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Role of P-doping in Antipoisoning: Efficient MOF-Derived 3D Hierarchical Architectures for the Oxygen Reduction Reaction

Najam, Tayyaba, Shah, Syed Shoaib Ahmad, Ding, Wei, Wei, Zidong
Journal of physical chemistry 2019 v.123 no.27 pp. 16796-16803
accelerated aging, catalysts, catalytic activity, electrochemistry, ions, nitrogen oxides, phosphoric acid, phosphorus, physical chemistry, platinum, sulfur oxides, temperature
Developing nonprecious metal catalysts to efficiently catalyze the oxygen reduction reaction (ORR) is the nub for replacing precious metal catalysts and therefore of central importance for technological breakthrough. Herein, we reported that P-doping can improve the catalytic performance of the Fe–NC catalyst with antipoisoning ability. The P-doped Fe–NC catalyst showed a positive shift in the half-wave potential (>50 mV) and high resistance against poisoning molecules (SOₓ, NOₓ, and POₓ ions) for ORR in both alkaline and acidic media, as compared to the Fe–NC catalyst. Furthermore, an accelerated aging operation applied at the temperature ranging from 25 to 50 °C in 1 M H₃PO₄ demonstrated a good stability of the produced P-doped Fe–NC catalyst. In contrast, a drastic loss in the catalytic performance of Pt/C (20%) was observed in the same poisoning and aging conditions.