
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Cristina Freire 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 Cristina Freire 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, 301–320 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: 314 publications — 66th percentile

66% 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
301–320 764 314
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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Cristina Freire 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 Cristina Freire 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, 68–69 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: 68 D-Index — 64th percentile

64% 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 68
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
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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Research.com Recognitions

  • 2020 - Member of the European Academy of Sciences

Overview

Cristina Freire is affiliated with the University of Porto in Portugal. Their research primarily spans the fields of Engineering and Materials Science, with a strong focus on Renewable Energy, Sustainability and the Environment; Materials Chemistry; and Electrical and Electronic Engineering. Additional subfields of interest include Organic Chemistry and Molecular Biology.

The main topics of their work cover a range of areas in materials and energy sciences, including:

  • Electrocatalysts for Energy Conversion
  • Advanced Photocatalysis Techniques
  • Fuel Cells and Related Materials
  • Nanomaterials for Catalytic Reactions
  • Advanced Battery Technologies Research
  • Polyoxometalates: Synthesis and Applications
  • Phytochemicals and Antioxidant Activities

Their recent scholarly contributions include the following papers:

  • Optimizing the extraction of phenolic antioxidants from chestnut shells by subcritical water extraction using response surface methodology, 2020, Food Chemistry
  • Advanced framework-modified POM@ZIF-67 nanocomposites as enhanced oxygen evolution reaction electrocatalysts, 2020, Journal of Materials Chemistry A
  • Oxygen Evolution Reaction Electrocatalytic Improvement in POM@ZIF Nanocomposites: A Bidirectional Synergistic Effect, 2020, ACS Applied Energy Materials
  • Green-Sustainable Recovery of Phenolic and Antioxidant Compounds from Industrial Chestnut Shells Using Ultrasound-Assisted Extraction: Optimization and Evaluation of Biological Activities In Vitro, 2020, Antioxidants
  • Emerging electrochemical biosensing approaches for detection of Listeria monocytogenes in food samples: An overview, 2020, Trends in Food Science & Technology

Frequently publishing venues include:

  • Molecules
  • Materials
  • Catalysts
  • Catalysis Today
  • Dalton Transactions

Frequent collaborators in their research work are Diana M. Fernandes, Andreia F. Peixoto, Iwona Kuźniarska-Biernacka, Cristina Delerue-Matos, and Clara Pereira.

Cristina Freire was recognized as a Member of the European Academy of Sciences in 2020.

Best Publications

  • Superparamagnetic MFe2O4 (M = Fe, Co, Mn) Nanoparticles: Tuning the Particle Size and Magnetic Properties through a Novel One-Step Coprecipitation Route

    Clara Pereira;André M. Pereira;Carlos Fernandes;Mariana Rocha

  • Antioxidant activity of Agaricus sp. mushrooms by chemical, biochemical and electrochemical assays

    Lillian Barros;Soraia Falcão;Soraia Falcão;Paula Baptista;Cristina Freire

  • Progress in the Raman spectra analysis of covalently functionalized multiwalled carbon nanotubes: unraveling disorder in graphitic materials

    Susana L. H. Rebelo;Alexandra Guedes;Monika E. Szefczyk;André M. Pereira

  • Phenolic Profiling of Portuguese Propolis by LC–MS Spectrometry: Uncommon Propolis Rich in Flavonoid Glycosides

    Soraia I. Falcão;Soraia I. Falcão;Nuno Vale;Paula Gomes;Maria R. M. Domingues

  • Assessment of 83 pharmaceuticals in WWTP influent and effluent samples by UHPLC-MS/MS: Hourly variation.

    Paula Paíga;Manuela Correia;Maria João Fernandes;Ana Silva

  • Electrochemical biosensors for Salmonella: State of the art and challenges in food safety assessment.

