When the American Association for the Advancement of Science propagates propaganda and demagoguery!
No doubt seawater splitting into hydrogen has great potential! But to sell it as panacea is dubious!
How green? This may very well be largely wishful thinking or worse!
I have recently blogged here my critical opinion about hydrogen and water! And they like us to forget about the Hindenburg disaster! Here is another of my blog posts about seawater splitting.
"Few climate solutions come without downsides. “Green” hydrogen, made by using renewable energy to split water molecules, could power heavy vehicles and decarbonize industries such as steelmaking without spewing a whiff of carbon dioxide [???]. ..."
From the abstract (notice that this abstract of a scientific research paper is full of ideological terms]:
"Electrochemical saline water electrolysis using renewable energy as input is a highly desirable [???] and sustainable method for the mass production of green [???] hydrogen; however, its practical viability is seriously challenged by insufficient durability because of the electrode side reactions and corrosion issues arising from the complex components of seawater. Although catalyst engineering using polyanion coatings to suppress corrosion by chloride ions or creating highly selective electrocatalysts has been extensively exploited with modest success, it is still far from satisfactory for practical applications. Indirect seawater splitting by using a pre-desalination process can avoid side-reaction and corrosion problems, but it requires additional energy input, making it economically less attractive. In addition, the independent bulky desalination system makes seawater electrolysis systems less flexible in terms of size. Here we propose a direct seawater electrolysis method for hydrogen production that radically addresses the side-reaction and corrosion problems. A demonstration system was stably operated at a current density of 250 milliamperes per square centimetre for over 3,200 hours under practical application conditions without failure. This strategy realizes efficient, size-flexible and scalable direct seawater electrolysis in a way similar to freshwater splitting without a notable increase in operation cost, and has high potential for practical application. Importantly, this configuration and mechanism promises further applications in simultaneous water-based effluent treatment and resource recovery and hydrogen generation in one step."
A membrane-based seawater electrolyser for hydrogen generation (no public access)
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