Citation Rankings
Highly Cited Researchers
Highly Cited Researchers 21 Scientists Citation Rankings - 2025
The Citation Rankings (Highly Cited Researchers) list highlight the most cited and influential researchers across a vast range of scientific fields, covering 197 main and sub-disciplines, including the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings. This service, offered exclusively by AD Scientific Index, aims to provide a balanced perspective by excluding data from CERN and other statistical sources that disproportionately favor certain researchers, particularly in the social sciences and humanities. This unique approach addresses the advantages researchers with multi-author publications and CERN involvement hold over others. Furthermore, citation rankings help uncover rule violations and unethical practices within the research community. For more detailed citation analyses, explore the Scientists Last 6 Years Citation Index, Universities Total Citations Rankings 2025, and Universities Last 6 Years Citations Rankings 2025.
* Total Citation Counts Rankings
Ranking Based On Selection: 1
catalysis
theoretical chemistry
DFT
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,771
863
0.311
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* Total Citation Counts Rankings
Ranking Based On Selection: 2
Chemistry
reactivity
catalysis
crystallography
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,384
407
0.171
* Total Citation Counts Rankings
Ranking Based On Selection: 3
Catalyst preparation and scale-up
catalyst deactivation
Fischer-Tropsch Catalysis
Regeneration
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,284
954
0.418
* Total Citation Counts Rankings
Ranking Based On Selection: 4
catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,551
490
0.316
* Total Citation Counts Rankings
Ranking Based On Selection: 5
Environmental science
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,400
361
0.258
* Total Citation Counts Rankings
Ranking Based On Selection: 6
Catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,395
370
0.265
* Total Citation Counts Rankings
Ranking Based On Selection: 7
data science
computational chemistry
catalysis
data engineering
discrete optimisation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,015
333
0.328
* Total Citation Counts Rankings
Ranking Based On Selection: 8
Catalysis
Organic Chemistry
Phosphororus chemistry
ligand design & development
Inorganic Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
768
277
0.361
* Total Citation Counts Rankings
Ranking Based On Selection: 9
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
747
442
0.592
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* Total Citation Counts Rankings
Ranking Based On Selection: 10
Design of experiments
Optimization
Data science
Statistical learning
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
599
266
0.444
* Total Citation Counts Rankings
Ranking Based On Selection: 11
Automotive fuels
engines
combustion
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
450
180
0.400
* Total Citation Counts Rankings
Ranking Based On Selection: 12
Piezoelectric thin films
CFD
Engineering Simulation
Energy Harvesting
Meta Models
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
414
88
0.213
* Total Citation Counts Rankings
Ranking Based On Selection: 13
chemical engineering
Fischer Tropsch
Chemicals
Modelling
Business
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
344
13
0.038
* Total Citation Counts Rankings
Ranking Based On Selection: 14
Nanotechnology
carbon nanotubes
membrane separation
water purification
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
199
84
0.422
* Total Citation Counts Rankings
Ranking Based On Selection: 15
Materials Science
Catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
143
104
0.727
* Total Citation Counts Rankings
Ranking Based On Selection: 16
water
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
136
29
0.213
* Total Citation Counts Rankings
Ranking Based On Selection: 17
Materials Science
Catalysis
Innovation Management
Innovation Systems Development
Strategy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
100
25
0.250
* Total Citation Counts Rankings
Ranking Based On Selection: 18
Multivariate Statistics
Machine Learning
Multivariate Statistical Process Control
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
72
28
0.389
* Total Citation Counts Rankings
Ranking Based On Selection: 19
Analytical chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
52
48
0.923
* Total Citation Counts Rankings
Ranking Based On Selection: 20
Metaheuristics
Data science
Business process improvement
Supply chain planning and optimization
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44
9
0.205
* Total Citation Counts Rankings
Ranking Based On Selection: 21
IIoT
IT/OT Integration
Smart Manufacturing
Business Performance
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31
31
1.000
* Total Citation Counts Rankings
Rankings
354,930
