Pd nanocatalysts engineering for direct oxidation methane-to-methanol with 99.7% selectivity
Abstract Pd catalysts demonstrate remarkable activity and selectivity for the direct oxidation methane-to-methanol (DOMM) under mild conditions. However, understanding the structure–performance relationship is challenging because Pd catalysts used in existing studies have complex polycrystalline str...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-08-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-63067-0 |
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| Summary: | Abstract Pd catalysts demonstrate remarkable activity and selectivity for the direct oxidation methane-to-methanol (DOMM) under mild conditions. However, understanding the structure–performance relationship is challenging because Pd catalysts used in existing studies have complex polycrystalline structures. In this work, well-defined Pd nanocrystals with controlled morphologies are synthesized and used as model systems to investigate the origins of the observed structure-activity differences. Our findings indicate that DOMM activity is primarily governed by crystal facet type rather than nanocrystal size. The lower d-band center of the Pd {111} facet weakens the adsorption strength of critical intermediates, including *O2 and *OH species, promoting H2O2 generation and CH3OH formation, respectively. Consequently, {111}-dominated octahedral Pd nanocrystals achieve an exceptional CH3OH yield of 201.8 mmol·gPd −1·h−1, three times higher than that of their {100}-dominated hexahedral counterparts. These results provide key insights into the structure-dependent behavior of Pd catalysts and pave the way for designing high-performance catalysts for DOMM. |
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| ISSN: | 2041-1723 |