Transformation of waste onion peels into core-shell Fe3C@ N-doped carbon as a robust electrocatalyst for oxygen evolution reaction

Template-Assisted Mechanosynthesis Leading to Benchmark Energy Efficiency and Sustainability in the Production of Bifunctional Fe–N–C Electrocatalysts

“…11 Additionally, the synergic interaction between the nanoparticle core and carbon shell contributes to the overall performance by modulating the local electronic structure. 38,39 As expected, compressionderived 3D-FeNC-LAC demonstrates a considerably higher concentration of nanoparticles (Figure 3d) with a larger average size of 32.67 nm (inset in Figure 3d) and fewer singleatom sites (Figure 3e). To ascertain the nature of particles in 3D-FeNC-LAC, STEM (Figure 3f) and EDS elemental maps (Figure S3) were used, which further reveal that these nanoclusters are in the form of oxide-covered Fe 3 C species surrounded by graphitic carbon layers.…”

Free-standing P-doped Fe2O3/ZnO nanotubes as a bifunctional electrocatalyst for electrochemical water splitting

“…FO-P2 displayed comparatively lower values of both mass transfer and charge transfer resistance, which could be responsible for its better catalytic performance. 55,63 These results from the various electrochemical analyses demonstrate that P doping substantially impacts the OER activity of the catalyst.…”

“…5d, Table ST1 in ESI †). [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55] Such a drastic change in the catalytic activity aer phosphorus doping can be attributed to the changes in the electronic structure caused by P doping. Such alteration in the electronic structure can enhance the catalytic activity by affecting the energetics of the interaction between the catalyst and reaction intermediate.…”

Waste to wealth: direct utilization of spent materials for electrocatalysis and energy storage

“…58 Waste onion peels were transformed into core–shell Fe 3 C@N-doped carbon as a reliable OER electrocatalyst. 93 In conclusion, natural carbon sources obtained from biomass are economical and eco-friendly materials for creating high-quality composite electrocatalysts. 94 The preparation of efficient OER electrocatalysts from waste biomass is a good choice depending on different synthesis approaches.…”

“…Corn stover 49 Porous activated carbon HER Onion peels 93 OER Red dates 114 ORR Tobacco stems 115 CO 2 RR Reed 173 LIBs Apples 195 LOBs Nori 185 LSBs Wood sawdust 197 SIBs Bagasse 201 KIBs Plastic PET 63 Activated carbon HER PE 118 ORR PU 120 LSBs PS 229 Supercapacitors Sludge Municipal sludge 28,142 Porous carbon CO 2 RR Electroplating sludge 143 CuCr Si/CNTs/C LIBs inside the cylinder collide, shear, and friction with the materials, enabling the formation of the material's crystal structure and surface chemistry, which can be used for largescale production in an environmentally friendly manner. 128 Compared with the calcination method, hydrothermal method, and wet chemical method, ball milling results in a wider particle size distribution (nanometer to micrometer range) and longer preparation time.…”