Enhanced Electrocatalytic Performance of Pt₃Pd₁ Alloys Supported on CeO₂/C for Methanol Oxidation and Oxygen Reduction Reactions

Abstract

Direct methanol fuel cell (DMFC) with noble metals based anode and cathode is a promising energy generator to portable power devices. However, the deterioration of catalyst performance suffered by CO poisoning, crossover of fuel from anode to cathode, and higher economical cost of such devices hinder their commercialization. Herein, all of the above issues have been neutralized and crossed the huge hump of faced challenges. Highly efficient, durable, and surfactant-free catalyst with ultralow Pt3Pd1 loadings supported on CeO2/C was synthesized. The ex-situ and in situ spectroelectrochemical techniques such as, CV, in situ FTIR, and online DEMS studies confirm the highly efficient activity of catalyst toward electro-oxidation of methanol. In addition, the critical and detailed analysis of RDE results prove the superiority of the present material for electro-reduction of oxygen along a cathode side. The as-synthesized catalyst has proven itself as a better substitute for commercial Pt/C catalyst, with enhanced and durable performance as anode and cathode material for DMFCs. The obtained remarkable performance of catalysts can be attributed to the accumulative effects of PtPd bimetallic NPs and the enhanced synergistic factors of CeO2 in a hybrid material.

Electroless Nanoplating of Pd−Pt Alloy Nanotube Networks: Catalysts with Full Compositional Control for the Methanol Oxidation Reaction

“…[17][18][19][20][21][22][23][24][25] For instance, compared to their constituents, bimetallic PdÀ Pt nanomaterials can offer improved activity in catalytic applications. [22][23][24][25] Aside the composition, the shape and size of nanostructures represent important factors in determining their properties. In this regard, metal nanotubes (NTs) as one-dimensional, hollow nanoobjects frequently outperform more conventional morphologies, such as nanoparticles (NPs).…”

Methanol dissociation and oxidation on single Fe atom supported on graphitic carbon nitride

“…Theoretical studies have found that many metals have catalytic properties for methanol oxidation, which has attracted great interest, such as Sn, Cu, Ni, Mo, etc. In recent years, many researchers have been working on the application of platinum‐based bimetallic alloy catalysts in DMFCs, such as Pt–Pd, Pt–Ag, Pt–Ru, Pt–Fe, Pt–Sn, Pt–Au, Pt–Co, Pt–Ni and Pt–Mo . The results show that these alloy catalysts have good effect on the decomposition and oxidation of methanol, while reducing the cost of raw materials and improving the tolerance towards CO poisoning .…”

Effect of thiophene S on the enhanced ORR electrocatalytic performance of sulfur-doped graphene quantum dot/reduced graphene oxide nanocomposites

“…[8][9][10] Yousaf et al have investigated the electrocatalytic performance of Pt and Pd alloys for methanol oxidation reactions and ORR. 11,12 However, platinum and its alloys have disadvantages, such as high cost, scarce resources and inferior durability, that impede their widespread commercialization and limit their performance. 1,8 Therefore, there is an urgent need to search for new cheap metal or metal-free catalysts with unexceptionable electrocatalytic properties for ORRs.…”