电催化还原CO2是缓解温室效应和促进CO2资源化利用的有效途径之一，但电催化剂表面反应中间体*CO的弱吸附和耦合作用及析氢竞争反应，导致多碳产物的选择性较低。本项目拟采用孔结构可调的N-掺杂介孔碳限域Oxide-derived Cu (OD-Cu)催化剂，通过提升催化界面局域空间内*CO的浓度，从动力学上促进*CO的吸附，同时利用介孔内较强碱性抑制析氢反应，降低C-C偶联的能垒，协同提高多碳产物的选择性。本项目为解决选择性CO2电催化还原的关键问题，拟开展以下研究：(1)研究催化剂的可控制备，如介孔和OD-Cu的尺寸、结构等；(2)通过调控催化剂的尺寸和表面性质等，研究空间限域影响产物选择性的规律；(3)研究中间体的种类、浓度及吸附，结合理论计算，揭示基于空间限域的CO2电催化还原机制。本项目的研究可构建高多碳产物选择性的CO2电催化还原体系，为CO2的绿色转化和资源化利用提供理论依据。

Electrocatalytic reduction of CO2 is an effective way to mitigate greenhouse effect and promote the resource utilization of CO2. However, poor adsorption and C-C coupling of *CO intermediates and the competing reaction of hydrogen evolution on the surface of electrocatalyst usually result in a low selectivity of products. This project intends to confine oxide-derived Cu (OD-Cu) catalysts in N-doped mesoporous carbon with adjustable pores to improve the selectivity of multi-carbon products. Space confinement of OD-Cu catalysts can increase the concentration of *CO intermediates in the electrocatalytic space, kinetically promoting the adsorption of *CO. Besides, the high alkalinity in N-doped mesoporous carbon can effectively inhibit the competition reactions of hydrogen and lower the C-C coupling activation energy barriers. In order to solve the key problem of selectively catalyzing CO2 electroreduction, this project intends to perform the following research: (1) exploring controllable preparation of catalysts, such as the size and structure of mesoporous and OD-Cu; (2) regulating the size and surface property of catalysts for studying the influence of space confinement on the product selectivity; (3) studying the species, concentration and adsorption of intermediates and revealing the mechanism of electrocatalytic CO2 reduction based on space confinement by combining with theoretical simulation. This project can achieve the goal of constructing a system of electrocatalytic CO2 reduction with a highly selectivity of multi-carbon products, which can provide theoretical basis for green transformation and the resource utilization of CO2.