| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| international journal of hydrogen energy | 1.76 | 0.8 | 3946 | 43 | 40 |
| international | 0.72 | 0.5 | 5112 | 15 | 13 |
| journal | 0.66 | 0.5 | 5355 | 61 | 7 |
| of | 1.09 | 0.8 | 2728 | 6 | 2 |
| hydrogen | 1.65 | 1 | 3972 | 16 | 8 |
| energy | 0.31 | 0.6 | 5419 | 16 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| international journal of hydrogen energy | 0.27 | 0.6 | 707 | 91 |
