Low-temperature dehydrogenation of dodecahydro-N-ethylcarbazole catalyzed by PdCo bimetallic oxide

Liquid organic hydrogen carriers have attracted significant attention for hydrogen storage and trans-portation and have been extensively investigated. Pd-based noble metal catalysts have been reported as some of the most active catalysts, however, achieving an optimal Pd utilization efficiency and stability remains challenging but significant. Herein, a PdCoOx-based bimetallic oxide catalyst was prepared and applied for the low-temperature dehydrogenation of dodecahydro-N-ethylcarbazole (12H-NECZ) to pro-duce H2, utilizing the following advantages: (1) the activity of Pd was enhanced by introducing Co to form a PdCoOx bimetallic oxide site; (2) the electronic state of the catalyst was tuned based on the interfacial effect between the PdCoOx and Zr-C3N4 supports. Thus, PdCo bimetallic oxide formation improved the electronic transfer rate and the interaction between the support and PdCoOx, thereby enhancing the cat-alytic dehydrogenation activity. Consequently, 12H-NECZ was completely dehydrogenated with 95.6 % selectivity at 140 degrees C for 8 h, with only 2.63 wt% Pd loading.(c) 2023 Elsevier Ltd. All rights reserved.