Transition Metal (Fe, Ni, Mn) with Heteroatoms B and S Tri-doped Co/C Catalysts for Oxygen Reduction Reaction

Abstract

Developing catalysts with nonprecious metals for the oxygen reduction reaction (ORR), a reaction with a complex process and sluggish kinetics, is the most important goal for many researchers in the clean energy conversion area. Herein, a metalfree heteroatoms dual-doping with metal secondary-doping strategy, namely transition metal (M = Fe, Ni, Mn) combined with heteroatoms B and S tri-doped Co/C catalysts for ORR are reported and compared. Electrochemical results show that the obtained FeBS-Co/C exhibits the best catalytic performance with the ORR peak potential at 877 mV and the half-wave potential at 862 mV, as compared to NiBS-Co/C (838 and 805 mV) as well as MnBS-Co/C (852 and 818 mV). The electron transfer number (n) and HO 2 − % of FeBS-Co/C are more than 3.8 and less than 10%, respectively, indicating the major four-electron reaction route for catalyzing ORR, much better than those of the other two catalysts. Results of structural characterizations demonstrate that FeBS-Co/ C has a structure of B and S heteroatom dual-doped carbon with amorphous FeCoOBO 3 to improve the ORR catalytic activity. This work provides a general strategy for enhancing ORR catalytic performance of catalysts.

Coal-Derived N-Doped Porous Carbon Accompanied with Fe2O3 for Oxygen Reduction Reaction

“…The appearance of the D peak is attributed to the crystallite effect, referring to the defect and disorder induction, while the G peak is produced by the stretching motion of all pairs of sp 2 atoms in a carbon ring or a long chain. 13,24 Therefore, the intensity ratio of the D and G band (I D /I G ) can be used to describe the disorder degree of carbon samples. 6,25 As shown in table S1, it can be clearly seen that the value of I D /I G is AC-1 (0.990) < AC-3 (1.081) < AC-4 (1.086) < AC-2 (1.095), meaning that the introduction of heteroatoms of N and/or metal can increase the disorder degree of AC samples.…”

“…on porous carbon material, always have excellent ORR catalytic performances. [9][10][11][12][13] There are many substances which can be used to obtain porous carbon materials. As we all known, coal is one of the most abundant fossil fuels in the world, playing an important role in the development and progress of human society.…”

Review and Perspectives of Carbon-Supported Platinum-Based Catalysts for Proton Exchange Membrane Fuel Cells

“…Therefore, Ptbased electrocatalysts are the best choice for practical PEMFCs. 37 One strategy for scaling up PEMFC production is to reduce the quantity of Pt required while maintaining the catalytic activity and catalyst durability. The ultimate goal of preparing low-Pt catalysts is to achieve synergistic progress in both the economics and the durability of Pt-based catalysts.…”

“…Furthermore, nonprecious metal catalysts have poor stability and limited performance in complex electrolyte environments, and it is difficult to assume that these catalysts will be used for commercialization in the fuel cell industry. Therefore, Pt-based electrocatalysts are the best choice for practical PEMFCs …”