A spin-coated TiOx-modified Pt anodic catalyst for the direct methanol fuel cells. (December 2022)

• Record Type: Journal Article
• Authors: Al-Akraa, Islam M.; Mohammad, Ahmad M.
• Is Part Of: Energy reports. Volume 8(2022)Supplement 16
• Page Start: 438
• Page End: 442
• Publication Date: 2022-12
• Subjects: Fuel cells -- Methanol electro-oxidation -- Spin-coating -- Platinum -- Titanium -- Charge transfer; Power resources -- Periodicals; Energy industries -- Periodicals; Power resources; Periodicals; Electronic journals; 621.04205
• DOI: 10.1016/j.egyr.2022.10.317
• Languages: English
• ISSNs: 2352-4847

Abstract

Abstract: In this investigation, a spin-coated titanium oxide (TiOx, 60 nm thick with a porous morphology and mostly in anatase structure) modified platinum (Pt) catalyst was fabricated atop of a silicon (Si) substrate before annealing for the use as an efficient anodic catalyst for the methanol electro-oxidation (MO). The temperature of annealing was optimized; seeking the highest catalytic activity and stability toward the MO. The PtTi-700 catalyst (that was annealed at 700 °C) showed the highest activity (with ca. 11-fold increase in the oxidation current density) and stability (ca. 19-fold increase after 50 cycles of potential scanning between −0.6 and 0.4 V vs. Ag/AgCl) if compared to the bare (unmodified) Pt electrode. The enhancement in the charge transfer kinetics and significant reduction of the catalyst's poisoning could elaborate the origin of catalysis.