Pristine Metal–Organic Frameworks and their Composites for Renewable Hydrogen Energy Applications

Abstract

Metal–organic frameworks (MOFs) have emerged as ideal multifunctional platforms for renewable hydrogen (H2) energy applications owing to their tunable chemical compositions and structures and high porosity. Their advanced component species and porous structure contribute greatly to the enhanced activity, electrical conductivity, photo response, charge‐hole separation efficiency, and structural stability of MOF materials, which are promising for practical H2 economy. In this review, we mainly introduce design strategies for the enhancement of electro‐/photochemical behaviors or adsorption performance of porous MOF materials for H2 production, storage, and utilization from compositional perspective. Following these engineering strategies, the correlation between composition and property‐structure‐performance of pristine MOFs and their composite with advanced components is illustrated. Finally, challenges and directions of future development of related MOFs and MOF composites for H2 economy are provided.

Self-supporting metal–organic framework-based hydrogen and oxygen electrocatalysts

“…The prerequisite for pristine MOFs to exhibit excellent catalytic performance under harsh electrochemical conditions is to overcome poor electrical conductivity and chemical stability. 42 Recently, active site microenvironment engineering has shown advantages in regulating the physicochemical properties of pristine MOFs. 43 Apart from graing active catalytic ingredients into MOFs as linkers, 44 many strategies (i.e., defect engineering, 45 ultrathin engineerings, 46 and interface engineering 47 ) Fig.…”

Exploring the Self‐Cleaning Facets of Fluorinated Graphene Nanoarchitectonics: Progress and Perspectives

“…The selective oil/organic solvents collection prototypes with effective recovery of the oils from the surface waters has been investigated through engineering innovative materials demonstrating special‐wetting functions [104–107] . There is a lot of interest in the creation of amphiphobic surfaces with various Metal–Organic Frameworks (MOF) wherein issues such as transparency, chemical stability, hydrolytic stability and moisture sensitivity needs improvement [108–117] …”

“…amphiphobic surfaces with various Metal-Organic Frameworks (MOF) wherein issues such as transparency, chemical stability, hydrolytic stability and moisture sensitivity needs improvement. [108][109][110][111][112][113][114][115][116][117] Hydrophobic MOF hybrids can be synthesized by in-situ method or by introducing new hydrophobic species into the synthetic reactions of the already reported MOFs. [118,119] The importance of choosing 2D templates for the in-situ growth and assembly of MOF and related materials stems from the surface texture, functional groups, intrinsic hydrophobicity and their dispersion ability.…”

Recent progress in porous catalysts for dehydrogenation of ammonia borane

“…Hydrogen energy is considered as an important energy carrier, because it has a high gravimetric energy density and can completely react with oxygen in a fuel cell with the only byproduct being water. 1,2 Concerning the low volumetric energy density, the safe storage and transportation of hydrogen are still the bottlenecks in the utilization of hydrogen energy in the future. 3,4 Although a few physical storage processes, such as liquefaction, compression, and physisorption in porous materials, have been investigated, their harsh operating conditions (high pressure and low temperature) and high cost still hinder their on-board applications.…”