Dr. Caixia Qi, received her Ph. D degree from Lanzhou Institute of Chemical Physics of Chinese Academy of Sciences in 1996 and served as a STA postdoctoral fellow, an associated researcher and a guest researcher in Osaka National Research Institute of Japan (Kansai AIST), Royal Military College of Canada and Tokyo Metropolitan University, respectively. Now, she is a professor in Yantai University and was awarded Shandong Taishan Scholar in 2011. She is engaged in the research of gold catalysis and populating industrial applications of gold nanotechnology. In 2011, she promoted and organized the Shandong Applied Research Centre of Gold Nanotechnology (Au-SDARC), an open-end industry-academia- research platform for speeding up industrial applications of gold which features regional advantages and compliance of international standards.
A series of gold-based catalysts supported on the composite support of Fe–La–Al2O3 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 H2-rich stream and low temperature CO oxidation in O2-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 evidenced through examination with H2-TPR, XPS, and HRTEM-FFT techniques. Very promising gold catalysts for polymer electrolyte membrane fuel cell with positive results in activity, CO2 selectivity, and thermal stability and long-term storage and on-line stability were obtained. Although H2 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. The results from this study will shed light on the experimental design of novel noble metal catalysts with good activity and especially better stability.