Supported metal sulphide nanoclusters studied by HAADF-STEM

被引：11

作者：

Carlsson, A. ^{[1
]}

Brorson, M. ^{[1
]}

Topsoe, H. ^{[1
]}

机构：

[1] Haldor Topsoe Res Labs, DK-2800 Lyngby, Denmark

来源：

JOURNAL OF MICROSCOPY | 2006年 / 223卷

关键词：

graphite; HAADF-STEM; HDS; hydrodesulphurization; morphology; MoS2; Ni-Mo-S; support interaction; WS2;

D O I：

10.1111/j.1365-2818.2006.01614.x

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

The morphology of MoS2 and WS2 nanoclusters supported on high-surface area graphitic carbon was investigated using high angular annular dark field scanning transmission electron microscopy (HAADF-STEM). Most of the MoS2 (WS2) nanoclusters contain only a single S-Mo-S (S-W-S) layer and the most commonly encountered morphology is truncated triangular. This is in contrast to the hexagonal morphology of macroscopic MoS2 (WS2) crystals. When in addition to molybdenum (tungsten), nickel is also present, the regular nanoclusters are truncated to a larger extent, indicating that Ni has influenced the morphology by the formation of so-called Ni-Mo-S (Ni-W-S) structures. For these structures, the additional truncations are observed to lead to dodecahedral-like shapes.

引用

页码：179 / 181

页数：3

共 7 条

[1] Morphology of WS2 nanoclusters in WS2/C hydrodesulfurization catalysts revealed by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging [J].