Construction of stabilized bulk-nano interfaces for highly promoted inverse CeO<sub>2</sub>/Cu catalyst.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 31375672.
- Also identified by DOI 10.1038/s41467-019-11407-2 and PMC identifier 6677889.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
As the water-gas shift (WGS) reaction serves as a crucial industrial process, strategies for developing robust WGS catalysts are highly desiderated. Here we report the construction of stabilized bulk-nano interfaces to fabricate highly efficient copper-ceria catalyst for the WGS reaction. With an in-situ structural transformation, small CeO<sub>2</sub> nanoparticles (2-3 nm) are stabilized on bulk Cu to form abundant CeO<sub>2</sub>-Cu interfaces, which maintain well-dispersed under reaction conditions. This inverse CeO<sub>2</sub>/Cu catalyst shows excellent WGS performances, of which the activity is 5 times higher than other reported Cu catalysts. Long-term stability is also very solid under harsh conditions. Mechanistic study illustrates that for the inverse CeO<sub>2</sub>/Cu catalyst, superb capability of H<sub>2</sub>O dissociation and CO oxidation facilitates WGS process via the combination of associative and redox mechanisms. This work paves a way to fabricate robust catalysts by combining the advantages of bulk and nano-sized catalysts. Catalysts with such inverse configurations show great potential in practical WGS applications.