PdRuS <sub> <i>x</i> </sub> /MoS <sub>2</sub> Nanosheets Decorated B, N-Doped Carbon/MoO <sub>2</sub> Nanotubes for Boosted Peroxidase-like Activity and Reduction of 4-Nitrophenol
Mintong Guo, Weibin Shu, Xiaohong Xu, Jingli Xu, Xue‐Bo Yin, Yeyang Xu, Min Zhang
Abstract
Molybdenum disulfide (MoS 2 ) nanosheets (NSs) face inherent challenges in enzyme-mimetic catalysis, including easy aggregation and limited charge transport efficiency, which greatly restrict catalytic activity and durability. To address these issues, we developed a hierarchical tubular architecture (PdRuS x /MoS 2 /MoO 2 @BNCMTs) through a carbonized organic-polymer-mediated self-sacrificial templating strategy. This innovative approach enables the simultaneous deposition of polymorphic metal sulfides onto MoS 2 substrates, creating heterostructured interfaces that synergistically enhance electron transfer kinetics and catalytic activity. The one-dimensional (1D) nitrogen and boron co-doped carbon tubular framework (BNCMTs) not only prevents MoS 2 restacking but also provides abundant active sites for substrate adsorption and conversion. Experimental investigations revealed that the PdRuS x /MoS 2 heterojunction forms a triphasic catalytic interface with the conductive nitrogen and boron co-doped carbon and metallic MoO 2 matrix, significantly accelerating redox reaction dynamics. This structural optimization manifests in superior catalytic efficiency for 4-nitrophenol (4-NP) reduction and peroxidase-mimicking activity, achieving a H 2 O 2 detection platform. By integrating polymorphic sulfide engineering with conductive carbon support, this work establishes a scalable strategy to bridge heterogeneous catalysis and biomimetic design principles.