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Reconstruction of Scalable Amorphous Indium-Based Metal-Organic Framework for CO Electroreduction to Formate over an Ultrawide Potential Window.
ACS Appl Mater Interfaces
June 2024
School of Chemistry & Chemical Engineering, Nanchang University, Nanchang 330031, People's Republic of China.
Amorphous metal-organic frameworks (aMOFs) are highly attractive for electrocatalytic applications due to their exceptional conductivity and abundant defect sites, but harsh preparation conditions of "top-down" strategy have hindered their widespread use. Herein, the scalable production of aMIL-68(In)-NH was successfully achieved through a facile "bottom-up" strategy involving ligand competition with 2-methylimidazole. Multiple and characterizations reveal that aMIL-68(In)-NH evolutes into In/InO as the genuine active sites during the CO electrocatalytic reduction (CORR) process.
View Article and Find Full Text PDFIron carbide nanoparticles supported on an N-doped carbon porous framework as a bifunctional material for electrocatalytic oxygen reduction and supercapacitors.
Nanoscale
December 2022
Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Highly active and durable bifunctional materials are of pivotal importance for energy conversion and storage devices, yet a comprehensive understanding of their geometric and electronic influence on electrochemical activity is urgently needed. Fe-N-C materials with physical and chemical structural merits are considered as one of the promising candidates for efficient oxygen reduction reaction electrocatalysts and supercapacitor electrodes. Herein, FeC nanoparticles supported on a porous N-doped carbon framework (denoted as FeC/PNCF) were readily prepared by one-step chemical vapor deposition under the assistance of a NaCl salt template.
View Article and Find Full Text PDFBoron-Intercalation-Induced Phase Evolution of Rh Metallene for Energy-Saving H Production by H O Oxidation Coupled with Water Electrolysis.
Small
August 2022
State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, P. R. China.
Article Synopsis
- The study focuses on improving the electrocatalytic performance of metallene by tailoring its shape and crystal structure, specifically through the creation of hetero-phase RhB metallene (h-RhB metallene).
- The unique combination of amorphous and crystalline structures, along with the doping of non-metallic heteroatoms, enhances the electronic properties of h-RhB metallene, leading to superior performance in hydrogen production reactions.
- By utilizing a two-electrode system for water electrolysis, the h-RhB metallene achieves a notable reduction in cell voltage (0.379 V at 10 mA cm²) compared to traditional water splitting methods (1.35 V),
Structural and Electronic Modulations of Imidazolium Covalent Organic Framework-Derived Electrocatalysts for Oxygen Redox Reactions in Rechargeable Zn-Air Batteries.
ACS Appl Mater Interfaces
June 2022
Department of Materials Science and Chemical Engineering, Hanyang University, Ansan 15588, Republic of Korea.
Covalent organic frameworks (COFs) are promising candidates for the controllable design of electrocatalysts. However, bifunctional electrocatalytic activities for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) remain challenging in COFs. In this study, imidazolium-rich COFs (IMCOFs) with well-defined active sites and characteristic three-dimensional assembly structures were readily prepared, and their electronic structures were tuned by Co incorporation to elicit bifunctional electrocatalytic activities for the ORR and OER.
View Article and Find Full Text PDFMono-copper far more active than analogous di-copper complex for electrocatalytic hydrogen evolution.
Dalton Trans
March 2022
Department of Chemistry and the MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, PO Box 56, Dunedin 9054, New Zealand.
The di-copper(II) analogue, [Cu(bis-LEt)](BF) (2), of the previously reported mono-copper(II) complex [CuLEt]BF (1) which resulted in long lived electrocatalytic hydrogen evolution reaction (HER), has been prepared, characterised and tested for HER. The new bis-macrocycle, bis-HLEt, was formed from two HLEt Schiff base macrocycles (prepared by 1 + 1 condensation of 2,2'-iminobisbenzaldehyde and diethylenetriamine) being connected by selective alkylation of the less sterically hindered secondary alkyl amine group (NH) of each, using α,α'-dibromo--xylene to form a linker between them. The desired dicopper(II) complex, [Cu(bis-LEt)](BF)·4HO (2·4HO), was readily prepared, as a yellowish brown solid in 82% yield.
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