Platinum quantum dots enhance electrocatalytic activity of bamboo-like nitrogen doped carbon nanotubes embedding Co-MnO nanoparticles for methanol/ethanol oxidation

Fabrication of donor‐acceptor ‐donor type conjugated polymers@double‐layered hollow carbon spheres composite as PtCu alloy catalyst support for MOR

“…Notably, all samples exhibited the typical S2p peak in the high‐resolution spectra S (Figure 6D), and corresponding peaks of catalyst were shifted to lower BE, which can be associated with the ligand effect and conduces to the anchoring and dispersion of PtCu NPs 37 . As Figure 6E shows peaks due to pyridinic‐N (398.38 eV), pyrrolic‐N (400.58 eV) and oxidized‐N (406.08 eV) were observed for poly(EPE)/DLHCs, while the N1s peaks of poly(EPE)/DLHCs/PtCu divided into two components of pyridinic‐N (399.48 eV) and pyrrolic‐N (401.48 eV) with a slightly shifting to higher binding energy, which suggests the strong interaction between nitrogen on polymer and PtCu alloy catalyst 38,39 . Further, the XPS results showed that content of nitrogen in poly(EPE)/DLHCs/PtCu and poly(BPE)/DLHCs/PtCu catalysts are 3.40% and 1.67%, respectively.…”

“…37 As Figure 6E shows peaks due to pyridinic-N (398.38 eV), pyrrolic-N (400.58 eV) and oxidized-N (406.08 eV) were observed for poly(EPE)/DLHCs, while the N1s peaks of poly(EPE)/ DLHCs/PtCu divided into two components of pyridinic-N (399.48 eV) and pyrrolic-N (401.48 eV) with a slightly shifting to higher binding energy, which suggests the strong interaction between nitrogen on polymer and PtCu alloy catalyst. 38,39 Further, the XPS results showed that content of nitrogen in poly(EPE)/DLHCs/PtCu and poly(BPE)/DLHCs/PtCu catalysts are 3.40% and 1.67%, respectively. The characteristic peaks at 71.38 and 74.58 eV in Figure 6G can be contributed to metallic Pt (Pt 0 ) Pt 4f7/2 and 4f5/2, in which occurred a slight shift to lower binding energy compared with the commercial Pt/C as previously reported.…”

Fe−Ni Diatomic Sites Coupled with Pt Clusters to Boost Methanol Electrooxidation via Free Radical Relaying

“…Subsequently, as the balance process occurring between CO adsorption and CO oxidation, the current density decreased gently and tended to be stable. Furthermore, it is universally acknowledged that a certain amount of electricity is needed to charge the double electrode layer when the electrode potential changes instantaneously [37] . Due to the large double electrode layer of the N‐doped carbon matrix, the initial current of Pt/FeNi−NC was significantly higher than Pt/C.…”

“…Furthermore, it is universally acknowledged that a certain amount of electricity is needed to charge the double electrode layer when the electrode potential changes instantaneously. [37] Due to the large double electrode layer of the N-doped carbon matrix, the initial current of Pt/FeNiÀ NC was significantly higher than Pt/C. To rule out this factor, we chose the current density of 30 s as the initial value to calculate the retention rate of current density (Figure S11).…”

Rational Design of NiZnx@CuO Nanoarray Architectures for Electrocatalytic Oxidation of Methanol

“…Fuel cells, especially direct methanol fuel cells (DMFCs), have been considered as an attractive energy conversion and storage device, which can directly utilize methanol as fuel and convert it into CO 2 . − In addition, methanol as one of the important CO 2 reduction products plays a critical role in a hypothesized carbon-neutral economy. , Nevertheless, the methanol oxidation reaction (MOR) generated in the DMFCs’ anode involves a six-electron transfer process, which makes it kinetically sluggish. − Thus, it is necessary to devote considerable effort to developing efficient and functional electrocatalysts. Despite Pt group metals (PGMs) demonstrating remarkable catalytic capability toward MOR, their low anti-CO poisoning ability resulting in a rapid current density decrease and the high cost of noble metal stocks severely hamper their practical implementation. − Consequently, it remains a great challenge to explore an alternative catalyst with efficient catalytic activity, favorable cost, and durability.…”