PdCoNi alloy nanoparticles decorated, nitrogen-doped carbon nanotubes for highly active and durable oxygen reduction electrocatalysis

NiCoPd Inlaid NiCo-Bimetallene for Efficient Electrocatalytic Methanol Oxidation

“…XPS , respectively. 37,38 Similar shifts for Co 2p (∼0.9 eV) are from 778.40 to 779.30 eV (Co 2p 3/2 ) and from 794.00 to 794.9 eV (Co 2p 1/2 ) (Figure 3e). 37,38 However, the characteristic peaks of Pd 3d in NiCoPd/NiCo-bimetallene shift toward a lower binding energy side with a value of ∼0.80 eV, for example, from 334.90 to 334.1 eV (Pd 3d 5/2 ) and from 340.10 to 339.30 eV (Pd 3d 3/2 ) (Figure 3f).…”

“…37,38 Similar shifts for Co 2p (∼0.9 eV) are from 778.40 to 779.30 eV (Co 2p 3/2 ) and from 794.00 to 794.9 eV (Co 2p 1/2 ) (Figure 3e). 37,38 However, the characteristic peaks of Pd 3d in NiCoPd/NiCo-bimetallene shift toward a lower binding energy side with a value of ∼0.80 eV, for example, from 334.90 to 334.1 eV (Pd 3d 5/2 ) and from 340.10 to 339.30 eV (Pd 3d 3/2 ) (Figure 3f). 39,40 The reason for the above phenomenon is that the different electronegativities of the metals lead to effective electron transfer between metals in the alloy system, which results in the shift of the binding energy peak position in the XPS spectra.…”

“…The high-resolution XPS spectrum of Ni 2p is shown in Figure d. After the HCHO reduction and atom-diffusion-aging process, the binding energy shows that Ni 0 in NiCo-bimetallene is shifted to high binding energy (∼1.1 eV) from 852.3 and 870.3 eV to 853.4 and 871.3 eV for Ni 2p 3/2 and Ni 2p 1/2 , respectively. , Similar shifts for Co 2p (∼0.9 eV) are from 778.40 to 779.30 eV (Co 2p 3/2 ) and from 794.00 to 794.9 eV (Co 2p 1/2 ) (Figure e). , However, the characteristic peaks of Pd 3d in NiCoPd/NiCo-bimetallene shift toward a lower binding energy side with a value of ∼0.80 eV, for example, from 334.90 to 334.1 eV (Pd 3d 5/2 ) and from 340.10 to 339.30 eV (Pd 3d 3/2 ) (Figure f). , The reason for the above phenomenon is that the different electronegativities of the metals lead to effective electron transfer between metals in the alloy system, which results in the shift of the binding energy peak position in the XPS spectra. The characteristic peaks shift to higher binding energy orientations when the metals donate electrons to the others, whereas they would shift to a lower orientation when receiving electrons .…”

Fabrication of Pd/Mg2P2O7 via a Struvite‐Template Way from Wastewater and Application as Chemoselective Catalyst in Hydrogenation of Nitroarenes

“…In this research the Pd nanoparticles were synthesized according to the previous method, [30] and the face-centered cubic structure of Pd (PDF#46-1043) was ob- served based on plans of (111), (200), and (220) as shown in the XRD pattern (Figure S1 in the Supporting Information). [31] When the PdNPs were introduced into mesoporous support of Mg 2 P 2 O 7 , the relative intensity of the support did not change. However, the characteristic XRD reflection of PdNPs was not observed which indicated that the PdNPs were homogeneously dispersed, and the particle sizes were too small to display XRD reflections in the Pd-struvite nanofibers (Figure 1).…”

Fabrication of polyoxometalate-modified palladium–nickel/reduced graphene oxide alloy catalysts for enhanced oxygen reduction reaction activity

“…Pd-containing bimetallic alloyed catalysts, especially Pd-Ni alloys, indicate better electrocatalytic capabilities compared with monometallic systems. 20,21 On the other hand, to enhance the electro-catalytic ability and support the nanocatalysts, different kinds of carbon substrates such as carbon black, 10 carbon nanotubes (CNTs), 22,23 and graphite 24 have been employed when utilizing Pd or Pd alloy nanoparticles for the oxygen reduction. Among them, reduced graphene oxide (rGO), as a suitable electro-catalyst substrate, has been widely exploited owing to high chemical stability along with striking electron transport properties.…”