The adsorption and delivery of reactants to active sites are the first two steps of catalytic reactions, however, which receive less attention compared with the design of highly active sites. Herein, we provide an improvement of the two crucial steps by designing perovskite oxides-carbon composites (LaFeO₃_N) for catalytic transfer hydrogenation (CTH) of furfural to furfuryl alcohol. The principle is to ensure that the reactants can be timely supplied to the active sites for reaction. Indeed, the reaction rate over LaFeO₃_N increases tremendously to 5.17 mmol g⁻¹ h⁻¹ that is 6 times higher than that over LaFeO₃_A (0.81 mmol g⁻¹ h⁻¹) without carbon material. The results suggest that LaFeO₃_N can improve the migration of reactants from solution to LaFeO₃ active sites due to the presence of carbon, which has the ability to absorb and deliver the reactants. Effects of carbon content and carbon texture on the reaction are fully investigated. The current strategy of improving the catalytic performances of perovskite oxides can be easily applied to other catalytic systems with low surface area.

反应物向活性位的吸附和输送是催化反应的前两个步骤，但是与高活性位的设计相比，它们受到的关注较少。本文中，我们通过设计钙钛矿型氧化物-碳复合材料（LaFeO ₃ _N）用于糠醛到糠醇的催化转移氢化（CTH），提供了两个关键步骤的改进。原理是确保可以将反应物及时提供给活性部位进行反应。实际上，在LaFeO ₃ _N上的反应速率极大地增加到5.17 mmol g ^-1  h ^-1，这是在LaFeO ₃ _A上的反应速率（0.81 mmol g ^-1  h ^-1）的6倍。）不含碳材料。结果表明，由于碳的存在，LaFeO ₃ _N可以改善反应物从溶液到LaFeO ₃活性位的迁移，碳具有吸收和输送反应物的能力。充分研究了碳含量和碳质地对反应的影响。当前改善钙钛矿氧化物的催化性能的策略可以容易地应用于具有低表面积的其他催化体系。