Bimetallic Pt or Pd-based carbon supported nanoparticles are more stable than their monometallic counterparts for application in membraneless alkaline fuel cell anodes

Self-Optimized Ligand Effect of Single-Atom Modifier in Ternary Pt-Based Alloy for Efficient Hydrogen Oxidation

“…It is an effective method to change the adsorption strength of intermediates by adjusting the d-band center (ε d ) position of Pt. , Thus, tuning the relative position of ε d of the catalysts can significantly influence the electrocatalytic performance, which encourage the seeking of suitable approaches to regulating the ε d . − Among them, alloying Pt with foreign metals is a promising means to modify electronic properties of the active sites. − To date, a wide variety of Pt-containing binary alloys have been designed and prepared, such as Pt–Ru, Pt–Cu, Pt–Pd, etc. − Therein, Pd, possessing comparable intrinsic properties with Pt and weaker CO adsorption capacity, is expected to mediate the CO adsorption of Pt and improve the antipoisoning capability. ,− Since the ternary alloy has one more element than the binary alloy, it provides more tunability and possibility in the combination of components and can further regulate ε d via strain and ligand effect. − Specifically, ligand effects, which are a result of the heterometallic atomic neighboring and induce charge transfer between different atoms, play a critical role in determining the catalytic activity. , Non-noble late 3d transition metals that possess lower electronegativity than Pt have the potential to induce strong ligand effects from M to Pt, making them promising candidates as a third metal. ,, Moreover, the dilution of the foreign metal to a single-atom level can enhance heteroatom interaction to the greatest extent, probably leading to a strong ligand effect to further optimize the electronic structure of the alloy. − Drawing inspiration from the above, injecting monodispersed metal atoms into Pt-based binary alloys as modifiers to adjust their reactivity will produce significant performance improvements. ,,− Also, understanding the possible synergetic effects underlying ternary alloy-based enhancement, especially under operation conditions, can provide guidance for discovering structure–activity relationships in more complex multimetallic systems.…”

Tailoring the Durability of Carbon-Coated Pd Catalysts Towards Hydrogen Oxidation Reaction (HOR) in Alkaline Media

“…However, the intrinsic feature of PGMs to catalyze the carbon oxidation reaction, even being less catalyzed for Pd than Pt and PtRu, [19] still requires improvements in their chemical composition. This statement and the current experimental results suggest that bimetallic carbon-coated catalysts may consist of a better combination of activity and durability, owing to the improved catalytic performance of bimetallic/bifunctional materials [48][49][50] and better durability of Pd-M alloys versus monometallic towards HOR catalysis. [51] This is the next step that will soon be evaluated by the team.…”

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

“…In the device, hydrogen, ammonia, and other gas fuels can be selected, but also methanol, ethanol, formic acid, and other liquid fuels. [3][4][5][6] At present, there are great difficulties in the transportation and storage of natural gas. Therefore, liquid fuels based on small organic molecules have great potential for industrial applications.…”