TY  - JOUR
AU  - Gong, Ruihan
AU  - Song, He
AU  - Song, Weiguo
AU  - Cao, Changyan
PY  - 2025
TI  - Enhancing the syngas production yield from ethane and CO2 by optimizing the Pd–O–Ce interface
JO  - Nano Research
SN  - 1998-0124
SP  - 94907332
VL  - 18
IS  - 5
AB  - CO2-assisted oxidative dehydrogenation of ethane (CO2-ODHE) and dry reforming of ethane (DRE) have provided a promising way to simultaneously upgrade CO2 and ethane to produce value-added industrial feedstocks, such as syngas (CO and H2) or ethylene. CeO2-supported Pd bimetallic catalysts have been demonstrated to be efficient catalysts for these reactions. In particular, the Pd–O–Ce and Pd–O–Fe (or Pd–O–In) interfaces were verified as the key active sites for producing syngas and ethylene, respectively. However, how to regulate the amount of interface to further enhance the product yield is still a major challenge in this area. In this study, we show that the ratio of the Pd–O–Ce interface can be optimized through the CeO2 nano-island strategy. CeO2 nano-islands with different loadings and sizes are grafted onto the high-surface-area SiO2 and are then used for anchoring PdFen bi-metals, thus leading to the formation of interfaces with different amounts of Pd–O–Ce. The results show that when the Ce loading reaches 15 wt.%, the supported PdFen catalyst has the highest ratio at the Pd–O–Ce interface, resulting in a significant increase in the syngas yield (879.1 μmol·g−1·min−1 for CO and 508.1 μmol·g−1·min−1 for H2 respectively), which is the best among all the reported state-of-the-art catalysts in the literature. At the same time, the ethylene production rate can be maintained at a high level of 172.5 μmol·g−1·min−1.
UR  - https://doi.org/10.26599/NR.2025.94907332
DO  - 10.26599/NR.2025.94907332