Carbothermal redox reaction in constructing defective carbon as superior oxygen reduction catalysts

Abstract

The defects can greatly promote the catalytic activity of the carbon-based electrocatalyst due to charge redistribution of the electroneutral π-conjugated structure. However, it is still a huge challenge to introduce...

Vacuum-Dried and Intrinsic Photothermal Phenolic Carbon Aerogel from Coal Tar Rich in Polycyclic Aromatics for Efficient Solar Steam Generation

“…29 The relative ratio of D and G bands (I D /I G ) increases in the order: 30%CPCA-500 < 30%CPCA-700 < 30%CPCA-900, indicating that 30%CPCA-900 has a large number of defects, which may be ascribed to the formation of graphitic nitrogen and denitrogenation/deoxygenation at high temperatures. 30 It is important to reveal chemical structures of the aerogels for understanding the wettability and water transportation. Therefore, FTIR and X-ray photoelectron spectroscopy (XPS) were used to analyze functional groups and occurrence of heteroatoms in the aerogels.…”

“…As Figure d displays, all the Raman spectra of CPCAs have D and G bands arising from the disordered structure and ordered graphitic carbon in carbon materials, respectively . The relative ratio of D and G bands ( I D / I G ) increases in the order: 30%CPCA-500 < 30%CPCA-700 < 30%CPCA-900, indicating that 30%CPCA-900 has a large number of defects, which may be ascribed to the formation of graphitic nitrogen and denitrogenation/deoxygenation at high temperatures . It is important to reveal chemical structures of the aerogels for understanding the wettability and water transportation.…”

Recent advances of bifunctional catalysts for zinc air batteries with stability considerations: from selecting materials to reconstruction

“…23). 91,100,105,106,128,130,131,[133][134][135]141,144,148,187,189,192,194,198,212,214,216,225,226,240,242,246,248,[253][254][255]257,258,263,267,287,289,290,295,308,314,322, As a backup battery, higher actual specic energy is expected to meet the needs of wearable devices; zinc-air batteries need a exible substrate and high-power output.…”

“…Fig. 23 Performance of different type of catalysts in the zinc-air battery according to reports 91,100,105,106,128,130,131,[133][134][135]141,144,148,187,189,192,194,198,212,214,216,225,226,240,242,246,248,[253][254][255]257,258,263,267,287,289,290,295,308,314,322,. …”

Carbon-based single-atom catalysts: impacts of atomic coordination on the oxygen reduction reaction

“…Therefore, defect engineering is equally indispensable for enhancing the catalytic activity of SACs. 86,87 The actual catalysts may contain a large number of defects, and it has been shown that appropriate defects enhance the ORR performance of the catalysts. 88 Yuan et al 89 devised the decarboxylationinduced defect strategy for the preparation of defect-rich Co SACs.…”