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A 3D cross-network Co3O4–xNx nanostructure is obtained from the cobalt–alanine complex (Co(C3H5O2N)2) by amino acid self-assembly and subsequent pyrolysis. In this process, Co(C3H5O2N)2 forms a 2D ...

Single-atom Ag-decorated MnO2 hollow microspheres (Ag-MnO2 HMSs) with oxygen vacancies are successfully fabricated via a self-template strategy and redox etching method. The transmission electron m...

Inspired by supermolecular self-assembly strategy, the N, P co-doped reduced graphene oxide (NP-rGO) material is fabricated by heat treatment from the supermolecular system of GO/MP (melamine and p...

Li4Ti5O12 (LTO)-carbon (C)-reduced graphene oxide (rGO) microspheres are synthesized via in situ supramolecular self-assembly, combined with spray drying and high-temperature calcination. Dopamine can polymerize on the surface of Ti(OH)4 and form polydopamine, through which graphene oxide(GO) connects with Ti(OH)4 uniformly and tightly to form a homogeneous supramolecular sol system. During the high-temperature calcination, polydopamine is carbonized to carbon to connect LTO with rGO, so that the aggregation of rGO is inhibited, and small-sized LTO particles are obtained. The scanning electron microscopy (SEM) image shows that in the as-prepared LTO-C-rGO microspheres, LTO particles with diameters of ∼50 nm remained homogeneous and wrapped in a three-dimensional network built by the rGO nanosheets. Electrochemical measurements show that the LTO-C-rGO anode exhibits a high reversible capacity of 184 mAh g–1 at 1 C and a high capacity retention of 94.5% after 500 cycles at 20 C. The above excellent electroc...

The NOx storage features and mechanism of a K-doped [Ca24Al28O64]4+·4O– catalyst (designated as C12A7-O–/K) were systematically investigated. The NOx storage capability (NSC) of the C12A7-O–/K catalyst was found to depend primarily on the temperature, the K-doping level, and the oxygen concentration in the gas mixture. The C12A7-O–/10%K catalyst exhibited the highest storage capacity among the C12A7-O–/M (M = K, Na, Mg) catalysts investigated, attaining a maximum NSC value of 183.9 μmol/g at about 550 °C. The optimum temperature window for NOx storage with C12A7-O–/10%K catalyst ranged from 400 to 650 °C. Thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopy were utilized to identify the catalyst characteristics and the active species, both in the body of the catalyst and on its surface. Additionally, anionic time-of-flight mass spectrometry (TOF-MS) measurements were employed to investigate the anionic intermediates desorbed from the catalyst surfa...