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The facile one-step knitting strategy was applied to preparing copper porphyrin based heterogeneous catalysts for sustainable and highly efficient styrene oxidation. [Display omitted] • A facile one-step knitting strategy to synthesize copper porphyrin based polymers was adopted. • Systematic exploration of two comparable polymers (SC-Cu and FC-Cu) for styrene oxidation. • These heterogeneous POFs catalysts could be fairly easy to obtain. • The SC-Cu catalyst makes selectively high production of styrene oxide possible. Porous organic frameworks (POFs) catalysts with a combination of the well-developed porosity and highly dispersed of active sites hold promise for boosting catalyst activity and selectivity. Among their many synthetic methods, one-step knitting strategies have gained superiority and potential for development. Here, two copper porphyrin based microporous polymers (SC-Cu and FC-Cu) were directly synthesized through Scholl coupling reaction and Friedel-Crafts alkylation reaction respectively, which possess high surface area and efficient catalytic performance for styrene oxidation. Moreover, the hierarchical pores of SC-Cu gave it a unique catalytic performance with various olefins with excellent conversion rate. The insight achieved by this systematic analysis will contribute to the rational design of other POFs catalysts and widening extent of applications. [ABSTRACT FROM AUTHOR]

• Highly Efficient electrocatalyst was constructed by using template-assisted approach. • Fe nanocrystals, high content of active sites and porous structure contributed to the remarkable ORR performance. • It opens up a general way to design of TM, N-decorated 3D porous electrocatalysts. Rational engineering of simple, economical and durable nonprecious metal electrocatalyst with excellent oxygen reduction reaction (ORR) activity is crucial for the electrochemical energy conversion devices, such as metal-air batteries and fuel cells. Here, we developed a highly efficient ORR electrocatalyst with rich and well-dispersed Fe-N x active sites and iron nanocrystals decorated three dimension (3D) porous carbonaceous matrix by a rational designed carbonaceous spheres templated strategy. The fabricated electrocatalyst exhibits outstanding ORR activity with onset potential of 1.0 V and half-wave potential of 0.90 V versus reversible hydrogen electrode in alkaline media, which is much better than benchmark Pt/C. In addition, it presents particularly better performance in terms of superior stability and excellent methanol tolerance capacity. Experimental studies display that the remarkable ORR activity primarily originates from the synergetic effect of rich Fe-N x active sites, sufficient carbon encapsulated metallic iron nanocrystals and desired meso/microporous structure. What worth to point out is that the facile synthetic technique can be extended to fabricate other low cost highly active transition metal-N-carbon scaffolds ORR electrocatalysts. [ABSTRACT FROM AUTHOR]