Novel Pulse Electrodeposited Co鈥揅u鈥揨nO Nanowire/tube Catalysts for C1鈥揅4 Alcohols and C2鈥揅6 (Except C5) Hydrocarbons from CO and H2

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• 作者：Mayank Gupta ; Viviane Schwartz ; Steven H. Overbury ; Karren More ; Harry M. Meyer ; III ; James J. Spivey
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：May 24, 2012
• 年：2012
• 卷：116
• 期：20
• 页码：10924-10933
• 全文大小：580K
• 年卷期：v.116,no.20(May 24, 2012)
• ISSN：1932-7455

文摘

Co鈥揅u鈥揨nO nanowire/tube catalysts were synthesized using pulse electrodeposition technique from a single aqueous electrolyte solution using a template synthesis technique. They were then tested as catalysts for the hydrogenation of CO to alcohols and higher hydrocarbons. Nanowires/tubes were grown inside the pores of membranes using a three-step sequential deposition process. First, a low current of 鈭?.9 mA/cm² was applied for 300 ms for Cu deposition, then a high current density of 鈭?1.5 mA/cm² for t ms (t = 500, 600, 750 ms) was applied for Co deposition, and finally no current was applied for 1200 ms so that the ions near the cathode replenish. The surface had a significantly different composition than the bulk. On the surface, there was more Co, less Cu, and more Zn. The catalyst showed the alcohol (C₁鈥揅₄) selectivity of 20.9 %C at H₂/CO = 3/1, GHSV = 16鈥?00 scc/h gcat, temperature = 270 掳C, pressure = 15 bar, and time-on-stream = 65 h.