Thermal Anchoring Effect Regulates Selective Hydrogenation of 1,4-Butynediol Catalyzed by Ni/SBA-15

The structural characteristics and nickel anchoring capacity were analyzed using XRD, BET, FT-IR, H2-TPR, and ICP-OES. The results demonstrated that crystallization temperature significantly affected the framework order of SBA-15 and the surface anchoring efficiency of Ni ions.

Nickel utilization efficiency increased from 8.4% at 80 °C to 60.49% at 140 °C, but then decreased to 47.25% at 160 °C, indicating an optimal crystallization temperature window. This provides crucial guidance for tailoring high-performance metal-doped molecular sieves. The optimal catalyst exhibited excellent performance in the hydrogenation of 1,4-butynediol (BYD): BYD conversion reached 97.25% with 88.99% selectivity of 1,4-butenediol (BED) within 5 h; and 99.73% conversion with 87.34% selectivity of 1,4-butanediol (BDO) after 20 h reaction.