Developing non‐noble metal catalysts that can efficiently and selectively hydrogenate arenes remains a significant challenge. In this study, we developed efficient Ni catalysts for the arene hydrogenation based on an organic acid‐regulated impregnation strategy. These easily accessible Ni catalysts demonstrated exceptional efficiency, selectivity, reusability, and good substrate compatibility. The influence of carbon chain lengths and side‐chain hydroxyl or amino groups on dicarboxylic acids used in the catalyst preparation was comprehensively investigated. Characterizations and kinetic studies demonstrated the influence of organic acids on the size of Ni nanoparticles, the proportion of metallic nickel, and the strength of surface acidity. These factors influenced the activation of arene and hydrogen, thereby affecting the hydrogenative activity. Notably, hydroxyapatite‐supported Ni catalyst, assisted by tartaric acid (Ni‐TA/HAP) with an appropriate tartaric acid‐to‐nickel ratio, resulted in relatively smaller Ni nanoparticles, an increased proportion of Ni0, and more acidic sites, thereby exhibiting the best hydrogenation performance.

中文翻译：

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有机酸辅助制备羟基磷灰石负载镍芳烃加氢催化剂

开发能够有效、选择性氢化芳烃的非贵金属催化剂仍然是一个重大挑战。在这项研究中，我们基于有机酸调节的浸渍策略开发了用于芳烃加氢的高效镍催化剂。这些易于获得的镍催化剂表现出卓越的效率、选择性、可重复使用性和良好的底物兼容性。综合研究了碳链长度和侧链羟基或氨基对催化剂制备中使用的二羧酸的影响。表征和动力学研究证明了有机酸对镍纳米粒子的尺寸、金属镍的比例以及表面酸性强度的影响。这些因素影响芳烃和氢的活化，从而影响加氢活性。值得注意的是，羟基磷灰石负载的镍催化剂，在酒石酸（Ni-TA/HAP）的辅助下，具有适当的酒石酸与镍的比例，产生相对较小的镍纳米粒子，增加了Ni0的比例，并具有更多的酸性位点，从而表现出加氢性能最佳。