A 3 wt% Ir/SiC catalyst prepared by the wet impregnation method showed excellent catalytic activity and stability for the aqueous hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) in a batch reactor system. LA was completely converted to GVL at 50 °C and 0.2 MPa of H₂ pressure with 100% selectivity and a high turnover frequency (TOF) of 333 h⁻¹. The high activity of Ir/SiC catalyst could be related to the Schottky-type contact between Ir and SiC solid phases, which promotes electron transfer between support and metal. Due to the excellent acid resistance of SiC support, the Ir/SiC catalyst showed high catalytic stability and nearly no loss of activity after 5 consecutive catalytic operation cycles.

通过湿式浸渍法制备的3 wt％Ir / SiC催化剂对于间歇反应器系统中的乙酰丙酸（LA）水溶液加氢成γ-戊内酯（GVL）表现出优异的催化活性和稳定性。LA在50°C和0.2 MPa的H ₂压力下以100％的选择性和333 h ^-1的高周转频率（TOF）完全转化为GVL 。Ir / SiC催化剂的高活性可能与Ir和SiC固相之间的肖特基接触有关，这促进了载体与金属之间的电子转移。由于SiC载体具有出色的耐酸性，因此Ir / SiC催化剂在连续5次催化操作循环后显示出较高的催化稳定性，几乎没有活性损失。