Hmmm. It's not a great article. It waits until the near the end to point out that H2 is not a direct source fuel like electricity or natural gas, but needs to be "made" using either electricity and gas or electricity on its own. In the gas + electricity model, you also have to include carbon capture technology, which requires - you guessed it - more electricity. H2 as a fuel is all about either convenience, or supporting applications which cant be made practical using electricity alone (which is another way of saying convenience).
The point here is that clean H2 is entirely dependant on clean electricity. We need continued significant investment in reducing our consumption of energy (better efficiency) and continued investment in those green electricity sources (tidal, wind, wave, hydro, solar, geothermal) coupled with efficient storage for peak load time shifting, in order to allow for the necessary efficiency losses incurred by H2 usage for convenience to be available.