The high cost and limited supply of platinum has driven intensive research into the use of non-platinum group metal (PGM-free) as cathode oxygen reduction reaction (ORR) catalysts for proton exchange...
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,Ncodoped 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.
As a fuel or energy carrier, hydrogen has been identified as a key way to decarbonize electricity, industry, transportation, and heating sectors. Hydrogen can be produced from a variety of...
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