基于晶面演变行为的纳米多孔Pt(Au)/C阴极调控不饱和有机物的电催化还原机制研究

In the manufacture process of energy sources and chemical engineering, it has been shown up obvious practical value in electro-catalytic reduction unsaturated organics, such as Cyclohexene, by Water Electrolysis coupling Organics Electro-catalysis Reduction (WE&OER) technology. Today, in the research of nano-porous Pt(Au)/C cathodes structure-performance relationship of WE&OER technology, these is some key scientific problems urgently need to be solved: the regulatory mechanisms about preferred orientation and structural stability of main catalytic phase on cathode surface, the mechanism about selective growth and evolution of exposed crystal face on the cathodes, and the influencing mechanism about nano-porous cathodes enhance double bonds activation of Cyclohexene and depress hydrogen desorption.. According to our fore research results about the synthetic methods of core-shell structure PtCu/CeO2/C electrodes and nanopore structure PtCu/C electrodes, and its structure-performance relationship. So, in our new task, we plan to focus on some research in: establishing the influencing mechanism about regulating the nanopore morphology and evolving the exposed crystal face on nano-porous Pt(Au)/C cathodes, and acquiring the key influencing factors about H+ transfer resistance and electric-adsorption Cyclohexene characteristics on nano-porous Pt(Au)/C cathodes, and setting up the influencing mechanism about the electron pair structure and the active site of principal phase enhance double bonds activation of Cyclohexene and depress hydrogen desorption on nano-porous Pt(Au)/C cathodes.. Our new research results of the task can enrich the theoretical system in structure-performance relationship of nano-porous Pt(Au)/C cathodes, and promote application and development of WE&OER technology in the manufacture process of energy sources and chemical engineering.

在能源、化工领域，采用先进的“水电解-有机物电催化还原耦合”技术还原不饱和有机物（如：环己烯）表现出明显的实用价值。针对耦合技术中Pt(Au)/C阴极构效关系的研究，存在亟待解决的关键科学问题：阴极表面催化主相的择优取向及结构稳定的调控机制、阴极裸露晶面的选择生长及演变机制，纳米多孔阴极增强环己烯双键活化且抑制析氢的影响机制。依据项目组前期对合成核壳结构PtCu/CeO2/C与纳米孔结构PtCu/C电极以及电极构效关系的预研结果，本项目拟开展调控纳米孔形态及裸露晶面演变的影响机制研究，影响纳米多孔Pt(Au)/C阴极的H+传质阻力及电吸附环己烯特性的关键因素研究，以及主相的电子对结构与活性位状态对环己烯双键的增强活化及抑制氢脱附的影响机制研究。项目研究结果可充实纳米多孔金属催化电极构效关系的理论体系，促进耦合技术在能源、化工领域的应用发展。

在能源、化工领域，采用先进的“水电解-有机物电催化还原耦合”技术还原不饱和有机物（如：环己烯）表现出明显的实用价值。针对耦合技术中Pt(Au)/C阴极构效关系的研究，存在亟待解决的关键科学问题：阴极表面催化主相的择优取向及结构稳定的调控机制、阴极裸露晶面的选择生长及演变机制，纳米多孔阴极增强环己烯双键活化且抑制析氢的影响机制。依据项目组前期对合成核壳结构PtCu/CeO2/C与纳米孔结构PtCu/C电极以及电极构效关系的预研结果，本项目拟开展调控纳米孔形态及裸露晶面演变的影响机制研究，影响纳米多孔Pt(Au)/C阴极的H+传质阻力及电吸附环己烯特性的关键因素研究，以及主相的电子对结构与活性位状态对环己烯双键的增强活化及抑制氢脱附的影响机制研究。项目研究结果可充实纳米多孔金属催化电极构效关系的理论体系，促进耦合技术在能源、化工领域的应用发展。