Volume 208, 2018

Supported cluster catalysts synthesized to be small, simple, selective, and stable

Abstract

Molecular metal complexes on supports have drawn wide attention as catalysts offering new properties and opportunities for precise synthesis to make uniform catalytic species that can be understood in depth. Here we highlight advances in research with catalysts that are a step more complex than those incorporating single, isolated metal atoms on supports. These more complex catalysts consist of supported noble metal clusters and supported metal oxide clusters, and our emphasis is placed on some of the simplest and best-defined of these catalysts, made by precise synthesis, usually with organometallic precursors. Characterization of these catalysts by spectroscopic, microscopic, and theoretical methods is leading to rapid progress in fundamental understanding of catalyst structure and function, and to expansion of this class of materials. The simplest supported metal clusters incorporate two metal atoms each—they are pair-site catalysts. These and clusters containing several metal atoms have reactivities determined by the metal nuclearity, the ligands on the metal, and the supports, which themselves are ligands. Metal oxide clusters are also included in the discussion presented here, with Zr6O8 clusters that are nodes in metal–organic frameworks being among those that are understood the best. The surface and catalytic chemistries of these metal oxide clusters are distinct from those of bulk zirconia. A challenge in using any supported cluster catalysts is associated with their possible sintering, and recent research shows how metal nanoparticles can be encapsulated in sheaths with well-defined porous structures—zeolites—that make them highly resistant to sintering.

Graphical abstract: Supported cluster catalysts synthesized to be small, simple, selective, and stable

Associated articles

Article information

Article type
Paper
Submitted
14 ဧပြီ 2018
Accepted
11 မေ 2018
First published
11 မေ 2018

Faraday Discuss., 2018,208, 9-33

Author version available

Supported cluster catalysts synthesized to be small, simple, selective, and stable

E. Guan, C. Fang, D. Yang, L. Wang, F. Xiao and B. C. Gates, Faraday Discuss., 2018, 208, 9 DOI: 10.1039/C8FD00076J

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements