Prototype Atomically Dispersed Supported Metal Catalysts: Iridium and Platinum

Chen, Yizhen; Sun, Hanlei; Gates, Bruce C.

doi:10.1002/smll.202004665

Prototype Atomically Dispersed Supported Metal Catalysts: Iridium and Platinum

Journal Article · Fri Nov 13 00:00:00 EST 2020 · Small

DOI:https://doi.org/10.1002/smll.202004665· OSTI ID:1804811

Chen, Yizhen ^[1]; Sun, Hanlei ^[2]; ^[3]

Department of Chemical Engineering University of California‐Davis Davis CA 95616 USA, Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 P. R. China
Department of Chemical Engineering University of California‐Davis Davis CA 95616 USA, Department of Chemical and Biochemical Engineering Xiamen University Xiamen Fujian 361005 P. R. China
Department of Chemical Engineering University of California‐Davis Davis CA 95616 USA

Abstract

When metal nanoparticles on supports are made smaller and smaller—to the limit of atomic dispersion—they become cationic and take on new catalytic properties that are only recently being discovered. The synthesis of these materials is reviewed, including their structure characterization—especially by atomic‐resolution electron microscopy and X‐ray absorption and infrared spectroscopies—and relationships between structure and catalyst performance, for reactions including hydrogenations, oxidations, and the water gas shift. Structure determination is challenging because of the intrinsic nonuniformity of the support surfaces—and therefore the structures on them—but fundamental understanding has advanced rapidly, benefiting from nearly uniform catalysts consisting of metals on well‐defined—crystalline—supports and their characterization by spectroscopy and microscopy. Recent advances in atomic‐resolution electron microscopy have spurred the field, providing stunning images and deep insights into structure. The iridium catalysts have typically been made from organoiridium precursors, opening the way to understanding and control of the metal–support bonding and ligands on the metal, including catalytic reaction intermediates. Platinum catalysts are usually made with less precision, from salt precursors, but they catalyze a wider array of reactions than the iridium, typically being stable at higher temperatures and seemingly offering rich prospect for discovery of new catalysts.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-04ER15513

OSTI ID:: 1804811

Alternate ID(s):: OSTI ID: 1849497

Journal Information:: Small, Journal Name: Small Journal Issue: 16 Vol. 17; ISSN 1613-6810

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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