Carbon-supported co-pyridine as non-platinum cathode catalyst for alkaline membrane fuel cells

A non-noble material cathode catalyst dual-doped with sulfur and nitrogen as efficient electrocatalysts for oxygen reduction reaction

“…4. It can be seen clearly that the Tafel slopes for the Fe-N/C-TsOH-600 is around -44.9 mV·dec -1 , which is quite similar with Pt/C[21], implying that the rate-determining step of the ORR is similar for both the Fe-N/C-TsOH-600 and Pt/C catalysts. On the contrary, the Tafel slopes of the Fe-N/C-TsOH and Fe-N/C-TsOH-700 catalysts are as high as -22.8 mV·dec -1 and -35.7 mV·dec -1 as shown inFig.…”

“…It was thought that the sulfur group doped to the M-N/C might be helpful for entrapping M ions in an environment rich in pyrrole-type nitrogen or pyridine-type nitrogen. For instance, N/S co-doped Vulcan XC-72R has been demonstrated to show superior ORR performance with excellent activity [21] and durability [22]. In a previous work [23], a p-Toluenesulfonic acid (TsOH)-doped Fe-N/C catalyst, namely Fe-N/C-TsOH, has been successfully developed in our group.…”

Novel Pd-decorated amorphous Ni–B/C catalysts with enhanced oxygen reduction reaction activities in alkaline media

“…The less corrosive alkaline electrolyte in alkaline polymer electrolyte fuel cells (APEFCs) permits non-Pt materials, especially some transition metals, [7][8][9][10][11] to be used as ORR catalysts. 12 Transition metal oxides, transition metal hydroxides and transition metal suldes have been studied intensively for oxygen reduction reactions. 3,11,13,14 For instance, Zhaoqing Liu et al synthesized urchin-like NiCo 2 O 4 spheres as efficient ORR electrocatalysts.…”

Electrocatalytic Activity of Fe-N/C-TsOH Catalyst for the Oxygen Reduction Reaction in Alkaline Media

“…And this is the reason why several different types of nitrogencontaining macrocycles, inorganic salts, and organometallic compounds have been employed as the precursors to form metalnitrogen complexes. [5][6][7][8][9][10][11] Polypyrrole (PPy), a conducting polymer with many pyrroletype N atoms, altering surface, and easy preparation and doping, has been widely used for the synthesis of M-Nx/C since it was first investigated by Yuasa et al 12 in 2005. Yuasa et al found that Co-PPy/C ORR activity enhanced after being pyrolyzed for the cobalt site forming four coordinate bonds with the nitrogen of the PPy rings (Co-N4).…”

“…It was thought that the sulfur group doped to the M-Nx/C might be helpful for entrapping M ions in an environment rich in pyrrole-type nitrogen or pyridine-type nitrogen. For instance, N/S co-doped Vulcan XC-72R has been demonstrated to show superior ORR performance with excellent activity 9 and durability. 14 Based on the above conception, p-toluenesulfonic acid (TsOH) and polypyrrole were used as dual-dopant (S and N) to synthesize a novel non-precious metal catalyst based on carbon-supported ferrum, polypyrrole, and TsOH complex (Fe-N/C-TsOH).…”