    Nádia F.D. Silva;Júlia M.C.S. Magalhães;Cristina Freire;Cristina Delerue-Matos

  • Designing novel hybrid materials by one-pot co-condensation: from hydrophobic mesoporous silica nanoparticles to superamphiphobic cotton textiles

    C. Pereira;C. Alves;A. Monteiro;C. Magén

  • New Insights into the Structure and Properties of Electroactive Polymer Films Derived from (Ni(salen))

    Miguel Vilas-Boas;Cristina Freire;Baltazar de Castro;Paul A. Christensen

  • Optimizing the extraction of phenolic antioxidants from chestnut shells by subcritical water extraction using response surface methodology.

    Diana Pinto;Elsa F. Vieira;Andreia F. Peixoto;Cristina Freire

  • POM & MOF-based Electrocatalysts for Energy-related Reactions

    Cristina Freire;Diana M. Fernandes;Marta Nunes;Victor K. Abdelkader

  • Superparamagnetic γ-Fe2O3@SiO2 nanoparticles: a novel support for the immobilization of [VO(acac)2]

    Clara Pereira;André M. Pereira;Pedro Quaresma;Pedro Quaresma;Pedro B. Tavares

  • Electrochemical Characterization of a Novel Salen-Type Modified Electrode

    M. Vilas-Boas;C. Freire;B. de Castro;A. R. Hillman

  • Tuning the surface chemistry of graphene flakes: new strategies for selective oxidation

    Mariana P. Araújo;O. S. G. P. Soares;A. J. S. Fernandes;M. F. R. Pereira

  • Spectroscopic characterisation of electrogenerated nickel(III) species. Complexes with N2O2 Schiff-base ligands derived from salicylaldehyde

    Cristina Freire;Baltazar de Castro

  • Electrochemical and X-ray studies of nickel(II) Schiff base complexes derived from salicylaldehyde

    I.C Santos;M Vilas-Boas;M.F.M Piedade;C Freire

  • Catalytic performance and electrochemical behaviour of Metal–organic frameworks: MIL-101(Fe) versus NH2-MIL-101(Fe)

    André D.S. Barbosa;Diana Julião;Diana M. Fernandes;Andreia F. Peixoto

  • Novel electrochemical sensor based on N-doped carbon nanotubes and Fe3O4 nanoparticles: Simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid

    Diana M. Fernandes;Marta Costa;Clara Pereira;Belén Bachiller-Baeza

  • Physicochemical characterization of organosilylated halloysite clay nanotubes

    Andreia F. Peixoto;Ana C. Fernandes;Clara Pereira;João Pires

  • New insights into the functionalization of multi-walled carbon nanotubes with aniline derivatives

    M.E. Lipińska;S.L.H. Rebelo;M.F.R. Pereira;J.A.N.F. Gomes

  • High performance microspherical activated carbons for methane storage and landfill gas or biogas upgrade

    Ana S. Mestre;Ana S. Mestre;Cristina Freire;João Pires;Ana P. Carvalho

  • EPR and electrochemical study of nickel(III) complexes of bis(3,5-dichlorosalicylaldehyde) o-phenylenediimine. Evidence for adduct formation with pyridines

    Baltazar De Castro;Cristina Freire

Frequent Co-Authors

Baltazar de Castro
Baltazar de Castro University of Porto
Ana P. Carvalho
Ana P. Carvalho University of Lisbon
João Pires
João Pires University of Lisbon
Manuel Fernando R. Pereira
Manuel Fernando R. Pereira University of Porto
José L. Figueiredo
José L. Figueiredo University of Porto
Cristina Delerue-Matos
Cristina Delerue-Matos Instituto Superior de Engenharia do Porto
João P. Araújo
João P. Araújo University of Porto
A. Robert Hillman
A. Robert Hillman University of Leicester
Luís Cunha-Silva
Luís Cunha-Silva University of Porto
Inmaculada Rodríguez-Ramos
Inmaculada Rodríguez-Ramos Spanish National Research Council

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