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Journal articles
Magnifying the morphology change induced by a nickel promoter in tungsten(IV) sulfide industrial hydrocracking catalyst : a HAADF-STEM and DFT study.
Abstract : Changes in the two-dimensional (2D) morphology of nonpromoted WS2 and Ni-promoted WS2 (NiWS) catalytically active nanolayers supported on amorphous silica-alumina (ASA) are revealed by aberration-corrected scanning transmission electron microscopy and rationalized by density functional theory calculations. The presence of the Ni atoms modifies the triangular shape of nonpromoted WS2/ASA nanolayers into a more hexagonal one for NiWS/ASA by stabilizing the S edge more strongly than the W edge. The higher catalytic activity induced by the addition of the promoter confirms the relevance of such a morphology effect for industrial catalysts.
https://hal-ifp.archives-ouvertes.fr/hal-01052710
Contributor : Françoise Bertrand Connect in order to contact the contributor
Submitted on : Monday, July 28, 2014 - 3:13:22 PM
Last modification on : Wednesday, December 1, 2021 - 3:32:09 PM
Contributor : Françoise Bertrand Connect in order to contact the contributor
Submitted on : Monday, July 28, 2014 - 3:13:22 PM
Last modification on : Wednesday, December 1, 2021 - 3:32:09 PM
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