当前位置: X-MOL 学术ACS Catal. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Interplay of Pt and Crystal Facets of TiO2: CO Oxidation Activity and Operando XAS/DRIFTS Studies
ACS Catalysis ( IF 11.3 ) Pub Date : 2016-10-19 00:00:00 , DOI: 10.1021/acscatal.6b01509
Ying Zhou 1, 2 , Dmitry E. Doronkin 1, 3 , Menglu Chen 2 , Shiqian Wei 2 , Jan-Dierk Grunwaldt 1, 3
Affiliation  

In this work, the influence of the terminating or exposed crystal planes of anatase TiO2 support on the catalytic activity of Pt/TiO2 catalysts is reported. Strong effects were observed when using CO oxidation as a probe reaction. The CO oxidation activity over these catalysts ranks in the following order: Pt/TiO2-{101} > Pt/TiO2-{100} > Pt/TiO2-{001}. The combination of in situ X-ray absorption spectroscopy, X-ray emission spectroscopy, diffuse reflectance infrared Fourier transform spectroscopy, and density functional theory calculations unravelled a strong interaction between platinum particles and different dominating facets of anatase. The catalytic activity of the Pt/TiO2 catalysts can be correlated with the spectroscopic/structural results. Compared to {001} facets, the {100} and {101} facets of TiO2 can stabilize active highly dispersed Pt species and avoid sintering Pt particles. This finding provides some important insights into understanding the metal–support interfacial interactions of Pt/TiO2 catalysts for tuning their catalytic performance.

中文翻译:

Pt和TiO 2晶面的相互作用:CO氧化活性和Operando XAS / DRIFTS研究

在这项工作中,报道了锐钛矿型TiO 2载体的终止或暴露的晶面对Pt / TiO 2催化剂的催化活性的影响。当使用CO氧化作为探针反应时,观察到了强大的效果。这些催化剂上的CO氧化活性按以下顺序排列:Pt / TiO 2- {101}> Pt / TiO 2- {100}> Pt / TiO 2- {001}。的组合原位X射线吸收光谱,X射线发射光谱,漫反射傅里叶变换红外光谱,和密度泛函理论计算揭开铂颗粒和锐钛矿的不同支配面之间存在强烈的相互作用。Pt / TiO的催化活性2种催化剂可以与光谱/结构结果相关。与{001}面相比,TiO 2的{100}和{101}面可以稳定活性高分散的Pt物质,并避免烧结Pt颗粒。这一发现为理解Pt / TiO 2催化剂的金属-载体界面相互作用以调节其催化性能提供了一些重要的见识。
更新日期:2016-10-19
down
wechat
bug