Pt 3 Fe Nanoparticles on B,N-Codoped Carbon as Oxygen Reduction and pH-Universal Hydrogen Evolution Electrocatalysts

作者：Yueyang Qiao, Jiayao Cui, Fangren Qian, Xiaoyi Xue, Xiangping Zhang, Haitao Zhang, Wenqi Liu, Xiaojin Li, Qingjun Chen · 发表于：ACS Applied Nano Materials · 年份：2021 · DOI：10.1021/acsanm.1c03046 · 被引用次数：17 · 研究领域：Electrocatalysts for Energy Conversion、Fuel Cells and Related Materials、Advanced battery technologies research

A critical issue in hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) is to improve the activity and durability of Pt-based catalysts. In this study, a catalyst was prepared with Pt 3 Fe nanoparticles anchored on the B,N-codoped carbon (Pt 3 Fe/BNC) having significant HER activity in pH-universal electrolytes and significant ORR activity in acidic media. The as-prepared Pt 3 Fe/BNC catalyst exhibits notable HER catalytic activity with small overpotentials (η) at j = 10 mA cm –2 (η = 24 mV in 1.0 M KOH, 72 mV in 1.0 M phosphate-buffered saline (PBS), 38 mV in 0.5 M H 2 SO 4, respectively) and significant ORR performance with a half-wave potential ( E 1/2 ) of 0.835 V in acidic media. Metal–B bonds are demonstrated to form at the interface between Pt 3 Fe alloys and the B,N-codoped carbon layer, in addition to abundant immobilized Pt 3 Fe alloys that boost the activity of Pt 3 Fe/BNC. This research provides a new strategy for designing Pt-based nanostructures to improve the HER performance at all pH ranges and ORR performance in acidic media.