Details

Autor(en) / Beteiligte

• Li, Guang-Lan
• Yuan, Li-Fang
• Chen, Wen-Wen
• Yang, Bei-Bei
• Liu, Cai-Di
• Cheng, Guang-Chun
• Xu, Xiao-Cun
• Hao, Ce

Titel

Efficient hierarchically synthesized Fe 2 P nanoparticles embedded in an N,P-doped mesoporous carbon catalyst for the oxygen reduction reaction

Ist Teil von

• New journal of chemistry, 2018, Vol.42 (12), p.9488-9495

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The construction of nonprecious metal catalysts for the oxygen reduction reaction (ORR) is highly desirable but remains as a key challenge for fuel cells and metal–air batteries. Herein, we designed and synthesized novel Fe 2 P nanoparticles embedded in an N,P co-doped mesoporous carbon catalyst (Fe 2 P/NPC) through direct pyrolysis of o -methylaniline in the presence of FeCl 3 ·6H 2 O, H 3 PO 4 , silica nanospheres, and hexadecyltrimethyl ammonium bromide (CTAB) micelles. Transmission electron microscopy, Brunauer–Emmett–Teller (BET), X-ray diffraction and X-ray photoelectron spectroscopy measurements demonstrated that the obtained three-dimensional mesoporous Fe 2 P/NPC catalyst possessed a considerable specific surface area of 785 m 2 g −1 with high contents of Fe 2 P nanoparticles, pyridinic N, and graphitic N species. Electrochemical evaluations showed that the formed Fe 2 P/NPC exhibited superior ORR performance to Pt/C in terms of a comparable onset potential (−0.01 V vs. Ag/AgCl electrode), about 20 mV higher half-wave potential, excellent stability and remarkable methanol tolerance in alkaline media. The synergistic effect of pyridinic N, graphitic N and Fe 2 P species together with its three-dimensional porous structure contribute to the impressive ORR performance. This research, most importantly, provides new clues to the rational development of cost-effective FeP x -based catalysts for the ORR.