1,605
1
Ranking Based On Selection: 1
Ionel Mugurel Ciobîcă
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,771
863
0.311
catalysis
theoretical chemistry
DFT
* Total Citation Counts Rankings
Rankings
398,784
1,845
2
Ranking Based On Selection: 2
Stefanus Otto
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,384
407
0.171
Chemistry
reactivity
catalysis
crystallography
* Total Citation Counts Rankings
Rankings
411,590
1,922
3
Ranking Based On Selection: 3
Denzil James Moodley
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,284
954
0.418
Catalyst preparation and scale-up
catalyst deactivation
Fischer-Tropsch Catalysis
Regeneration
* Total Citation Counts Rankings
Rankings
537,764
2,624
4
Ranking Based On Selection: 4
Kobus Visagie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,551
490
0.316
* Total Citation Counts Rankings
Rankings
573,151
2,839
5
Ranking Based On Selection: 5
Grant S. Forman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,400
361
0.258
* Total Citation Counts Rankings
Rankings
574,414
2,845
6
Ranking Based On Selection: 6
Martin Hanton
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,395
370
0.265
* Total Citation Counts Rankings
Rankings
687,692
3,500
7
Ranking Based On Selection: 7
Jan-Albert Van Den Berg
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,015
333
0.328
data science
computational chemistry
catalysis
data engineering
discrete optimisation
* Total Citation Counts Rankings
Rankings
786,707
4,108
8
Ranking Based On Selection: 8
Munaka Chris Maumela
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
768
277
0.361
Catalysis
Organic Chemistry
Phosphororus chemistry
ligand design & development
Inorganic Chemistry
* Total Citation Counts Rankings
Rankings
796,139
4,161
9
Ranking Based On Selection: 9
Amro S Elhag
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
747
442
0.592
* Total Citation Counts Rankings
Rankings
871,355
4,663
10
Ranking Based On Selection: 10
Roelof Coetzer
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
599
266
0.444
Design of experiments
Optimization
Data science
Statistical learning
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Compare your institution’s global, national, and city-level ranking with its 20 closest competitors and set strategic goals.
Gain insights from detailed performance analyses of scientists across 13 major disciplines, identify your strengths, improve weaknesses, and gain a competitive edge.. Check Your Free Sample Performance Analysis
* Total Citation Counts Rankings
Rankings
982,776
5,481
11
Ranking Based On Selection: 11
Arthur Bell
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
450
180
0.400
Automotive fuels
engines
combustion
* Total Citation Counts Rankings
Rankings
1,017,060
5,774
12
Ranking Based On Selection: 12
Berni Jooste
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
414
88
0.213
Piezoelectric thin films
CFD
Engineering Simulation
Energy Harvesting
Meta Models
* Total Citation Counts Rankings
Rankings
1,092,868
6,411
13
Ranking Based On Selection: 13
Jannie Scholtz
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
344
13
0.038
chemical engineering
Fischer Tropsch
Chemicals
Modelling
Business
* Total Citation Counts Rankings
Rankings
1,337,850
8,464
14
Ranking Based On Selection: 14
Selby Maphutha
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
199
84
0.422
Nanotechnology
carbon nanotubes
membrane separation
water purification
* Total Citation Counts Rankings
Rankings
1,503,801
9,796
15
Ranking Based On Selection: 15
Alisa Govender
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
143
104
0.727
Materials Science
Catalysis
* Total Citation Counts Rankings
Rankings
1,530,093
9,991
16
Ranking Based On Selection: 16
Martin Ginster
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
136
29
0.213
* Total Citation Counts Rankings
Rankings
1,680,012
11,102
17
Ranking Based On Selection: 17
Thulani Dlamini
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
100
25
0.250
Materials Science
Catalysis
Innovation Management
Innovation Systems Development
Strategy
* Total Citation Counts Rankings
Rankings
1,829,137
12,209
18
Ranking Based On Selection: 18
Ruan Francois Rossouw
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
72
28
0.389
Multivariate Statistics
Machine Learning
Multivariate Statistical Process Control
* Total Citation Counts Rankings
Rankings
1,960,578
13,299
19
Ranking Based On Selection: 19
Hlengiwe Mnculwane
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
52
48
0.923
* Total Citation Counts Rankings
Rankings
2,023,978
13,840
20
Ranking Based On Selection: 20
David Conradie
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
44
9
0.205
Metaheuristics
Data science
Business process improvement
Supply chain planning and optimization
* Total Citation Counts Rankings
Rankings
2,127,736
14,737
21
Ranking Based On Selection: 21
Musa Shilenge
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
31
31
1.000
IIoT
IT/OT Integration
Smart Manufacturing
Business Performance