Highly stable Pt3Ni ultralong nanowires tailored with trace Mo for the ethanol oxidation

Integrating Low Pt-Based Ternary NiRuPt Nanoalloy on Hybrid TiO2-Based Oxide–Carbon Composite for Enhanced Ethanol Oxidation

“…In addition to the superior structural durability and corrosion resistance, the rutile Ti 0.9 Ir 0.1 O 2 support with (110) facets can form more oxygen vacancies, which act as a cocatalyst for water activation to form OH – , benefiting the removal oxidation of CO ads on Pt sites, thus releasing Pt active-surface sites. , (ii) Alloying Pt with Ru and Ni atoms results in the lattice strain effect and electronic effect on the Pt, which is evidenced by XRD and XPS, modifying the adsorption/desorption ability for intermediate species, thereby enhancing the activity and CO-tolerance. The presence of the (100) facet in the NiRuPt alloy, which is observed from HR-TEM and CV results, can be efficient in the C–C cleavage in the ethanol molecule due to its lower activation barrier, facilitating the EOR according to the C 1 pathway. , (iii) Introducing Ru and Ni accelerates water dissociation at the low potential to generate OH – species, promoting the adsorbed intermediate oxidation on the Pt, enhancing the CO-tolerance and stability. ,, …”

“…5,26 (iii) Introducing Ru and Ni accelerates water dissociation at the low potential to generate OH − species, promoting the adsorbed intermediate oxidation on the Pt, enhancing the CO-tolerance and stability. 2,4,27 To summarize, the small-size NiRuPt alloy catalyst is successfully anchored on the hybrid Ti 0.9 Ir 0.1 O 2 −C composite surface, serving as an efficient EOR catalyst in the acidic environment. In particular, the NiRuPt/Ti 0.9 Ir 0.1 O 2 −C exhibits mass activity (720.75 mA mg Metal −1…”

“…Direct ethanol fuel cells have increasingly gained attention as sustainable and environmental-friendly energy conversion devices for portable and stationary applications due to the large energy density, diverse source, and safety for storage and transportation of ethanol fuel. , Although Pt-based binary alloy catalysts are a recent positive step forward to overcoming disadvantages (i.e., sluggish reaction kinetics, intermediate poisons, etc.) of the monometallic Pt catalyst for the EOR process, their catalytic stability is limited by the metal component dissolution in a strongly acidic electrolyte .…”

Bimetallic Pt‐Hg Aerogels for Electrocatalytic Upgrading of Ethanol to Acetate

“…The past decades have witnessed tremendous advances for the development of Pt-based electrocatalysts toward EOR by tuning their nanostructures, morphologies, electronic structures, alloying effects, and metal-support interactions. [21,[23][24][25][26][27][28][29][30] Among them, metallic aerogels, self-assembled from metal nanoparticles, have provoked tremendous attention in the field of electrocatalysis because they combine the superior advantages of macroscopic aerogels (high porosity, high surface area, interconnected framework, and self-supportability) and the excellent physicochemical properties of metal nanoparticles (high intrinsic catalytic activities and tunable nanostructures). [31][32][33][34] In detail, these features promote electrocatalysis by facilitating the exposure of active sites, accelerating the transport of molecules and electrons, and improving the specific activities.…”

“…The C2 pathway is the partial oxidation reaction, during which each ethanol molecule delivers 4 electrons to yield acetic acid as the final product. [20][21][22][23][24][25] Thus, it provides a promising alternative approach to produce acetic acid, which has a global demand up to 12 × 10 6 tons per year. However, the electrochemical production of acetic acid via ethanol upgrading is hampered by the low efficiency and selectivity of electrocatalysts.…”