Formation of iron oxide/Pd hybrid nanostructures with enhanced peroxidase-like activity and catalytic reduction of 4-nitrophenol

ABSTRACT

Iron oxide/Pd hybrid nanostructures with controllable Pd loading from 0.05 to 1.0 (calculated as Pd/Fe molar ratio) have been synthesized by chemical reduction of Pd²⁺ on iron oxide particles. The combination of iron oxide and Pd exhibits enhanced peroxidase-like activity and catalytic activity toward reduction of 4-nitrophenol. The catalytic enhancements were found to be dependent on the Pd loading amount as well as the synergistic effect between iron oxide and Pd. These results suggest that iron oxide with unique surface chemical state can be an active supporter and suggest an effective way to design superior hybrid nanostructures for catalytic applications.

KEYWORDS:

• Iron oxide/Pd
• hybrid nanostructures
• catalytic
• peroxidase-like
• 4-nitrophenol reduction

Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 21303153 and 61504117), the Program for Science & Technology Innovation Talents in Universities of Henan Province (174100510014), Plan for Scientific Innovation Talent of Henan Province and Basic and Advanced Technology Research Project in Henan Province (162300410047). This work was also supported by a regulatory science grant under the FDA Nanotechnology CORES Program. This paper is not an official US FDA guidance or policy statement. No official support or endorsement by the US FDA is intended or should be inferred.