Phase-dependent electrocatalytic activities of Pt-anchored rutile, anatase and mixed anatase-rutile TiO2 nano-composites for methanol oxidation in alkali

Synergistic photo-enhanced electrocatalysis of Pt–ZnO–Bi2O3 heterojunction for methanol oxidation under visible light illumination

“…The photo-electrocatalytic activity of MOR can be guided by the electrochemically active specific surface area (ECSA) of Pt in the catalysts, particle dispersion in the surface, the interaction of Pt with metal oxide, and bandgap of the heterojunctions. 13,24,26,46 For all the PZB heterojunctions, the smaller the size of Pt (from TEM), the larger the surface area of catalysts. The ECSA (m 2 g −1 ) calculated from the reduction of PtO monolayer 22 from cyclic voltammogram using 1 M NaOH solution (supporting document S1, Fig.…”

“…At first, time-coursed current density measurements were performed for 7200 s in 10 mL 0.5 M methanol + 1 M NaOH solution taking PB, PZ, PZ25B1, and PZ30B1 composites as working electrodes, at constant potential −0.3 V with respect to SCE under both light and dark conditions. 24,33,45 Then, the resulting solutions were studied for high-performance liquid chromatography (HPLC) (Shimadzu Corporation, Japan) and Gas Chromatography-Mass Spectrometry (GCMS) was performed on Thermo Fisher ITQ900 instruments (EI) and a TG-SQC capillary column using helium gas as a carrier.…”

“…This dispersion in the surface, the interaction of Pt with metal oxide and bandgap of heterojunctions. 13,24,26,46 For all the PZB heterojunctions, smaller the size of Pt (from TEM) larger is the surface area of catalysts. The ECSA (m 2 g -1 ) calculated from the reduction of PtO S5) decreases in the order: PZ5B1 (40.5) > PZ20B1 (32.5) > PZ25B1 (30.9) > PZ30B1 (24.6) > PZ1B1 (20.9) > PZ (18.5) > PZ1B5 (17.9) > PB (14).…”

“…Metal oxides such as TiO 2 , 13–15 ZnO, 16 WO 3 , 17 CeO 2 , 18 SiO 2 , 19 V 2 O 5 , 20 SnO 2 , 21 and Bi 2 O 3 , 22 have been endorsed as potential supports for Pt owing to strong metal-support interaction, outstanding physicochemical properties, co-catalytic activity and also enhancement of electrocatalytic activity on photoexcitation. 23 Recently, ternary heterojunction catalysts, such as Pt anchored anatase-rutileTiO 2 , 24 Pt/Cu 2 O/GNs, 25 Pt–BiOI/MoS 2 , 26 Pt/SnO 2 /GNs, 27 TiO 2 /ZnO/Pt, 28 Pt–CuI/TiO 2 , 29 Pt (Pd)/ZnO, 30 Pt/WO 3 –NaTaO 3 , 31 Pt–Ru/TiO 2 , 32 NiO–TiO 2 /Pt, 33 and Pt/ZnO/KB 34 have been employed for methanol oxidation by photo-illumination. The most studied oxide, TiO 2 , has a high bandgap and absorbs UV light, which is no more than 5% of solar radiation reaching the earth's surface.…”

Facile Synthesis of Fiber‐Reinforced Catalyst for High Performance Ethanol and 2‐Propanol Oxidation

“…[21,22] Experiments have shown that the use of TiO 2 can increase the activity and stability of the catalyst. [23][24][25][26][27] It is also known that precious materials such as Pt are frequently used in fuel cell studies. Recent research has shown that Pd and Pd-based materials also provide a similar electrocatalytic activity as Pt.…”