Israeli company H2Pro claims its highly efficient water-splitting technology will deliver green hydrogen at less than US$1 per kilogram before 2030. That’s a big deal; it would represent a 60-80 percent drop in green H2 prices, down to a level where it’s cheaper per unit of energy than current retail gasoline prices in the United States. The Hydrogen Council’s current projections don’t expect that kind of price drop until 2050, and even then it’s a best-case scenario.
[newatlas.com] – H2Pro’s dollar-a-kilo green hydrogen: a 20-year leap in clean energy?
Note that 1 kg of hydrogen contains about 3 times as much energy as 1 kg of gasoline. Additionally, hydrogen can be converted into kinetic energy at an efficiency of up to 60%, where gasoline scores merely 25% at best.
Some caution is well-advised here, as small start-ups are almost forced to be loud in order to attract investment capital. But the development is interesting, nevertheless, because of the pursuing of yet another technological approach. Eventually, the best methods will float to the top.
Electrolytic hydrogen production faces technological challenges to improve its efficiency, economic value and potential for global integration. In conventional water electrolysis, the water oxidation and reduction reactions are coupled in both time and space, as they occur simultaneously at an anode and a cathode in the same cell. This introduces challenges, such as product separation, and sets strict constraints on material selection and process conditions. Here, we decouple these reactions by dividing the process into two steps: an electrochemical step that reduces water at the cathode and oxidizes the anode, followed by a spontaneous chemical step that is driven faster at higher temperature, which reduces the anode back to its initial state by oxidizing water. This enables overall water splitting at average cell voltages of 1.44–1.60 V with nominal current densities of 10–200 mA cm−2 in a membrane-free, two-electrode cell. This allows us to produce hydrogen at low voltages in a simple, cyclic process with high efficiency, robustness, safety and scale-up potential.
[h2pro.co] – Company site
[nature.com] – Decoupled hydrogen and oxygen evolution by a two-step electrochemical–chemical cycle for efficient overall water splitting
[canli.dicp.ac.cn] – (pdf) Decoupled hydrogen and oxygen evolution by a two-step electrochemical–chemical cycle for efficient overall water splitting
[ammoniaenergy.org] – Israeli Group Develops New Electrolysis Technology
[bloomberg.com] – Gates-Backed Startup Joins Race to Make Green Hydrogen Cheaper