Systematic heterogeneous design of Cu catalysts for CO2 electroreduction towards highly value-added products

由于本项目旨在通过使用多孔材料作为载体材料来提高二氧化碳总转化率的策略，从而实现高效的二氧化碳还原电催化剂。到目前为止，我们已经建立了以Zr-MOF为载体的高CO2转化率的铋催化剂来生产甲酸。具体来说，在我们成功地将UIO-66与铋粒子偶联的过程中，我们深入研究了这段时间内提高的原因。拉曼光谱、X射线光电子能谱和傅立叶变换红外光谱分析表明，随着锆位碳酸盐浓度的增加，铋催化剂的CO_2利用率提高，但在稳定性方面仍存在一些问题。由于强碱性条件下的结构演化，随着电解时间的延长，CO2还原电流密度逐渐降低。因此，我们正在继续解决稳定性问题，并明确活动改善的具体原因。

As this project aims to achieve efficient electrocatalysts for CO2 reduction with strategies using porous materials as supporting materials to boost total CO2 conversion. Up to now, we established high CO2 conversion with Zr-MOF support for Bi catalyst to generate formic acid production.In detail, as we successfully coupled UiO-66 with Bi particles, we deeply investigated the reason for the improvement in this research period. According to Raman, XPS and FTIR analysis, carbonate concentration should be increased at Zr site, resulting in higher CO2 utilization for Bi catalysts.However, we still have challenging issues regarding the stability. Due to Zr-MOF's structural evolution under strong alkaline condition, as the electrolysis time goes, CO2-reducing current density is gradually decreased. Thus, we are on-going to solve the stability and make clear the specific reason for improved activity.