MOF‐on‐MOF‐Derived Hollow Co₃O₄/In₂O₃ Nanostructure for Efficient Photocatalytic CO₂ Reduction

Abstract

The photocatalytic transformation of carbon dioxide (CO2) into carbon‐based fuels or chemicals using sustainable solar energy is considered an ideal strategy for simultaneously alleviating the energy shortage and environmental crises. However, owing to the low energy utilization of sunlight and inferior catalytic activity, the conversion efficiency of CO2 photoreduction is far from satisfactory. In this study, a MOF‐derived hollow bimetallic oxide nanomaterial is prepared for the efficient photoreduction of CO2. First, a unique ZIF‐67‐on‐InOF‐1 heterostructure is successfully obtained by growing a secondary Co‐based ZIF‐67 onto the initial InOF‐1 nanorods. The corresponding hollow counterpart has a larger specific surface area after acid etching, and the oxidized bimetallic H‐Co3O4/In2O3 material exhibits abundant heterogeneous interfaces that expose more active sites. The energy band structure of H‐Co3O4/In2O3 corresponds well with the photosensitizer of [Ru(bpy)3]Cl2, which results in a high CO yield of 4828 ± 570 µmol h−1 g−1 and stable activity over a consecutive of six runs, demonstrating adequate photocatalytic performance. This study demonstrates that the rational design of MOF‐on‐MOF heterostructures can completely exploit the synergistic effects between different components, which may be extended to other MOF‐derived nanomaterials as promising catalysts for practical energy conversion and storage.

Metal–organic frameworks on versatile substrates

“…The fabrication of MOFs on porous polymer substrates, mainly focusing on the phase transition interface, is thoroughly researched. 43 Recent studies on MOF substrates include the following: synthesis and methods of different MOF membranes, 44 development in MOF membranes, 45 MOF/substrates for environmental applications, 46,47 MOF membranes for oil–water separation, 48 MOF-mediated three-dimensional (3D) devices, 49 and MOF–cellulose composites. 50 Focusing on recent developments and taking these developments into account since 2019, this review attempts to fill a nearly three-to five-year gap and presents a comprehensive review of MOF/substrate materials, their associated applications, and current constraints.…”

Fabricating freestanding electrocatalyst with bismuth‐iron dual active sites for efficient ammonia synthesis in neutral media

“…18,19 Fe single atoms decorated NC (Fe@NC) exhibited an impressive FE of 56.55% with an NH 3 yield rate of 7.48 μg h −1 mg −1 . 50 Inspired by biological nitrogenase and the exciting results on dual active centers for efficient electro-/photo-catalysis that have been reported, 51,52 we consider combining Bi and Fe to form a novel electrocatalyst with Bi and Fe dual active sites for high-performance NRR. Bismuth ferrites are ternary metal oxides that are liable to achieve excellent electrocatalytic activities and stability due to the strong interaction between electrons and the redox coupling effect between metal cations.…”

Fluorinated Metal–Organic Frameworks with Dual-Functionalized Linkers to Enhance Photocatalytic H2 Evolution and High Water Adsorption

“…Advanced photocatalysts are currently based on materials with a shorter synthesis pathway and less energy consumption. The application of nonprecious metals with considerable stability and a high ability to absorb light and water molecules can lead to the ideal performance of a photocatalytic process. − …”