TY - EJOUR DO - 10.1002/cctc.201301043 AB - The structure sensitivity of acetylene hydrogenation was studied over size-controlled cubic and octahedral Pd nanocrystals (NCs) supported on ZnO and SiO2. Acetylene hydrogenation was found to be structure sensitive [with Pd(111) in octahedra being more active than Pd(100) in cubes]. However, the response was found to vary depending on the redox properties of the support. The catalytically active and selective palladium carbide (PdCx) phase was readily formed on the SiO2-supported Pd NCs (much faster on cubes than on octahedra), whereas a markedly less active PdZn phase was preferentially formed on the ZnO-supported Pd nanocrystals. Here we show that the structure sensitivity of a chemical reaction is a complex phenomenon that originates from the reconstruction of the active phase in response to the reactive environment, which is ultimately determined by the support used. T1 - Size and Shape-controlled Pd Nanocrystals on ZnO and SiO2: When the Nature of the Support Determines the Active Phase IS - 3 DA - 2014 AU - Crespo-Quesada, Micaela AU - Yoon, Songhak AU - Jin, Mingshang AU - Xia, Younan AU - Weidenkaff, Anke AU - Kiwi-Minsker, Lioubov JF - Chemcatchem SP - 767-771 VL - 6 EP - 767-771 PB - Wiley-VCH Verlag Berlin PP - Weinheim ID - 199686 KW - acetylene KW - carbide KW - hydrogenation KW - nanocrystals KW - palladium KW - structure sensitivity KW - support effects SN - 1867-3880 ER -