RuO2·xH2O Supported on Carbon Nanotubes as a Highly Active Catalyst for Methanol Oxidation

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• 作者：Hao Yu ; Kai Zeng ; Xiaobo Fu ; Yan Zhang ; Feng Peng ; Hongjuan Wang ; Jian Yang
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：August 7, 2008
• 年：2008
• 卷：112
• 期：31
• 页码：11875-11880
• 全文大小：429K
• 年卷期：v.112,no.31(August 7, 2008)
• ISSN：1932-7455

文摘

Highly dispersed ruthenium oxide clusters were synthesized on carbon nanotubes (CNTs) to form RuO₂·xH₂O/CNT catalyst by a homogeneous oxidation precipitation method. Methanol oxidation was carried out on RuO₂·xH₂O/CNT at low temperatures for the production of diverse oxygenous products, such as methyl formate (MF) and dimethoxymethane (DMM). Unprecedented conversion rate of methanol, high up to 545 mol_MeOH (mol Ru_surface)⁻¹ h⁻¹, was observed at 120 °C. The effect of structural water in RuO₂ domains on the performances of the methanol oxidation reaction was investigated by annealing them in N₂ at elevated temperatures. The dehydration of RuO₂ clusters decreased the oxidation ability and changed the selectivity patterns. It was suggested that the behaviors of RuO₂ during the annealing process may be strongly influenced by the interaction between RuO₂ and CNTs.