Composition‐controlled effects of Pb content in PtPbRu trimetallic nanoparticles on the electrocatalytic oxidation performance of methanol

Lattice Strain and Composition Effects on the Methanol Oxidation Performance of Platinum–Ruthenium–Nickel Ternary Nanocatalysts

“…36−38 Notably, both XRD and TEM results suggested that no significant difference in the particle size with increasing Ni content facilitated the exclusion of particle size effect from the influential factors for investigating the catalytic efficiency of PtRuNi catalysts. 39 The elemental composition of Pt-based ternary alloys was characterized via EDX mapping analysis (Figures 2f,g 5,20,36 The effect of the nickel content on the electrochemical behaviors of PtRuNi ternary catalysts for the MOR was investigated in an acidic electrolyte. Figure 4a S3).…”

Alloying with Mn Enhances the Activity and Durability of the CoPt Catalyst toward the Methanol Oxidation Reaction

“…The incorporation of extra transition metals like Mn and Co into Pt in a Pt 100−x (MnCo) x /C (16 < x < 41) catalyst is expected to modify the electronic structure of the Pt surface, promote reaction kinetics, facilitate electron transfer, and also accelerate the removal of CO molecules to improve MOR catalytic activity, as has been confirmed in numerous reports. [21][22][23][24][25]53 These findings, as summarized in Figure 5, help to explain why the trimetallic Pt 100−x (MnCo) x /C (16 < x < 41) catalyst is active as compared to Pt/C. Previously, we have reported a DFT study for PtCo binary alloy catalysts with different compositions and tested them as catalysts for MOR.…”

“…Among the various Pt-based alloys, PtCo bimetallic alloys have been the most promising catalysts for MOR. , Despite great progress made in the development of bimetallic alloys as MOR catalysts, a material that displays better activity and durability than commercial Pt-based catalysts is still elusive. Recently, a few reports have claimed that the addition of a small quantity of another metal to the bimetallic system can enhance the durability of the Pt-based bimetallic catalyst, making it better tolerant to CO poisoning. − In addition, a ternary Pt-based alloy is likely to show better activity than a single or bimetallic alloy due to change in the electronic and structural characteristics of Pt . Therefore, it is expected that trimetallic alloys of the variety PtMCo (where M is any transition metal) could further enhance durability as well as display better electrocatalytic performance.…”

Toward Electrocatalytic Methanol Oxidation Reaction: Longstanding Debates and Emerging Catalysts

“…[44] Whereas, the classical bifunctional mechanism (accelerate the CO removal) is still the mainstream no matter in the advanced PtRu catalysts or other oxophilicspecies-modified Pt systems. [45][46][47][48][49] In our opinion, the bifunctional mechanism or "revised bifunctional mechanism" may be true under certain conditions, while it might fail to elucidate another system. More advanced in situ and operando characterization techniques should be applied to verify the proposed mechanism as highlighted in Section 5.1.…”