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Due to consequent non‐renewable resource consumption and environmental pollution,the renewable hydrogen energy has been a new energy candidate. But the sluggish kinetics of oxygen evolution reaction (OER) still hampersthe hydrogen production by water electrolysis. So, to design and synthesize an efficient OER catalyst for electrochemical conversion technologiesstill keeps challenge. Herein, an ideal precursor of bimetallic porphyrinicMOF (Co–CuTCPP)/reduced graphene oxide (Co–CuTCPP/rGO) composite has been fabricated by an ultrathin porphyrinic MOF (Co–CuTCPP) nanosheet loaded onto graphene oxide (GO)via hydrothermal process. Owing to synergetic effect of the rGOand bimetallic porphyrin MOF scaly structure, the optimized Co–CuTCPP/rGO‐10 catalyst exhibited high electrocatalytic activity with a low overpotential of 396 mV at 10 mA cm−2 and a Tafel slope of 58 mV dec−1, and had good stabilityin alkaline conditions. So, the lowcost, stable, and heterogeneous electrocatalyst might be a promising candidate for the OER devices in alkaline conditions without requirement of pyrolysis process.

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Recently, visible‐light response and high–efficient photocatalysis for polycyclic organic pollutants of cancer risk has attracted great attention. However, the efficient control and heterojunction fabrication of nanocomposite catalysts for enhanced separation and transfer of interfacial charges remains challenging. Herein, a ternary heterojunction composite photocatalyst (HTTC) was fabricated by utilizing the ultrathin layered titanium dioxide (TiO2) nanostructures, with photocatalytic reactive facets (A101 and R101) prepared from the commercially available TiO2, coating onto outside surface of multi‐walled carbon nanotubes (CNTs) with chemical connection of Ti‐O=C and Ti‐O−C bond, and then the single layer H2TCPP molecules chemically coated onto outside surface of ultrathin layered TiO2 nanostructures with formation of Ti−O‐C=O chemical bond by layer‐by‐layer (LbL) assembly. The interface layer synergistic effects greatly enhance photocatalytic efficiency for high concentrations solution of polycyclic organic pollutants (methylene blue (MB), Rhodamine B (RhB) and oxytetracycline (OTC) under visible light irradiation, and the photodegradation rates of the photocatalysts for MB (and RhB) were 61 times (and 8 times) higher than that of pure P25. The joint interfacial fabrication strategy and composite engineering affords us a facile guideline for the nanocomposite photocatalysts for environmental protection and ecological conservation.