Core-shell motif construction: Highly graphitic nitrogen-doped porous carbon electrocatalysts using MOF-derived carbon@COF heterostructures as sacrificial templates

Graphene–carbon 2D heterostructures with hierarchically-porous P,N-doped layered architecture for capacitive deionization

“…With an increasing world population, worsening environment, and climate and energy crises, [1][2][3][4] the economical supply of clean, potable water is rapidly becoming a critical issue for human subsistence. In this regard, capacitive deionization (CDI), an advanced electrochemical deionization technology, has emerged as a competitive methodology for the desalination of brackish water and seawater, due to its several important advantages including low energy consumption, cost effectiveness, and environmental benignity.…”

Amino-1H-tetrazole-regulated high-density nitrogen-doped hollow carbon nanospheres for long-life Zn–air batteries

“…The high-resolution N 1s spectrum of HCS derived from PPy at 750 C was deconvoluted into three peaks centered around 398.5, 400.1, and 401.1 eV, corresponding to Pr N, pyrrolic N, and Gr N, respectively. The proportion of pyrrolic N is highest among these species, indicating the low-efficiency conversion of N originating from PPy into pyridinic and graphitic N at 750 C. Following the addition of P-g-C 3 N 4 and a temperature increase to 950 C, the high-resolution N 1s spectrum of N-HCS exhibited a high level of Gr and Pr N, revealing that increased temperatures signicantly facilitate the conversion of pyrrolic N into Gr and Pr N. 21 Compared to mainstream N-doped carbon catalysts, N-HCS possesses a low total N content such that it fails to further improve the performance of the ORR. Increasing the total N content for the enhancement of the ORR can be achieved by using an efficient N source of ATTZ.…”

“…[12][13][14][15][16][17][18][19][20] When located in the edge area of carbon frameworks, N-doped carbons containing only effective N species provide plentiful active sites for the catalysis of ORR. 21 However, conicting reports have been published with respect to the active site afforded by N species. For example, Wei and co-workers demonstrated that pyridinic and pyrrolic N with planar sp 2 hybridization are active in the ORR, whereas graphitic N with a 3D sp 3 structure is responsible for poor catalysis.…”

Modification of Metal-Organic Framework-Derived Nanocarbons for Enhanced Capacitive Deionization Performance: A Mini-Review

“…Thanks to its well-defined structure and enhanced oxygen reduction ability, the 3D-FeNC tubes achieved both excellent salt removal ability and cycling performance in oxygenated saline water (Xu et al, 2020a ). The research reveals that high-performance oxygen reduction catalysts, such as Fe, N, and other heteroatom-doped carbon materials (Zhang et al, 2020 ), can significantly improve the continuous desalination performance of CDI. Heteroatom doping enables MOFCs with higher desalination capacity, faster adsorption rate, and more importantly, better stability.…”