Abstract
Uniformly dispersed Pd nanoparticles on certain supports exhibit exceptional catalytic performance toward various environmental applications. In this work, ultrafine Pd nanoparticles anchored on CeO2 nanorods were synthesized via an absorption-in situ reduction method. The activity of the CeO2/Pd nanocomposites was systematically investigated toward reduction of 4-nitrophenol (4-NP) and organic dyes including methyl blue, rhodamine B, methyl orange, and Congo red. The results indicated that the CeO2/Pd nanocomposites with different weight ratios of Pd nanoparticles (10.23 wt%, 11.01 wt%, and 14.27 wt%) can almost completely reduce 4-NP with a rate constant of 3.31×10−1, 3.22×10−1, and 2.23×10−1 min−1. Besides, the 10.23 wt% CeO2/Pd nanocomposites exhibit remarkable enhanced catalytic activity toward reduction of organic dyes. The catalysts display ideal stability after being used for three times for the reduction of 4-NP. We believe that our strategy demonstrated here offers insights into the design and fabrication of novel Pd-based nanocomposites for various heterogeneous catalysis applications.










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This study received financial support from the Guangdong Basic and Applied Basic Research Foundation (2020A1515110718) and the National Natural Science Foundation of China (NO. 22106020 and NO.31901750).
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Guodong Dai, Xiaofeng Liu, Xi Chen, and Zhenbang Meng. The first draft of the manuscript was written by Wenxia Wang, and all authors commented on previous versions of the manuscript. Writing—review and editing—was performed by Haibin Yang and Qi He.
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Wang, ., Dai, G., Yang, H. et al. Highly efficient catalytic reduction of 4-nitrophenol and organic dyes by ultrafine palladium nanoparticles anchored on CeO2 nanorods. Environ Sci Pollut Res 29, 8242–8252 (2022). https://doi.org/10.1007/s11356-021-16276-1
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DOI: https://doi.org/10.1007/s11356-021-16276-1

