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

Liquid organic hydrogen carriers have attracted significant attention for hydrogen storage and transportation 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 PdCoO x -based bimetallic oxide catalyst was prepared and applied for the low-temperature dehydrogenation of dodecahydro- N -ethylcarbazole (12H-NECZ) to produce H 2 , utilizing the following advantages: (1) the activity of Pd was enhanced by introducing Co to form a PdCoO x bimetallic oxide site; (2) the electronic state of the catalyst was tuned based on the interfacial effect between the PdCoO x and Zr-C 3 N 4 supports. Thus, PdCo bimetallic oxide formation improved the electronic transfer rate and the interaction between the support and PdCoO x , thereby enhancing the catalytic dehydrogenation activity. Consequently, 12H-NECZ was completely dehydrogenated with 95.6 % selectivity at 140 °C for 8 h, with only 2.63 wt% Pd loading.