Open Access
Review
Table 4
Sustainable Biohydrogen production via photo-fermentation and biophotolysis' literature search results.
| Years | Science Direct | Scopus | Published papers |
|---|---|---|---|
| 2009 | 3 | 1 | 4 |
| 2010 | 4 | 2 | 6 |
| 2011 | 20 | 4 | 24 |
| 2012 | 13 | 4 | 17 |
| 2013 | 23 | 6 | 29 |
| 2014 | 12 | 1 | 13 |
| 2015 | 15 | 3 | 18 |
| 2016 | 22 | 2 | 24 |
| 2017 | 14 | 2 | 16 |
| 2018 | 22 | 2 | 24 |
| 2019 | 37 | 2 | 39 |
| 2020 | 38 | 2 | 40 |
| Total Number | 223 | 31 | 254 |
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