Role of heteroatom-doping in enhancing catalytic activities and the stability of single-atom catalysts for oxygen reduction and oxygen evolution reactions

Abstract

Single-atom catalysts (SACs) are promising as efficient electrocatalysts for clean energy technologies such as fuel cells, water splitting, and metal-air batteries. Still, the unsatisfied loading density and stability of the...

Novel 2D carbon material T-graphene supported 3d transition metal single atoms as efficient oxygen reduction catalysts

“…In the current research, to boost the catalytic performance of catalysts, the main focus is placed on changing the central metal, 24 adjusting the coordination number [28][29][30] and the coordination environment [31][32][33] of the active central metal, or building defects [34][35][36] and doping heteroatoms into the carbon-based support. [37][38][39][40][41] In fact, investigating the effects of different carbon supports on the SACs is also very significant for designing ORR catalysts.…”

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

“…68,69 Other techniques have also been used to characterize the structure of SACs, such as X-ray powder diffraction (XRD), Mössbauer spectroscopy, etc. 70 The structure of SACs changes during the reaction, so precise in situ techniques are needed to observe the dynamic changes of the structure, such as in situ XAS. In general, all these excellent characterization techniques have played great roles in exploring the structure of SACs.…”

Activity Regulation of Fenton/Fenton‐like Reactions in Single‐Atom Catalysis

“…Although Zheng et al studied the effect of sulfur doping on the stability of SACs, it was limited to the mechanism of acid leaching. [75] The destruction of membrane materials is an urgent problem to be solved before application. The main idea of researchers is to improve the ORR activity of metal sites that do not have Fenton reaction activity originally, so that they could be comparable to Fe-SACs with superior performance.…”

“…Although Zheng et al. studied the effect of sulfur doping on the stability of SACs, it was limited to the mechanism of acid leaching [75] . The destruction of membrane materials is an urgent problem to be solved before application.…”