Amorphous MoS3: clusters or chains? The structural evidence
作者： Simon J Hibble , Richard I Walton , David M Pickup , Alex C Hannon
DOI: 10.1016/S0022-3093(98)00393-7
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摘要: Abstract In spite of extensive studies, using a variety physical and chemical techniques, no consensus has yet been reached even as to the basic structural unit present in a-MoS3, material with interesting catalytic electrochemical properties. Here we neutron diffraction data for a-MoS3 which are compared both reciprocal- real-space predictions different models. We conclude that is built from MoS6 groups (〈rMoS〉=2.44 ± 0.01 A), linked together by shared sulfurs form Mo2S9 units, two molybdenum atoms forming Mo–Mo bonds at 2.75 ± 0.02 A. The presence triangular Mo3 units ruled out poor fit models based on these clusters. results consistent chain bridging sulfur bonded disulfide group. These link extended chains sharing terminal monosulfides, creating second (non-bonded) distance around 3.3
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