Preparation of MOF Film/Aerogel Composite Catalysts via Substrate‐Seeding Secondary‐Growth for the Oxygen Evolution Reaction and CO₂ Cycloaddition

Abstract

Substrate‐supported metal–organic frameworks (MOFs) films are desired to realize their potential in practical applications. Herein, a novel substrate‐seeding secondary‐growth strategy is developed to prepare composites of uniform MOFs films on aerogel walls. Briefly, the organic ligand is “pre‐seeded” onto the aerogel walls, and then a small amount of metal‐ion solution is sprayed onto the prepared aerogel. The sprayed solution diffuses along the aerogel walls to form a continuous thin layer, which confines the nucleation reaction, promoting the formation of uniform MOFs films on the aerogel walls. The whole process is simple in operation, highly efficient, and eco‐friendly. The resulting hierarchical MOFs/aerogel composites have abundant accessible active sites and enable excellent mass transfer, which endows the composite with outstanding catalytic activity and stability in both liquid‐phase CO2 cycloaddition and electrochemical oxygen evolution reaction (OER) process.

Synthesis of FeNiCo Ternary Hydroxides through Green Grinding Method with Metal‐Organic Frameworks as Precursors for Oxygen Evolution Reaction

“…Furthermore, to further explore the intrinsic catalytic activity of catalytic electrode, the electrochemically active surface area (ECSA) was investigated, which can be estimated by the electrochemical double‐layer capacitance ( C dl ) [50] . The C dl , proportional to ECSA, was measured by CV in a non‐faradaic region.…”

Atomically Dispersed High‐Density Al–N4 Sites in Porous Carbon for Efficient Photodriven CO2 Cycloaddition

“…In addition to rational construction of catalysts, injecting heat into the reaction system can effectively improve the catalytic efficiency of CO 2 cycloaddition reaction. [ 49–52 ] To meet the required energy and environmental demands, it is promising to directly utilize solar energy instead of heat to drive this reaction. As an important class of photothermal conversion agents, carbon‐based materials with wide spectral absorption can effectively harvest solar energy and convert it into heat via thermal radiation.…”

A Tandem Electrocatalysis of Sulfur Reduction by Bimetal 2D MOFs

“…The 2D MOF is an ideal material platform for catalyst exploring, owing to rapid mass/electron transport along the 2D sheets. [23][24][25][26] The extremely high percentages of exposed catalytic active surfaces and coordinatively unsaturated metal sites could also ensure high catalytic activity. [27][28][29] Most importantly, the metal center can be tailored from single-metal to bimetals, which is critical to evaluate the catalytic activities among different metal centers within one structure.…”