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128: Nickel-iron based electrolysis

Problem:

Currently the most popular system used for water splitting, or water electrolysis, relies on precious – hence very expensive – metals such as platinum and iridium as catalysts.

Solution:

An electrolyzer based on nickel and iron, elements that are less expensive and more abundant in the environment.


Yu Seung Kim, a research scientist at Los Alamos National Laboratory and Yuehe Lin of Washington State University’s School of Mechanical and Materials Engineering, have developed a system that uses less expensive and more abundant materials. They worked to solve this problem by splitting water under alkaline, or basic, conditions with an anion exchange membrane electrolyzer based on nickel and iron, elements that are less expensive and more abundant in the environment.

By 2023, the global hydrogen generation market is anticipated to reach $199.1 billion. Promising markets for hydrogen energy comprise everything from power grid management and mass-energy conversion to fuel cells for cars. According to the duo, around 600 wind farms in the United States are prepared for direct connections to water electrolysis systems.

Discover Solution 129: Safety from flooding on higher ground

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