Electrochemical synthesis of Pt nanoparticles on ZrO2/MWCNTs hybrid with high electrocatalytic performance for methanol oxidation

Methanol and Ethanol Electrooxidation on ZrO2/NiO/rGO

“…To investigate the crystal structure and surface morphology of the synthesized nanocatalysts, X-ray diffraction ( Figure 1 ) and SEM analyses ( Figure 2 ) were performed, respectively. In the X-ray diffraction pattern of ZrO 2 /NiO (ZN), the characteristic peaks of ZrO 2 are observed at the diffraction angles of 30, 35.2, 50.2, and 60.3, which correspond to the (111), (200), (220), and (311) crystal planes, which is in complete agreement with (JCPDS, No.49-1642) [ 48 ]. The diffraction angles of NiO are also seen at 37.2, 43.2, 62.9, 75.2, and 79.4, which correspond to the (111), (200), (220), (311), and (222) crystal planes with (JCPDS, No.…”

“…ZrO 2 and NiO as catalysts in the form of composites with other materials (both expensive catalysts such as platinum and palladium and other inexpensive materials and substrates, including metal oxides and sulfides or conductive polymers) have been studied for the oxidation of alcohols [ 22 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 ]. However, catalysts including both ZrO 2 and NiO have not been tested in the oxidation of methanol and ethanol alcohols.…”

Electronic and Structural Modification of Three-Dimensional Porous NiCo@NF as a Robust Electrocatalyst for CO2 Emission-Free Methanol Upgradation to Boost Hydrogen Co-production

“…Noble metals, specifically Pt- and Pd-based electrocatalysts, are frequently used composites that demonstrate good catalytic activity for MOR. − However, because of their high price and scarcity, their widespread usage in the conversion of sustainable energy is limited. Moreover, the structural and chemical instability of the real active component in concentrated methanol further retards its commercialization.…”

A composite approach to synthesize a high-performance Pt/WO3–carbon catalyst for optical and electrocatalytic applications

“…For the synthesis of better performing fuel cell catalysts, different methods such as the intermittent microwave heating method (IMH), [14][15][16][17] electroless synthesis, 18 the solution plasma-assisted method, 19 electrochemical synthesis, 20 microwave-assisted microemulsion method, 21 hydrogen reduction method, 22 sol-gel process, 23 and hydrothermal method 24 have been reported in the literature, and also the selection of a suitable support is a crucial factor. The most commonly employed supports are various forms of carbon, which include Vulcan carbon (XC-72R), graphite, 25 multiwalled carbon nanotubes, 20,26 and carbon nanofibers 14,[27][28][29][30][31] Vulcan carbon has been widely employed for the development of low-temperature fuel cells because of its considerably high electrical conductivity, large specific surface area, and suitable pore structure, besides it being cheaper. 32 The problem faced for carbon supports is that they cannot prevent CO-poisoning of the metal nanoparticles; therefore, other supports should be investigated and, in this regard, metal oxides are emerging as CO-poisoning averting supports.…”

“…32 The problem faced for carbon supports is that they cannot prevent CO-poisoning of the metal nanoparticles; therefore, other supports should be investigated and, in this regard, metal oxides are emerging as CO-poisoning averting supports. Among metal oxides, besides others, TiO 2 , 23,33,34 ZrO 2 , 14,20 CeO 2 , 33 MnO 2 15 Mn 3 O 4 , 18 Fe 2 O 3 , 35 Nb 2 O 5 , 36 V 2 O 5 , 17 MoO 3 , 16 Fe 3 O 4 , 37 CoO, 19 MoO, 27 Gd 2 O 3 , 22 RuO 2 , 28 SnO 2 38 and WO 3 34 have been successfully employed as support materials for alcohol oxidation in fuel cells with improved catalytic activity for methanol oxidation, CO tolerance, and reduced cost. Generally, most of the oxides, however, offer a low surface area that results in poor dispersion of the metal nanoparticles and low catalytic activity.…”