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Brian Westenhaus

Brian Westenhaus

Brian is the editor of the popular energy technology site New Energy and Fuel. The site’s mission is to inform, stimulate, amuse and abuse the…

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Cutting-Edge AI Identifies New Catalysts for Hydrogen Electrolysis

  • AI technique developed to rapidly identify high-performance, platinum-group-free electrode materials for water electrolysis, crucial for green hydrogen production.
  • New electrocatalytic materials found to be composed of abundant elements like manganese, iron, nickel, zinc, and silver, offering a cheaper alternative to current methods.
  • This advancement demonstrates the power of AI in accelerating material discovery, potentially shortening the research timeline from years to months and advancing efforts towards carbon neutrality.
AI

A National Institute for Materials Science, Japan research team has developed an AI technique capable of expediting the identification of materials with desirable characteristics. Using this technique, the team was able to discover high-performance water electrolyzer electrode materials free of platinum-group elements – substances previously thought to be indispensable in water electrolysis. These materials may be used to reduce the cost of large-scale production of green hydrogen – a next-generation energy source. The paper reporting the work has been published in ACS Central Science.

Large-scale production of green hydrogen using water electrolyzers is hoped to be a viable means of achieving carbon neutrality.

An efficient Artificial Intelligence method for identifying electrocatalysts with desirable functionality. Image Credit: National Institute for Materials Science, Japan. Both the press release and the open access study paper offer considerably more information and images.

Currently available water electrolyzers rely on expensive, scarce platinum-group elements as their main electrocatalyst components to accelerate the slow oxygen evolution reaction (OER) – an electrolytic water reaction that can produce hydrogen.

To address this issue, research is underway to develop platinum-group-free, cheaper OER electrocatalysts composed of relatively abundant chemical elements compatible with large-scale green hydrogen production.

However, identifying the optimum chemical compositions of such electrocatalysts from an infinitely large number of possible combinations had been found to be enormously costly, time-consuming and labor-intensive.

Related: Artificial Intelligence Could Trigger a Natural Gas Boom in Europe

This NIMS research team recently developed an AI technique capable of accurately predicting the compositions of materials with desirable characteristics by switching prediction models depending on the sizes of the datasets available for analysis.

Using this AI, the team was able to identify new, effective OER electrocatalytic materials from about 3,000 candidate materials in just a single month.

For reference, manual, comprehensive evaluation of these 3,000 materials was estimated to take almost six years.

These newly discovered electrocatalytic materials can be synthesized using only relatively cheap and abundant metallic elements: manganese (Mn), iron (Fe), nickel (Ni), zinc (Zn) and silver (Ag). Experiments found that under certain conditions, these electrocatalytic materials exhibit superior electrochemical properties to ruthenium (Ru) oxides – the existing electrocatalytic materials with the highest OER activity known.

In Earth’s crust, Ag is the least abundant element among those constituting the newly discovered electrocatalytic materials.

However, its crustal abundance is nearly 100 times that of Ru, indicating that these new electrocatalytic materials can be synthesized in sufficiently large amounts to enable hydrogen mass-production using water electrolyzers.

These results demonstrated that this AI technique could be used to expand the limits of human intelligence and dramatically accelerate the search for higher-performance materials.

Related: Two Countries That Could Break Putin's Gas Grip On Europe

Using the technique, the team plans to expedite its efforts to develop new materials — mainly water electrolyzer electrode materials – in order to improve the efficiency of various electrochemical devices contributing to carbon neutrality.

This project was carried out by a NIMS research team led by Ken Sakaushi (Principal Researcher) and Ryo Tamura (Team Leader). This work was conducted in conjunction with another project entitled, “High throughput search for seawater electrolysis catalysts by combining automated experiments with data science” (grant number: JPMJMI21EA) under the JST-Mirai Program mission area, “low carbon society.”

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One is a bit troubled by not seeing an alloy listed or a lab test run. The materials might need synthesized and tested perhaps? The press release seems to be a conclusion without a hard fact.

Let’s hope the “discoveries” are factual truths. After last week’s AI news, AI isn’t building up any confidence just yet. Folks need to remember that an AI and a person’s mind, just like computers have been since their beginning, only function with what information is at hand. If there is garbage in there at the start – garbage is what comes out.

One does hope this is a home run, but much more needs tested and revealed.

By Brian Westenhaus via New Energy and Fuel 

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