The catalytic transformation of renewable biomass oil (mainly comprising fatty acids and triglycerides) into high-value alkanes is a versatile technique, and Ni-based catalysts are considered to be the most suitable substitutes for precious metals. Ni nanoparticles supported on CeO₂ carriers, prepared by hydrothermal synthesis (Ni/H-CeO₂) with abundant oxygen vacancies, exhibited superior catalytic activity compared to precious metal catalysts. For the hydrodeoxygenation of palmitic acid, the Ni/H-CeO₂ catalyst converted palmitic acid into pentadecane with a 94.8% selectivity under mild reaction conditions. The outstanding catalytic performance of Ni/H-CeO₂ can be attributed to the synergistic effect between the Ni nanoparticles for activating hydrogen and the abundant oxygen vacancies for adsorbing oxygen from palmitic acid. The abundant oxygen vacancies of Ni/H-CeO₂ improved the interaction between the Ni metal and CeO₂ support, as confirmed by density functional theory calculations. Therefore, the abundant oxygen vacancies were more conducive to the dispersion of Ni, resulting in the formation of Ni nanoparticles, which enhanced the potential for hydrogen activation due to the increased number of exposed Ni and electronic effects. The high pentadecane selectivity was governed by small Ni nanoparticles. This study provides a novel strategy to obtain an efficient hydrodeoxygenation catalyst for converting biomass oil into biofuel.

将可再生生物质油（主要由脂肪酸和甘油三酯组成）催化转化为高价值烷烃是一项用途广泛的技术，镍基催化剂被认为是最合适的贵金属替代品。与贵金属催化剂相比，通过水热合成（Ni/H-CeO 2 ）制备的_具有丰富氧空位的CeO 2 载体负载的Ni纳米颗粒表现出优异的催化活性_。对于棕榈酸的加氢脱氧，Ni/H-CeO ₂催化剂在温和的反应条件下将棕榈酸转化为十五烷，选择性为 94.8%。_{Ni/H-CeO 2}优异的催化性能这可以归因于用于激活氢的 Ni 纳米粒子与用于从棕榈酸中吸附氧的丰富氧空位之间的协同效应。_{Ni/H-CeO 2}丰富的氧空位改善了Ni金属和CeO ₂载体之间的相互作用，正如密度泛函理论计算所证实的那样。因此，丰富的氧空位更有利于Ni的分散，导致Ni纳米粒子的形成，由于暴露的Ni数量增加和电子效应，增强了氢活化的潜力。高十五烷选择性由小的 Ni 纳米粒子控制。本研究提供了一种新的策略来获得用于将生物质油转化为生物燃料的高效加氢脱氧催化剂。