One-step preparation of eggplant-derived hierarchical porous graphitic biochar as efficient oxygen reduction catalyst in microbial fuel cells

Abstract

Eggplant-derived hierarchical porous graphitic biochar possessed good electrochemical performance as oxygen reduction reaction catalyst for microbial fuel cells.

Modified Water Hyacinth Biochar as a Low-Cost Supercapacitor Electrode for Electricity Generation From Pharmaceutical Wastewater

“…Although the maximal CD and PD of the CMFC with the AC electrode (control treatment) were 0.132±0.000 A/m 2 (16.500±0.001 A/m 3 ) and 0.007±0.000 W/m 2 (0.833±0.001 W/m 3 ) respectively. Single chamber MFC Water hyacinth 900 0.027 [25] Single chamber MFC Egg plant 800 0.667 [26] Stack MFC Corn cob 100-500 0.038 [27] Dual chamber MFC Rice straw 450 NA [28] Table 1. Comparison of biochar-based electrodes used in MFC.…”

Fe/N codoped porous graphitic carbon derived from macadamia shells as an efficient cathode oxygen reduction catalyst in microbial fuel cells

“…The formation of the pore structure of the material mainly utilizes the following mechanisms, as shown in eqn (3)- (8). First, K 2 FeO 4 starts to react and be decomposed at 300 °C to form Fe(OH) 3 , KOH, Fe 2 O 3 , and K 2 O.…”

“…Furthermore, MSAC-750 has the highest content of pyridine-N and Fe-N X , which allows for more active sites of the ORR. 8 As shown in Fig. 6(a), the Tafel curve can also be used to study the catalytic performance of different MSAC catalysts.…”

Use of Biochar-Based Cathodes and Increase in the Electron Flow by Pseudomonas aeruginosa to Improve Waste Treatment in Microbial Fuel Cells

“…Many studies have recently shown the applicability of biochars as anodes, cathodes, and semipermeable membrane materials in MFCs [7,[22][23][24][25][26][27]. Biochars are complex, heterogeneous materials consisting of mineral phases, amorphous carbon, graphitic carbon, and labile organic molecules, many of which can be either electron donors or acceptors [7,24].…”

“…Many studies have recently shown the applicability of biochars as anodes, cathodes, and semipermeable membrane materials in MFCs [7,[22][23][24][25][26][27]. Biochars are complex, heterogeneous materials consisting of mineral phases, amorphous carbon, graphitic carbon, and labile organic molecules, many of which can be either electron donors or acceptors [7,24]. Joseph et al reported in [28] that nanoparticles with redox-active Fe-and Mn-based minerals, usually present in high-temperature biochars, play an important role in mediating the direct electronic transfer (DET) among bacteria (such as Geobacter spp and Shewanella oneidensis) and the anode.…”