Citation Rankings
Highly Cited Researchers
University of the Witwatersrand Highly Cited Researchers CitationNatural Sciences / Chemical Sciences Rankings 2025
The Citation Rankings (Highly Cited Researchers) 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
Electrochemistry
Batteries
Fuel Cells
Electrolyzers
Sensors
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,795
5,851
0.496
* Total Citation Counts Rankings
Ranking Based On Selection :2
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,401
3,157
0.493
* Total Citation Counts Rankings
Ranking Based On Selection :3
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,375
1,795
0.282
* Total Citation Counts Rankings
Ranking Based On Selection :4
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,890
1,355
0.277
* Total Citation Counts Rankings
Ranking Based On Selection :5
Structural Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,501
1,989
0.568
* Total Citation Counts Rankings
Ranking Based On Selection :6
Herpetology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,186
1,782
0.559
* Total Citation Counts Rankings
Ranking Based On Selection :7
Crystallography
XRD
Solid state chemistry
Inorganic chemistry
Energy Materials
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,129
1,892
0.605
* Total Citation Counts Rankings
Ranking Based On Selection :8
Inorganic and bioinorganic chemistry
biochemistry
crystallography
drug design
molecular simulations
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,542
644
0.253
* Total Citation Counts Rankings
Ranking Based On Selection :9
Electrochemistry
Analytical Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,885
462
0.245
* Total Citation Counts Rankings
Ranking Based On Selection :10
Science (Chemistry) Education
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,661
1,360
0.819
* Total Citation Counts Rankings
Ranking Based On Selection :11
synthetic organic chemistry
medicinal chemistry
biocatalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,601
905
0.565
* Total Citation Counts Rankings
Ranking Based On Selection :12
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,600
1,213
0.758
* Total Citation Counts Rankings
Ranking Based On Selection :13
Chemical Crystallography
solid-state reactions
polymorphism
phase-transformations
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,545
325
0.210
* Total Citation Counts Rankings
Ranking Based On Selection :14
Organic synthesis
Medicinal Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,222
418
0.342
* Total Citation Counts Rankings
Ranking Based On Selection :15
Catalysis for renewable energy molecules production
water treatment and photocatalysis.
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
979
804
0.821
* Total Citation Counts Rankings
Ranking Based On Selection :16
Carbon Nanomaterials
Materials Chemistry
Environmental Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
941
427
0.454
* Total Citation Counts Rankings
Ranking Based On Selection :17
Polysaccharide chemistry
hydrogels
natural products
material science
hydrocolloids
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
617
440
0.713
* Total Citation Counts Rankings
Ranking Based On Selection :18
Chemistry
Material Science
Nanotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
507
444
0.876
* Total Citation Counts Rankings
Ranking Based On Selection :19
Organic chemistry
Biomaterials
Drug discovery
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
449
413
0.920
* Total Citation Counts Rankings
Ranking Based On Selection :20
Li-Ion battery
NMC
LMO
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
435
83
0.191
* Total Citation Counts Rankings
Ranking Based On Selection :21
Peptide Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
408
211
0.517
* Total Citation Counts Rankings
Ranking Based On Selection :22
Chemistry
Materials
Nanotechnology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
391
333
0.852
* Total Citation Counts Rankings
Ranking Based On Selection :23
Inorganic chemistry - Synthesis
Organometallic chemistry
Kinetics/reaction mechanisms
Catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
368
285
0.774
* Total Citation Counts Rankings
Ranking Based On Selection :24
Chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
275
249
0.905
* Total Citation Counts Rankings
Ranking Based On Selection :25
Medicinal chemistry
Drug delivery
analytical chemistry
cancer
infections
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
238
235
0.987
* Total Citation Counts Rankings
Rankings
81,009
276
40
Ranking Based On Selection: 1
Kenneth Ikechukwu Ozoemena
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
11,795
5,851
0.496
Electrochemistry
Batteries
Fuel Cells
Electrolyzers
Sensors
* Total Citation Counts Rankings
Rankings
160,471
630
77
Ranking Based On Selection: 2
Ewa Cukrowska
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,401
3,157
0.493
* Total Citation Counts Rankings
Rankings
161,163
634
79
