PtP₂ nanoparticles on N,P doped carbon through a self-conversion process to core–shell Pt/PtP₂ as an efficient and robust ORR catalyst

Abstract

Proton-exchange membrane fuel cells have been reported as one of the most promising substitutes for fossil fuel and limited oxygen reduction reaction (ORR) kinetics on the cathode still remain the...

Anion-Modulated Platinum for High-Performance Multifunctional Electrocatalysis toward HER, HOR, and ORR

“…Regarding P2p core-level spectra ( Figure 2 D), the subpeaks at 133.4 and 132.5 eV are attributed to the presence of P-O and P-C species, as well as two weak subpeaks observed at about 129.3 and 130.2 eV are assigned to the Pt−P bond, suggesting a successful formation of PtP 2 @PNC ( Zhang et al., 2015 ). The BE of 129.3 eV for P 2p 3/2 exhibits a negative shift from that of P 0 (130.2 eV) ( Tian et al., 2020a , 2020b ), which indicates that P is negative charge (δ−). These results points to weak electron density transfer from Pt to P in the PtP 2 @PNC.…”

“…As illustrated in Figure 1 , PtP 2 @PNC was fabricated by a facile pyrolysis method. First, phytic acid (PA) cross-linked platinum complexes (PtPA) were formed based on the strong chelating ability of PA ( Tian et al., 2020a , 2020b ; Zhou et al., 2019 ). Then, PtPA-dicyandiamide supermolecular aggregate was produced via a simple cooperative assembly process in water at room temperature ( Zhang et al., 2016a , 2016b ).…”

“…During the past few years, intense investigations have been made in this field and a bunch of optimized strategies has been designed to lower the Pt loading and improve utilization efficiency. Among those strategies, the most widely applied method to reach this significant challenging goal is to alloy Pt together with other low-cost 3d transition metals ( Tian et al., 2020a , 2020b ; Wu et al., 2013 ; Porter et al., 2013 ). Owing to the optimized structure and electronic effects caused by M (M = Fe, Co, Ni, Cu, Cr, Ti, V, Pb, Mn, etc.…”

Carbon Aerogels as Electrocatalysts for Sustainable Energy Applications: Recent Developments and Prospects

“…Obviously, a catalyst that promotes the four-electron transfer reaction is what we need. Currently, platinum (Pt)-based catalysts are still the best catalysts for ORR, usually synthesized by dispersing Pt nanoparticles onto carbon supports to solve the problem of the reduced exposed active surface due to aggregation and non-uniform dispersion of platinum nanoparticles [ 46 , 47 , 48 , 49 ]. Highly active Pt/C catalysts have been commercialized.…”

Heterogeneous nanocomposites consisting of Pt3Co alloy particles and CoP2 nanorods towards high‐efficiency methanol electro‐oxidation

“…The synthesis and electrocatalytic evaluations of noble metal‐containing heterogeneous nanocomposites bloom in recent years upon recognition of their huge potentials in electrocatalysis, for example, alcohol oxidation, 11–22 oxygen reduction, 23–25 and hydrogen evolution 26–32 . Typically, as revealed by in situ‐attenuated total reflection surface‐enhanced infrared radiation absorption spectroscopy, in nanocomposites composed of Pt and CoP components, the presence of CoP can promote the full oxidation of methanol to CO 2 , endow the Pt domains with high activity and improved anti‐poisoning capability in methanol electro‐oxidation 33 .…”