金的尺寸效应及金与载体间相互作用对甲醛室温氧化反应的调控机制

To solve the bottleneck problem of the supported gold catalysts applied in the indoor formaldehyde removal, a low cost and high stability supported gold catalyst was proposed in the present project. The gold particle size played important roles in the initial activity on the HCHO oxidation at room temperature, while the property of support has more significant effect on the stability of the supported Au catalyst than it on the initial activity. Following on the above results, we propose to illuminate the structure-properties of Au catalyst and the interaction between Au and support for HCHO oxidation at room temperature. Through the study on the synthesis of size controllable gold catalyst and the interaction between Au and supports, the catalysis mechanism for formaldehyde oxidation at room temperature over supported gold catalyst would be clarified. Based on the above-mentioned study, the essentials of supported Au catalysts for the formaldehyde oxidation will be illustrated, which will be very helpful for designing and modifying the effective supported gold catalysts for indoor formaldehyde removal under real condition.

针对金催化剂实际应用于室温甲醛氧化反应的瓶颈问题，本项目提出构建低成本、高稳定性负载金催化剂。通过可控制备原子级及纳米级分散的金催化剂，研究纳米金的尺寸效应对甲醛室温氧化反应的调控机制。研究载体对金的分散作用，包括载体对金的几何形貌及电子结构的调变，揭示金与载体的相互作用对室温甲醛氧化反应初活性和稳定性的影响机制。研究粒径可控的金催化剂的制备方法，通过对载体的调变，探究载体表面氧（羟基等）物种、载体形貌等因素对金的分散和锚定机制。通过上述研究获得具有明确应用前景的低负载量、高稳定性室温氧化甲醛的金催化剂，为金催化剂实际应用于室内甲醛净化提供可行途径。

针对金催化剂实际应用于室温催化氧化甲醛反应的稳定性差及成本高的瓶颈问题，本项目提出了构建低成本、高稳定性负载金催化剂：通过可控制备原子级及纳米级分散的金催化剂，研究负载金的尺寸效应对甲醛室温氧化反应初活性的影响；通过对比研究氧化还原性和“惰性”氧化物载体负载金催化剂中金与载体的相互作用，揭示金与载体的相互作用对室温甲醛氧化反应稳定性的影响机制。通过上述过程，解决负载金催化剂在室温氧化甲醛过程中的稳定性差及负载量高等问题。构建适合于室温催化氧化甲醛的低含量、高活性负载金催化剂，研究甲醛在负载金催化剂上的氧化反应机理，揭示载体表面氧（羟基等）物种、载体结构等对负载金的分散和锚定机制。在上述研究基础上，提供适合于实际应用的低负载量、高稳定性室温氧化甲醛的金催化剂。