To lower CO2emissions and address the current energy crisis, one of the most promising approaches that converting the captured CO2into valuable chemicals and fuels via electrocatalysis is proposed recently. Metal‐organic frameworks (MOFs) as an emerging multifunctional material have been extensively designed for electrocatalytic reduction of CO2. In terms of chemical and structural properties, 2D MOFs have obvious superiority over 3D bulk MOFs. Specifically, the large porosity and ultrathin structure of the 2D materials contribute to exotic properties such as enhanced electrical conductivity and rapid mass transport during reactions, which are in favor of electrocatalysis. In this review, the design strategies of 2D MOFs are discussed. Then, the recent advances of MOFs and their derivative catalysts with unique 2D structures for CO2reduction are introduced. These examples are expected to provide clues to rational design strategies and synthesis of high‐performance CO2electroreduction, beyond the bulk MOFs.

The construction of hydrogen-bonded organic framework materials by intermolecular hydrogen bonding forces has been rapidly developed in the last decade, among which, the strong intermolecular hydrogen bonding and functional binding sites exhibited by nitrogen-containing functional groups have made them favorites for designing organic components to customize functionalized porous materials. This review systematically introduces the types of nitrogen-containing monomers used to prepare porous hydrogen-bonded organic backbones and the principles of their construction, summarizes the design advantages of crystalline materials from an elemental perspective, and presents the applications of such HOFs in the fields of gas adsorption/separation, molecular recognition, plasmonic conductivity, biomedical, and luminescent materials, etc. Finally, the prospects for the development of such materials are discussed and potential directions for future work are analyzed.[a] Z.

Rational design of crystalline porous materials with coupled proton‐electron transfer has not yet been reported to date. Herein, we report a donor‐acceptor (D‐A) π‐π stacking hydrogen‐bonded organic framework (HOF; HOF‐FJU‐36) with zwitterionic 1,1′‐bis(3‐carboxybenzyl)‐4,4′‐bipyridinium (H2L2+) as acceptor and 2,7‐naphthalene disulfonate (NDS2−) as donor to form a two‐dimensional (2D) layer. Three water molecules were situated in the channels to connect with acidic species through hydrogen bonding interactions to give a 3D framework. The continuous π‐π interactions along the a axis and the smooth H‐bonding chain along the b axis provide the electron and proton transfer pathways, respectively. After 405 nm light irradiation, the photogenerated radicals could simultaneously endow HOF‐FJU‐36 with photoswitchable electron and proton conductivity due to coupled electron‐proton transfer. By single‐crystal X‐ray diffraction (SCXRD) analyses, X‐ray photoelectron spectroscopy (XPS), transient absorption spectra and density functional theory (DFT) calculations, the mechanism of the switchable conductivity upon irradiation has been demonstrated.

No abstract

Here a single-phase proton- and electron-conducting metal-organic coordination polymer (MOCP) electrocatalyst for CO2 reduction reaction (CO2RR) was constructed by using Ag as the metal center and 1H-1,2,3-triazole (Tz) as ligand....