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Home NEWS Science News Chemistry

Thanks to machine learning, the future of catalyst research is now!

Bioengineer by Bioengineer
February 3, 2021
in Chemistry
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New study defies conventions and proposes a technology-driven method to identify useful catalyst combinations

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Credit: JAIST

To date, research in the field of combinatorial catalysts has relied on serendipitous discoveries of catalyst combinations. Now, scientists from Japan have streamlined a protocol that combines random sampling, high-throughput experimentation, and data science to identify synergistic combinations of catalysts. With this breakthrough, the researchers hope to remove the limits placed on research by relying on chance discoveries and have their new protocol used more often in catalyst informatics.

Catalysts, or their combinations, are compounds that significantly lower the energy required to drive chemical reactions to completion. In the field of “combinatorial catalyst design,” the requirement of synergy–where one component of a catalyst complements another–and the elimination of ineffective or detrimental combinations are key considerations. However, so far, combinatorial catalysts have been designed using biased data or trial-and-error, or serendipitous discoveries of combinations that worked. A group of researchers from Japan has now sought to change this trend by trying to devise a repeatable protocol that relied on a screening instrument and software-based analysis.

Their new study, published in ACS Catalysis, details the identification of effective catalyst combinations, using the proposed protocol, for the oxidative coupling of methane (OCM). OCM is a widely used chemical reaction used to convert methane into useful gases in the presence of oxygen and the catalyst. Elaborating on the motivations behind the study, Dr. Toshiaki Taniike, Professor at the School of Materials Science, Japan Advanced Institute of Science and Technology and corresponding author of the study, says, “Combinatorial catalyst design is hardly generalizable, and the empirical aspect of the research has biased the literature data toward accidentally found combinations”.

To derive a bias-free dataset from OCM for devising the protocol, the researchers sampled randomly 300 solid catalysts from a vast materials space containing upwards of 36,000 catalysts! Screening such a large number of catalysts is near impossible by human standards. Hence, the team used a high-throughput screening instrument to evaluate their performance at facilitating OCM. The obtained dataset was used to outline the novel protocol, aimed at providing a guideline for catalyst design. This was implemented in the form of a “decision tree classification,” which is a form of machine learning that helped in understanding the efficiency of the selected catalyst combinations, in giving better OCM yield. This, in turn, helped in drawing up the required catalyst design guidelines.

Interestingly, the results showed that, even with random sampling, 51 out of the 300 catalysts gave a better OCM yield when compared to the alternative non-catalytic process. Explaining the potential implications of their discovery, Dr. Keisuke Takahashi, Associate Professor at Hokkaido University and co-author of this study, says, “The combination of high throughput experimentation and data science has already demonstrated the power of bias-free catalyst big data in finding novel catalysts as well as a catalyst design guideline. It is also important to state the essentiality of these approaches for implementing such a demanding study in a realistic time frame. By equipping all the essential techniques of the study, truly nonempirical catalyst developments could be realized”.

Indeed, we can hope, along with the scientists, that this strategy will “catalyze” several future material science discoveries!

###

About Japan Advanced Institute of Science and Technology, Japan

Founded in 1990 in Ishikawa prefecture, the Japan Advanced Institute of Science and Technology (JAIST) was the first independent national graduate school in Japan. Now, after 30 years of steady progress, JAIST has become one of Japan’s top-ranking universities. JAIST counts with multiple satellite campuses and strives to foster capable leaders with a state-of-the-art education system where diversity is key; about 40% of its alumni are international students. The university has a unique style of graduate education based on a carefully designed coursework-oriented curriculum to ensure that its students have a solid foundation on which to carry out cutting-edge research. JAIST also works closely both with local and overseas communities by promoting industry-academia collaborative research.

About Professor Toshiaki Taniike from Japan Advanced Institute of Science and Technology, Japan

Dr. Toshiaki Taniike is a Professor and the Director of International Research Center for Materials Informatics, at the School of Material Science, Japan Advanced Institute of Science and Technology, Japan. Dr. Taniike’s specialties include inorganic compounds and materials chemistry. He has more than 140 publications like research articles, review papers etc. in reputed journals, and several books, to his credit. In addition, he is a valuable member of The Japan Petroleum Institute, Materials Life Society, The Society of Polymer Science, Catalysis Society of Japan, and The Surface Science Society of Japan.

Media Contact
Toshiaki Taniike
[email protected]

Original Source

https://www.jaist.ac.jp/english/

Related Journal Article

http://dx.doi.org/10.1021/acscatal.0c04629

Tags: Chemistry/Physics/Materials SciencesMaterials
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