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In-Situ Atomic Force Microscopy Study of the Dissolution of Nanoporous SAPO-34 and SAPO-18

Abstract

In-situ atomic force microscopy has been used to investigate the dissolution behavior of industrially relevant silicoaluminophosphate catalysts SAPO-34 and SAPO-18. Spiral growth is prevalent on these materials and it is common for the spirals to be composites of multiple dislocation sources. The spirals dissolve via classical step retreat and the structure dissolves in a two-step process via unstable intermediates. The data support the proposition that the terminating surface of SAPO-34 is composed of double 6-rings. SAPO-34 and SAPO-18 both dissolve by removal of the same structural units with similar mechanisms.

Category

Academic article

Language

English

Author(s)

Affiliation

  • University of Manchester
  • SINTEF Industry / Process Technology

Year

2015

Published in

Journal of Physical Chemistry C

ISSN

1932-7447

Publisher

American Chemical Society (ACS)

Volume

119

Issue

49

Page(s)

27580 - 27587

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