异核分子
格式化
催化作用
密度泛函理论
化学
Atom(片上系统)
吸附
光化学
分子
无机化学
物理化学
计算化学
有机化学
计算机科学
嵌入式系统
作者
Shengliang Zhai,Sun Hee Jun,Lin Sun,Yang Li,Runqi Tu,Shuchao Jiang,Tie Yu,Hao Wu,Chengcheng Liu,Zhen Li,Dong Zhai,Youyong Li,Guoqing Ren,Wei Deng
标识
DOI:10.1021/acscatal.2c06033
摘要
Single-atom catalysts (SACs) can achieve the maximum metal atom utilization, which exhibit great potential for the chemical transformation of CO2. However, an isolated single active site is less satisfactory for catalyzing multiple molecule reactions involving CO2 hydrogenation. In this work, we propose heteronuclear dual SACs composed of Pd and 3d transition metals supported by covalent triazine frameworks (CTFs). Among these catalysts, the optimized Pd1–Co1/CTF catalyst exhibits up to 84.6% conversion of the captured CO2 from air into formate at 30 °C and 1 bar. The in situ DRIFT characterization and density functional theory calculations reveal that CO2 in air is captured by the Et3N solution as bicarbonate, which is then hydrogenated into formate via the Pd1–Co1 heteronuclear dual single atom with an energy barrier as low as 17.2 kcal/mol. The heteronuclear Pd and Co metal atoms act as the active site for H2 activation and CO2 adsorption, respectively, thus exhibiting enhanced activity for formate synthesis with a synergistic effect. These findings present an insight into the synthesis and application of heteronuclear dual SACs and pave an avenue for conversion of CO2 in the air by heterogeneous catalysts.
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