Deng Chaofan, Cai Chun
School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, P. R. China.
ACS Omega. 2025 Aug 13;10(33):37916-37926. doi: 10.1021/acsomega.5c05031. eCollection 2025 Aug 26.
Pd-Cu bimetallic catalysts were successfully synthesized for the dehydrogenation of Bisphenol Z (BPZ) by an impregnation-reduction method. The obtained catalyst was studied by XRD, HRTEM, XPS, BET, and NH-TPD techniques and effectively applied in the highly selective cleavage dehydrogenation of BPZ to give PPP > 99% yield at 270 °C and atmospheric pressure in the solvent-free condition. It was demonstrated that the "synergistic effect" of the bimetallic catalysts could effectively promote the cleavage dehydrogenation reaction. Pd species served as the primary active sites for the adsorption and dissociation of H* and the activation of C-H bonds, while the introduced Cu species accelerated the breaking process of the C-H bond. This catalyst demonstrated remarkable stability and could be reused over ten cycles without obvious decrease both in yield and selectivity. The likely reaction pathway was outlined to elucidate the cleavage dehydrogenation mechanism according to experimental results.
通过浸渍还原法成功合成了用于双酚Z（BPZ）脱氢反应的钯-铜双金属催化剂。采用XRD、HRTEM、XPS、BET和NH-TPD技术对所得催化剂进行了研究，并将其有效地应用于BPZ的高选择性裂解脱氢反应中，在270℃和常压的无溶剂条件下，产率>99%。结果表明，双金属催化剂的“协同效应”能有效促进裂解脱氢反应。钯物种作为H*吸附和解离以及C-H键活化的主要活性位点，而引入的铜物种加速了C-H键的断裂过程。该催化剂表现出显著的稳定性，可重复使用十次以上，产率和选择性均无明显下降。根据实验结果概述了可能的反应途径，以阐明裂解脱氢机理。
