非法拉第过程促进纳米钯低温催化氧化低浓度甲烷的基础研究

甲烷（CH4）催化氧化是控制煤矿通风瓦斯和发动机尾气中低浓度CH4排放的主要方法，提高CH4氧化催化剂的低温活性是催化燃烧领域需要攻克的难题。本项目采用电场诱发的非法拉第过程增强纳米钯（Pd）基催化剂低温催化氧化CH4的活性，提出了解决低浓度CH4低温氧化这一难题的新思路，并围绕相关科学问题开展研究，主要研究内容包括：（1）探究施加电场条件下Pd基催化剂中非法拉第过程的产生机制；（2）探究非法拉第过程影响Pd基催化剂低温催化氧化CH4的机制；（3）探索非法拉第过程作用下Pd基催化剂结构对CH4低温催化氧化的影响规律，建立非法拉第过程驱动条件下低浓度CH4低温氧化催化剂的设计原则。本项目研究将为开发高效的低浓度CH4低温催化氧化技术提供理论基础。

Catalytic oxidation of methane (CH4) is the primary method for controlling the low-concentration CH4 emission from the ventilation-air-methane of coal mines and the exhaust of engines. So far, promoting low-temperature catalytic oxidation of low-concentration methane is still one of the challenges in catalytic combustion. Here we put forward a new idea for low-temperature catalytic oxidation of low-concentration CH4, that is using the Non-Faradaic process induced by electric field to enhance the catalytic oxidation of CH4 over nanosized palladium at low temperature. In this proposal , the scientific issues in Non-Faradaic process promoting catalytic oxidation of CH4 over nanosized palladium catalysts will be stated by carrying out the following tasks: (1) to explore the mechanisms of Non-Faradaic process caused by applying electric field to Pd-based catalysts, and (2) to explore the mechanisms of Non-Faradaic process affecting the low-temperature catalytic oxidation of CH4 over Pd-based catalysts, and （3）to study the mechanisms of catalyst structure affecting the low-temperature catalytic oxidation of CH4 over Pd-based catalysts with Non-Faradaic process, and to establish the design principles of Pd-based catalysts used for low-temperature catalytic oxidation of low-concentration CH4 enhanced by Non-Faradaic process. The scientific merit of the research works proposed in this proposal is to provide fundamental basis for developing high-performance catalysts for low-temperature catalytic oxidation of low-concentration methane.