Promoting Effect of Heterostructured NiO/Ni on Pt Nanocatalysts toward Catalytic Hydrolysis of Ammonia Borane

• DOI: 10.1021/acs.jpclett.9b03080
• Publication Date: 2019-11-14T18:54:41Z
• Authors: Xueying Ren; Hao Lv; Su Yang; Yingying Wang; Jinlong Li; Ren Wei; Dongdong Xu; Ben Liu
• Keywords: Non-blocking I/O; Ammonia Borane; Nanoclusters; Nanomaterial-based catalyst; Chloroplatinic acid

We report that heterostructured NiO/Ni nanoparticles remarkably promote the catalytic H2 production of platinum (Pt) nanoclusters toward hydrolysis ammonia borane (AB). A hybrid nanocatalyst composed ultrasmall Pt nanoclusters, nanoparticles, and a carbon nanotube support (defined as Pt@NiO/Ni-CNT) is fabricated. The resultant Pt@NiO/Ni-CNT highly efficient for room-temperature AB, better than Pt@NiO-CNT Pt@Ni-CNT with NiO or Ni alone, Pt@NiO/Ni without CNT support. Optimal catalyst exhibits good activity high TOF 2665 molH2 molPt-1 min-1 under ambient conditions, overtaking activities previously reported catalysts AB hydrolysis. Catalytic kinetic studies indicate compositional structural features synergistically accelerate oxidative clearage H-OH bond from attacked H2O (the rate-determining step), thus boosting kinetically.