Methane Storage and Purification of Natural Gas in Metal-Organic Frameworks.

Natural gas, primarily composed of methane (CH), represent an excellent choice for a potentially sustainable renewable energy transition. However, the process of compressing and liquefying CH for transport and storage typically results in significant energy losses. In addition, in order to optimize its efficacy as a fuel, the CH content of natural gas needs to be increased to a level of at least 97 % to ensure its quality and efficiency in various applications.

Metal-Organic Framework Derived NiP/FeP@NPC Heterojunction as Stability Bifunctional Electrocatalysts for Large Current Density Water Splitting.

The construction of heterojunction has been widely accepted as a prospective strategy for the exploration of non-precious metal-based catalysts that possess high-performance to achieve electrochemical water splitting. Herein, we design and prepare a metal-organic framework derived N, P-doped-carbon-encapsulated NiP/FeP nanorod with heterojunction (NiP/FeP@NPC) for accelerating the water splitting and working stably at industrially relevant high current densities. Electrochemical results confirmed that NiP/FeP@NPC could both accelerate the hydrogen and oxygen evolution reactions.

Controllable Exfoliation of MOF-Derived Van Der Waals Superstructure into Ultrathin 2D B/N Co-Doped Porous Carbon Nanosheets: A Superior Catalyst for Ambient Ammonia Electrosynthesis.

The electrocatalytic nitrogen reduction reaction (NRR) to synthesize NH under ambient conditions is a promising alternative route to the conventional Haber-Bosch process, but it is still a great challenge to develop electrocatalysts' high Faraday efficiency and ammonia yield. Herein, a facile and efficient exfoliation strategy to synthesize ultrathin 2D boron and nitrogen co-doped porous carbon nanosheets (B/NC NS) via a metal-organic framework (MOF)-derived van der Waals superstructure, is reported. The results of experiments and theoretical calculations show that the doping of boron and nitrogen can modulate the electronic structure of the adjacent carbon atoms; which thus, promotes the competitive adsorption of nitrogen and reduces the energy required for ammonia synthesis.

Reticular Coordination Induced Interfacial Interstitial Carbon Atoms on Ni Nanocatalysts for Highly Selective Hydrogenation of Bio-Based Furfural under Facile Conditions.

A rational design of transition metal catalysts to achieve selective hydrogenation of furfural (FFR) to tetrahydrofurfuryl alcohol (THFA) under facile conditions is a promising option. In this work, a series of Ni catalysts were synthesized by controlled thermal treatment of Ni-based metal-organic frameworks (MOFs), with the purpose of modulating the interface of nickel nanoparticles by the reticular coordination in MOF precursors. The catalytic performance indicates that Ni/C catalyst obtained at 400 °C exhibits efficient conversion of FFR (>99%) and high selectivity to THFA (96.

Self-Terminating Surface Reconstruction Induced by High-Index Facets of Delafossite for Accelerating Ammonia Oxidation Reaction Involving Lattice Oxygen.

Ammonia (NH ) is a promising hydrogen (H ) carrier for future carbon-free energy systems, due to its high hydrogen content and easiness to be liquefied. Inexpensive and efficient catalysts for ammonia electro-oxidation reaction (AOR) are desired in whole ammonia-based energy systems. In this work, ultrasmall delafossite (CuFeO ) polyhedrons with exposed high-index facets are prepared by a one-step NH -assisted hydrothermal method, serving as AOR pre-catalysts.

Adsorption in Reversed Order of C Hydrocarbons on an Ultramicroporous Fluorinated Metal-Organic Framework.

Metal-organic frameworks have been widely studied in the separation of C hydrocarbons, which usually preferentially bind unsaturated hydrocarbons with the order of acetylene (C H )>ethylene (C H )>ethane (C H ). Herein, we report an ultramicroporous fluorinated metal-organic framework Zn-FBA (H FBA=4,4'-(hexafluoroisopropylidene)bis(benzoic acid)), shows a reversed adsorption order characteristic for C hydrocarbons, that the uptake for C hydrocarbons of the framework and the binding affinity between the guest molecule and the framework follows the order C H >C H >C H . Density-functional theory calculations confirm that the completely reversed adsorption order behavior is attributed to the close van der Waals interactions and multiple cooperative C-H⋅⋅⋅F hydrogen bonds between the framework and C H .

Sustained-Release Method for the Directed Synthesis of ZIF-Derived Ultrafine Co-N-C ORR Catalysts with Embedded Co Quantum Dots.

M-N-C catalysts with optimized local and external structures offer great potential for replacing expensive and labile Pt-based catalysts for the oxygen reduction reaction (ORR) in fuel cells. Herein, we report a novel and facile strategy of synthesizing ultrafine ZIF-derived Co-N-C catalysts by precisely controlling the crystallization rate of ZIFs. The employment of meta-soluble Co-doped basic zinc acetate (Co-BZA), which shows a sustained-release effect in solvents, allows for the control of the solubility of Co-BZA in solvents.

Adsorption Site Selective Occupation Strategy within a Metal-Organic Framework for Highly Efficient Sieving Acetylene from Carbon Dioxide.

The separation of acetylene and carbon dioxide is an essential but challenging process owing to the similar molecular sizes and physical properties of the two gas molecules. Notably, these molecules usually exhibit different orientations in the pore channel. We report an adsorption site selective occupation strategy by taking advantage of differences in orientation to sieve the C H from CO in a judiciously designed amine-functionalized metal-organic framework, termed CPL-1-NH .