上海交通大学金放鸣团队报道了在温和条件下用Pd调制的Co基催化剂，选择性裂解葡萄糖分子以实现高效的CO₂还原。相关研究成果于2024年7月15日发表于国际顶尖学术期刊《科学通报》。

将陆地生物质作为还原剂与海底型水热环境相结合以减少二氧化碳，是可持续循环碳的新型能源生产系统的一种可能方法。然而，提高生物质的还原能力是这种潜在方法的主要局限性。

该文中，研究证明，掺杂少量Pd的Co通过从碳水化合物中，选择性地产生活性中间体来增强CO₂的还原。该催化反应利用葡萄糖作为还原剂，在225°C的中等温度下，以接近100%的选择性实现高的甲酸盐生产效率（458.6 g kg^–1），其中Pd1Co20/γ-Al₂O₃的含量为7.5 wt%。掺杂剂Pd对催化Co表面电子结构的调节，在促进葡萄糖的C-C键断裂和CO₂还原的氢转移方面起着关键作用。

研究结果表明，生物质可以作为减少二氧化碳的氢源，并为二氧化碳在可持续工业应用中的潜在利用提供了见解。

附：英文原文

Title: Selective scission of glucose molecule by a Pd-modulated Co-based catalyst for efficient CO2 reduction under mild conditions

Author: Peidong Zhu，Jiacong Li ，Yang Yang，Heng Zhong，Fangming Jin

Issue&Volume: 2024/07/15

Abstract: Combining terrestrial biomass as the reductant with submarine-type hydrothermal environments for CO2 reduction represents a possible approach for novel energy production systems that sustainably circulate carbon. However, increasing the reductive power of biomass is the main limitation of this potential method. Herein, we demonstrate that Co-doped with small amounts of Pd enhances the reduction of CO2 by selectively producing an active intermediate from carbohydrates. This catalytic reaction utilized glucose as a reductant to achieve high formate production efficiency (458.6 g kg–1) with nearly 100% selectivity with 7.5 wt% Pd1Co20/γ–Al2O3 at a moderate temperature of 225 °C. The regulation of the electronic structure of the catalytic Co surface by the dopant Pd plays a key role in promoting the C–C bond cleavage of glucose and hydrogen transfer for CO2 reduction. The findings presented here indicate that biomass can serve as the hydrogen source for CO2 reduction and provide insight into the potential utilization of CO2 in sustainable industrial applications.

DOI: 10.1016/j.scib.2024.07.020

Source: https://www.sciencedirect.com/science/article/abs/pii/S2095927324004997