Morphological tuning engineering of Pt@TiO₂/graphene catalysts with optimal active surfaces of support for boosting catalytic performance for methanol oxidation

Abstract

The fabrication of highly active and stable Pt-based catalysts is an essential factor for the large-scale development of direct methanol fuel cells (DMFC), which is currently hampered by inefficient metal...

Understanding the suppressive role of catalytically active Pt–TiO2 interfacial sites of supported metal catalysts towards complete oxidation of toluene

“…The importance of interfacial metal–oxide sites has also been studied for the oxidation of short organic compounds and oxidative dehydrogenation (ODH) reactions. 33–35…”

“…The importance of interfacial metal-oxide sites has also been studied for the oxidation of short organic compounds and oxidative dehydrogenation (ODH) reactions. [33][34][35] However, it remains an open question how the interfaces affect the catalytic performance and the molecular reaction pathway for more complex reactions and molecules. One intriguing example is the catalytic combustion of toluene, which is an important reaction for air pollution abatement.…”

Pt Nanowires on Monolayered Graphene Oxide for Electrocatalytic Oxidation of Methanol

“…7,18 In addition, Pt-based catalysts are prone to agglomeration during the electrocatalytic process of methanol oxidation, so it is necessary to search for catalyst supports with high specific surface area, rich Pt anchoring sites, and high stability. 19,20 In previous studies, some support materials, such as TiO 2 , 21 carbon nanotubes, 22 and graphene, 23 have been studied. Among these support materials, graphene has attracted great attention because of its large carrier mobility and high chemical, mechanical, and thermal stability.…”

Mixed-oxide-containing composite-supported MoPt with ultralow Pt content for accelerating hydrogen evolution performance

“…S15, ESI†), assigning to the combination of the advantages of composite and alloy. 3,4 In addition, the MoPt/Ti 0.9 Ir 0.1 O 2 –C catalyst possessed superior mass activity, for example, at the overpotential of 50 mV RHE , the mass activity of the MoPt/Ti 0.9 Ir 0.1 O 2 –C catalyst was 454.05 mA mg Metal −1 , which is 2.04- and 2.52-times enhancement compared to 222.47 mA mg Metal −1 of Pt/Ti 0.9 Ir 0.1 O 2 and 180.26 mA mg Metal −1 of Pt/C, respectively. The mass activity at 300 mV of the MoPt/Ti 0.9 Ir 0.1 O 2 –C catalyst was 849.36 mA mg Metal −1 , as illustrated in Fig.…”

“…6 Moreover, the Vulcan XC72 carbon black was pre-treated by applying an acidization method to remove impurities and generate more oxygen-containing functional groups, which can strongly bond with the hydroxyl group on the TiO 2 -based material surface to form stable composites. 4,8 A more detailed characterization of the Ti 0.9 Ir 0.1 O 2 –C support is shown in Fig. S1–S14 in ESI †.…”