Ranking Based On Selection: 3
Helder M Marques
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,375
1,795
0.282
* Total Citation Counts Rankings
Rankings
209,445
876
112
Ranking Based On Selection: 4
Charles B De Koning
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,890
1,355
0.277
* Total Citation Counts Rankings
Rankings
283,448
1,227
149
Ranking Based On Selection: 5
Andreas Lemmerer
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,501
1,989
0.568
* Total Citation Counts Rankings
Rankings
307,028
1,358
160
Ranking Based On Selection: 6
Graham Alexander
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,186
1,782
0.559
* Total Citation Counts Rankings
Rankings
311,698
1,379
161
Ranking Based On Selection: 7
David Gordon Billing
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
3,129
1,892
0.605
Crystallography
XRD
Solid state chemistry
Inorganic chemistry
Energy Materials
* Total Citation Counts Rankings
Rankings
368,607
1,689
192
Ranking Based On Selection: 8
Orde Q. Munro
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,542
644
0.253
Inorganic and bioinorganic chemistry
biochemistry
crystallography
drug design
molecular simulations
* Total Citation Counts Rankings
Rankings
459,647
2,190
238
Ranking Based On Selection: 9
Andrew Crouch
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,885
462
0.245
Electrochemistry
Analytical Chemistry
* Total Citation Counts Rankings
Rankings
501,040
2,420
267
Ranking Based On Selection: 10
Elizabeth Mavhunga
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,661
1,360
0.819
* Total Citation Counts Rankings
Rankings
513,536
2,493
272
Ranking Based On Selection: 11
Moira Bode
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,601
905
0.565
synthetic organic chemistry
medicinal chemistry
biocatalysis
* Total Citation Counts Rankings
Rankings
513,672
2,494
273
Ranking Based On Selection: 12
Nosipho Moloto
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,600
1,213
0.758
* Total Citation Counts Rankings
Rankings
525,616
2,565
277
Ranking Based On Selection: 13
Demetrius Levendis
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,545
325
0.210
Chemical Crystallography
solid-state reactions
polymorphism
phase-transformations
* Total Citation Counts Rankings
Rankings
606,660
3,054
320
Ranking Based On Selection: 14
Amanda Rousseau
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,222
418
0.342
Organic synthesis
Medicinal Chemistry
* Total Citation Counts Rankings
Rankings
685,942
3,498
352
Ranking Based On Selection: 15
John Moma
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
979
804
0.821
Catalysis for renewable energy molecules production
water treatment and photocatalysis.
* Total Citation Counts Rankings
Rankings
700,336
3,581
359
Ranking Based On Selection: 16
Pranav K. Tripathi
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
941
427
0.454
Carbon Nanomaterials
Materials Chemistry
Environmental Chemistry
* Total Citation Counts Rankings
Rankings
846,654
4,469
441
Ranking Based On Selection: 17
Dharmesh Chejara
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
617
440
0.713
Polysaccharide chemistry
hydrogels
natural products
material science
hydrocolloids
* Total Citation Counts Rankings
Rankings
912,083
4,915
474
Ranking Based On Selection: 18
Pierre Kalenga Mubiayi
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
507
444
0.876
Chemistry
Material Science
Nanotechnology
* Total Citation Counts Rankings
Rankings
961,515
5,293
522
Ranking Based On Selection: 19
Priyamvada Pradeep
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
449
413
0.920
Organic chemistry
Biomaterials
Drug discovery
* Total Citation Counts Rankings
Rankings
974,969
5,418
539
Ranking Based On Selection: 20
Itumeleng Mokhosi
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
435
83
0.191
* Total Citation Counts Rankings
Rankings
1,000,908
5,629
554
Ranking Based On Selection: 21
Maya Makatini
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
408
211
0.517
* Total Citation Counts Rankings
Rankings
1,017,622
5,783
574
Ranking Based On Selection: 22
Tumelo Phaahlamohlaka
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
391
333
0.852
Chemistry
Materials
Nanotechnology
* Total Citation Counts Rankings
Rankings
1,041,778
5,980
589
Ranking Based On Selection: 23
Andrew J. Swarts
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
368
285
0.774
Inorganic chemistry - Synthesis
Organometallic chemistry
Kinetics/reaction mechanisms
Catalysis
* Total Citation Counts Rankings
Rankings
1,160,422
6,993
687
Ranking Based On Selection: 24
Izak Kotzé
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
275
249
0.905
* Total Citation Counts Rankings
Rankings
1,220,873
7,537
722
Ranking Based On Selection: 25
Sifiso Sakhiseni Makhathini
University of the Witwatersrand
Johannesburg, South Africa
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
238
235
0.987
Medicinal chemistry
Drug delivery
analytical chemistry
cancer
infections