Au/Cu-Fe-La-Al2O3: A highly active, selective and stable catalysts for preferential oxidation of carbon monooxide

作者：Sun, Xun; Su, Huijuan; Lin, Qingquan; Han, Chung; Zheng, Yuhua; Sun, Libo; Qi, Caixia^*

来源：Applied Catalysis A: General , 2016, 527: 19-29.

DOI：10.1016/j.apcata.2016.08.014

• Gold catalysts
• Copper oxide
• CO-PROX
• CO oxidation
• Stability

A series of gold-based catalysts supported by Fe-La-Al2O3 composite doped with various amounts of copper were prepared using a modified deposition-precipitation method. Investigations were carried out based on the reaction of the preferential carbon monoxide oxidation (CO-PROX) in H-2-rich stream and CO oxidation at low temperatures in an O-2-rich stream as a reference to examine the effects of copper on the catalytic performance. The high dispersion of gold nanoparticles in alumina-based support, the formation of Au-Cu alloy, and the close contacts of these neat or alloyed nanoparticles with CuO species, making Au partially positively charged, were examined with H-2-TPR, XPS, and HRTEM-FFT techniques. Gold catalysts were obtained with very promising performance for polymer electrolyte membrane fuel cell with positive results in activity, CO2 selectivity, and thermal stability and long-term storage and online stability. Although H-2 addition decreased the rate of CO oxidation over the studied gold catalysts, the activity and selectivity in CO2 formation were continuously improved with an increase in copper loading.

• 出版日期2016-10-25
• 单位烟台大学