TiO₂ nanocrystals with controlled facets have been extensively investigated due to their excellent photocatalytic performance in sustainable and green energy field. However, the applications in thermal catalysis without applying UV irradiation are comparably less and the identification of their intrinsic roles, especially the different catalytic behaviors of each crystal facet, remains not fully recognized. In this study, bimetallic AuPd nanoparticles supported on anatase TiO₂ nanosheets exposing {001} facets or TiO₂ nanospindles exposing {101} as a catalyst were prepared by sol-immobilization method and used for solvent-free benzyl alcohol oxidation. The experimental results indicated that the exposed facet of the support has a significant effect on the catalytic performance. AuPd/TiO₂-001 catalyst exhibited a higher benzyl alcohol conversion than that of the AuPd/TiO₂-101. Meanwhile, all the prepared AuPd/TiO₂ catalysts were characterized by XRD, ICP-AES, XPS, BET, TEM, and HRTEM. The results revealed that the higher number of oxygen vacancies in TiO₂-sheets with the exposed {001} facets of higher surface energy could be responsible for the observed enhancement in the catalytic performance of benzyl alcohol oxidation. The present study displays that it is plausible to enhance the catalytic performance for the benzyl alcohol oxidation by tailoring the exposed facet of the TiO₂ as a catalyst support.

 具有可控刻面的TiO ₂纳米晶体由于在可持续和绿色能源领域具有出色的光催化性能而被广泛研究。然而，在没有施加紫外线照射的情况下，在热催化中的应用却相对较少，并且其内在作用的识别，尤其是每个晶面的不同催化行为，仍未得到充分认识。在这项研究中，双金属AuPd纳米颗粒负载在暴露{001}面或TiO _2的锐钛矿型TiO ₂纳米片上用溶胶固定法制备了{101}作为催化剂的纳米纺锤体，用于无溶剂苯甲醇的氧化。实验结果表明，载体的暴露面对催化性能具有显着影响。AuPd / TiO ₂ -001催化剂显示出比AuPd / TiO ₂ -101更高的苯甲醇转化率。同时，用XRD，ICP-AES，XPS，BET，TEM和HRTEM对所有制备的AuPd / TiO ₂催化剂进行了表征。结果表明，TiO _2中的氧空位数量更高暴露的具有较高表面能的{001}面的纸可能是所观察到的苄醇氧化催化性能增强的原因。本研究表明，通过调整TiO ₂的裸露面作为催化剂载体，可以增强苄醇氧化的催化性能。