Single Cu atom dispersed on S,N-codoped nanocarbon derived from shrimp shells for highly-efficient oxygen reduction reaction

Facile Preparation of Nitrogen-Doped Carbon Spheres with Wrinkled Cage-Supported Single-Atom Copper Catalysts for Selective Oxidation of Glycerol to Formic Acid

“…DABT in the synthesis can act as the chelating agent to coordinate with copper nitrate to form a DABT-Cu complex in methanol, which were molecularly mixed with hydrothermal carbon-encapsulated DFNS. Thus, the formation of Cu nanoparticles can be prevented during the wet ball milling process. , Melamine was also used as the cheating agent and nitrogen source to prepare NCSWC-supported Cu catalysts (the obtained sample is denoted as Cu/NCSWCs-M) following the same synthetic process; however, as shown in Figure S1c,d, numerous copper nanoparticles with different sizes can be detected on NCSWCs. In a previous study, melamine can coordinate with copper nitrate to form a melamine-copper complex; however, cyanuric acid was also needed to co-stabilize Cu atoms in the thermal polymerization process to produce the uniform distribution of the isolated Cu atoms in the carbonitride support. , Thus, DABT can more effectively stabilize the Cu atoms than melamine, thus enabling the Cu species to atomically disperse on NCSWCs after pyrolysis.…”

“…Thus, the formation of Cu nanoparticles can be prevented during the wet ball milling process. 21,37 Melamine was also used as the cheating agent and nitrogen source to prepare NCSWC-supported Cu catalysts (the obtained sample is denoted as Cu/NCSWCs-M) following the same synthetic process; however, as shown in Figure S1c,d, numerous copper nanoparticles with different sizes can be detected on NCSWCs. In a previous study, melamine can coordinate with copper nitrate to form a melamine-copper complex; however, cyanuric acid was also needed to costabilize Cu atoms in the thermal polymerization process to produce the uniform distribution of the isolated Cu atoms in the carbonitride support.…”

Biomass derived robust Fe4N active sites supported on porous carbons as oxygen reduction reaction catalysts for durable Zn–air batteries

“…In response, the conversion of renewable biomass into ORR catalysts is an excellent choice. 30 Biomass possesses many advantages, such as cost-effectiveness, sustainability and eco-friendliness. [31][32][33][34] Soluble starch, a type of biomass, is the main energy storage form of plants, which is widely found in grains, fruits, roots, tubers, and corms.…”

Highly Efficient Fabrication of Kilogram-Scale Palladium Single-Atom Catalysts for the Suzuki–Miyaura Cross-Coupling Reaction

“…Qiao et al reported that Pd 1 /MgO and Pd 1 /TiO 2 prepared by the ball milling method showed excellent catalytic properties in acetylene semi-hydrogenation reactions. Moreover, ball milling can enhance the dispersion of precursors in supports due to the promoting effect of strong mechanical forces . In our previous works, we employed acetylacetonate salts or acetate salts as precursors to prepare oxide-supported noble metal (e.g., Pd, Ir, and Au) SACs using the ball milling method, and the results showed that no magnification effect was observed when the fabrication was scaled up. , However, when acetylacetonate salts or acetate salts were used as precursors, the productivities of SACs were only ∼21 and ∼53 wt %, respectively, showing a low utilization rate of precursors.…”

“…Recently, the ball milling process has caught increasing attention as its advantages (e.g., facile, low cost, eco-friendly, and readily scalable) in the synthesis of SACs and the enhancement of the defects on the supports. , For instance, Li et al reported that the collisions of iron balls could transform mechanical energy into structural disordering and in situ generate defects on the supports (e.g., MgO, SiO 2 , and CeO 2 ) to anchor iron single atoms . Qiao et al reported that Pd 1 /MgO and Pd 1 /TiO 2 prepared by the ball milling method showed excellent catalytic properties in acetylene semi-hydrogenation reactions.…”