The direct hydrogenation of CO₂ using H₂ gas is a one-stone-two-birds route to produce highly value-added hydrocarbon compounds and to lower the CO₂ level in the atmosphere. However, the transformation of CO₂ and H₂ into hydrocarbons has always been a great challenge while ensuring both the activity and selectivity over abundant-element-based nanocatalysts. In this work, we designed a Schottky heterojunction composed of electron-rich MoC nanoparticles embedded inside an optimized nitrogen-doped carbon support ([email protected]) as the first example of noble-metal-free heterogeneous catalysts to boost the activity of and specific selectivity for CO₂ hydrogenation to formic acid (FA) in liquid phase under mild conditions (2 MPa pressure and 70 °C). The [email protected] catalyst with a high turnover frequency (TOF) of 8.20 mol_FA mol_MoC⁻¹ h⁻¹ at 140 °C and an excellent reusability are more favorable for real applications.

使用H ₂气体直接氢化CO ₂是一种一石二鸟的途径，可生产高附加值的碳氢化合物并降低大气中的CO ₂水平。然而，将CO ₂和H ₂转化为碳氢化合物一直是一个巨大的挑战，同时要确保基于丰富元素的纳米催化剂的活性和选择性。在这项工作中，我们设计了一个肖特基异质结，该异质结由嵌入优化的氮掺杂碳载体（[电子邮件保护]）内的富电子 MoC 纳米颗粒组成，作为无贵金属多相催化剂的第一个例子，以提高活性和特异性CO ₂的选择性在温和条件下（2 MPa 压力和 70 °C）在液相中加氢生成甲酸 (FA)。_{[email protected] 催化剂在 140 °C 下具有 8.20 mol FA} mol _MoC ^-1 h ^-1的高转换频率 (TOF)和出色的可重复使用性，更适合实际应用。