【作者】 苗雨欣； 王静； 李文翠；

【Author】 Yu-Xin Miao;Jing Wang;Wen-Cui Li;State Key Laboratory of Fine Chemicals,Dalian University of Technology;

【机构】 大连理工大学化工学院精细化工国家重点实验室；

【摘要】 在PEMFC工作温度（80-120℃）条件下,具有高活性和性能稳定的Au催化剂合成仍是当前的研究难点。在前期工作基础上,我们利用Au与CeO₂之间的相互作用,采用CeO₂对氧化铝表面进行修饰,在催化剂表面引入了氧空位,从而增强Au与Al₂O₃载体之间的相互作用,结果表明,所制备的Au-Cu/CeO₂/Al₂O₃催化剂不仅可以改善催化剂的CO-PROX反应性能,而且极大拓宽了其CO完全转化温度窗口（80-110℃）,这可能与Ce的引入对催化剂中Au与载体相互作用及其还原性能的调变有关。更多还原

【Abstract】 At the operating temperature（80-120 ℃） of a proton exchange membrane fuel cell（PEMFC）,highly active and stable nanogold catalyst is urgently desired but still remains a big challenge.On the basis of our previous works,considering the effect of the strong metal-support interaction（SMSI）,a new type of Au-Cu/CeO₂/Al₂O₃ catalyst was synthesized.The obtained catalyst is not only highly active for the CO-PROX reaction,but also shows a 100%CO conversion in the temperature range of 80-110 ℃.The characterization results indicated that increased activity can be ascribed to the formation of oxygen vacancy,which suggested that the introduction of ceria could greatly enhance the Au-support interaction and reducibility of Au-Cu/CeO₂/Al₂O₃ catalyst.更多还原