Evidence for strong metal-support interaction (SMSI) in Rh/TiO2 system
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- Vishwanathan, V. & Narayanan, S. Catal Lett (1993) 21: 183. doi:10.1007/BF00767384
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Rh(1 wt%)/TiO2 samples were prepared by both incipient wetness and ion-exchange methods and were characterised by temperature programmed desorption (TPD), electron spin resonance (ESR), mass spectrometry (MS) and hydrogen chemisorption. The incipient wetness sample was found to be more favourable for the onset of SMSI state. The reduction of Ti4+ to Ti3+ during hydrogen spillover or due to the lattice oxygen (O2−) deficiency seemed to be responsible for the SMSI state. A mechanistic pathway is proposed to explain the onset of SMSI behaviour.