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报告人：Prof. Abhaya Datye
University of New Mexico
地点：北京大学化学与分子工程学院百廿纪念报告厅（A204）
From nanoparticles to single atoms: Towards the design of self-healing Catalysts
The early work in my research group was motivated by the need to image surfaces of metal nanoparticles. Model catalysts [1] allowed imaging of nanoparticles from multiple orientations, without having to tilt the sample, and to detect subtle changes in surface structure. This allowed us to determine how oxidation-reduction treatments could roughen up metal surfaces [2], leading to dramatic enhancements in catalytic activity. Our lab provided the first direct images of amorphous overlayers formed by high temperature reduction supporting the models for SMSI on TiO2-supported catalysts [3].The initial work led to numerous industrial collaborations. A sabbatical at Haldor Topsoe [4] allowed us to formulate the mechanisms underlying catalyst sintering [5, 6]. The rapid sintering of Pt during oxidative treatments was a vexing problem, which was solved by trapping Pt atoms on ceria and a new approach to thermally stable single atom catalysts emerged [7]. The long-term stability of Pt catalysts under diesel oxidation was still a mystery, till we learned that the PdO phase helps to make the catalyst self-healing [8]. Our current work now focuses on atom trapping to improve the thermal stability of single atom catalysts and making them more industrially applicable [9]. This has broad applications in high temperature catalytic reactions such as emission control [10], alkane dehydrogenation [11] and reforming, which will be discussed in this presentation.The ultimate goal is to make heterogenous catalysts self-healing, so they can function with high activity and selectivity for long times.This research was made possible by continuing financial support from the NSF, DOE Office of Science, ACS-PRF and from industry.1. Datye, A.K. and A.D. Logan. in Proc. Electon Microscopy Society of America. 1986.2. Chakraborti, S., A.K. Datye, and N.J. Long, J. Catal., 1987. 108(2): p. 444-51.3. Logan, A.D., et al., Langmuir, 1988. 4: p. 827-830.4. Sehested, J., et al., Journal of Catalysis, 2001. 197(1): p. 200-209.5. Hansen, T.W., et al., Accounts of Chemical Research, 2013. 46(8): p. 1720-1730.6. Challa, S.R., et al., Journal Of The American Chemical Society, 2011. 133(51): p. 20672-20675.7. Jones, J., et al., Science, 2016. 353(6295): p. 150-154.8. Porter, S., et al., ACS Catalysis, 2023. 13(8): p. 5456-5471.9. Datye, A.K. and H. Guo, Nature Communications, 2021. 12(1): p. 1-3.10. Datye, A.K. and M. Votsmeier, Nature Materials, 2021. 20(8): p. 1049-1059.11. Pham, H.N., et al., ACS Catalysis, 2016. 6(4): p. 2257-2264.
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Prof.Abhaya Datye has been on the faculty at the University of New Mexico since 1984 after receiving his Ph.D. in chemical engineering from the University of Michigan (advisor Johannes Schwank). He has authored 250 publications, 7 patents and has presented 166 invited lectures around the world. His published work has received over 28k citations with an h-index of 86 (Google Scholar). He is a fellow of the AIChE, the Microscopy Society of America and the Royal Society of Chemistry. He has been actively involved in the North American Catalysis Society, serving as co-chair for the Denver NAM 2017, program co-chair for the Snowbird NAM 1995 and Vice Chair for the International Catalysis Congress 2020. He was the Chair of the Gordon Research Conference on Catalysis in 2010. He has served on the American Chemical Society Petroleum Research Fund Advisory board (2014 – 2020), on the Frontiers of Catalysis board at Haldor Topsoe in Denmark and on the Heterogeneous Catalysis Advisory board at Sasol. He was elected as a board member for the North American Catalysis Society (2017-2021 & 2021 – 2024) and he is serving on the Department of Energy Basic Energy Sciences (BESAC) advisory committee.
His research group has pioneered the development of electron microscopy tools for the study of catalysts. Current work in his group involves fundamental studies of catalyst sintering, especially the stabilization of isolated single atoms on supports for high temperature catalytic applications such as exhaust catalysis and alkane conversion. While characterization of catalysts is a primary focus of his research, this has allowed him to be actively engaged in microengineering of catalysts, developing novel functionality through the design of catalyst supports and surface morphology. In the area of Fischer-Tropsch catalysis, he has worked on both Cobalt and Iron F-T catalysts to investigate aspects such as attrition resistance, catalyst deactivation and the role of promoters and support.His research has been recognized through numerous awards, including the ACS CATL award for Exceptional Achievements in Catalysis (2024), Giuseppe Parravano award for Excellence in Catalysis from the Michigan Catalysis Society (2022), the Robert L. Burwell Lectureship of the North American Catalysis Society (2019), Walter J Weber Distinguished Lectureship from the University of Michigan Chemical Engineering (2019), Eastman Lectureship from the University of South Carolina (2019) the John Matthews Lectureship from the Microscopy Society of South Africa (2012) and the 2008 Award for Excellence from the NSF IUCRC program, In 2016, the ACS publication Chemical & Engineering News included his research on single atom catalysis as one of the top 10 stories for the year.![]()
