Activity-stability benefits of Pt/C fuel cell electrocatalysts prepared via remote CeO2 interfacial doping

Tuning the Product Selectivity toward the High Yield of Glyceric Acid in Pt−CeO2/CNT Electrocatalyzed Oxidation of Glycerol

“…of Pt 0 in PtÀ CeO 2 /CNT and Pt/CNT are almost identical (Table S1), the Pt 0 peaks upshift by 0.6 eV in PtÀ CeO 2 /CNT, indicating a strong metal-support interaction between Pt and CeO 2 , which benefits for the glycerol electro-oxidation reaction. [44,45] The same phenomenon is observed in Pt/CeO 2 and other PtÀ CeO 2 /CNT samples (m CeO2 :m CNT = 0.75 : 1, 1 : 1, 2 : 1, 3 : 1) (see Figure S3, S4, and Table S1). The redox properties of Pt/CNT and PtÀ CeO 2 /CNT were investigated by H 2 -TPR (Figure 1f).…”

A trifunctional N-doped activated carbon–ceria shell, derived from covalent porphyrin polymers for promoting Pt activity in fuel cell cathode performance

“…64 Although Pt supported CNT/ceria could be interesting as an advanced cathode in PEMFC operations, dissolution of ceria from the support after 2000 cycles of ADST may be troublesome. 67 In contrast to Pt/CeO 2 , the current sharply decreases compared to Pt/C and is based on Pt/C@CeO 2 , with the lowest power density observed in Pt/CeO 2 (403 mW cm −2 at 0.45 V). This investigation demonstrates the role of supported ceria with nitrogen-doped carbon (Pt/C@CeO 2 ; 524 mW cm −2 at 0.49 V) with improved PEMFC activity.…”

Manipulating the interaction of Pt NPs with N-hollow carbon spheres by F-doping for boosting oxygen reduction/methanol oxidation reactions

“…47 It is worth investigating the binding energy of Pt 4f in Pt@N,F-HCS, which had a significant positive shift of about ∼0.2 eV as compared with Pt@N-HCS, which also means that the charge environment of Pt was reconstructed in glycol reflux solution. 48,49 In a wet chemical reduction environment, most of the Pt of the two catalysts was anchored to the surface of the carbon support as Pt 0 , while the content of Pt x + species in Pt@N,F-HCS catalysts significantly increased (20.8% → 30.3%) as compared with Pt@N-HCS (Table S4†). Pt x + was derived from the electron transfer between Pt NPs and carbon-based supports, resulting in a change in the local electron density on Pt sites.…”