Facile Synthesis Of Composition‐Controllable PtPdAuTe Nanowires As Superior Electrocatalysts For Direct Methanol Fuel Cells

Abstract

Multicomponent Pt-based nanowires (NWs) have attracted widespread attentiona se letrocatalysts toward direct alcohol fuel cells because of their unique one-dimensional structure and high reactiond ynamics. Quaternary PtPdAuTeN Ws are designedv ia af acile template method, and NWs with ad ifferent composition are obtained by adjusting the feed ratio of metal precursors. The direct displacement reactiono fm etal precursors with Te NWsa nd the partial oxidation of Te lead to the formation of quaternary NWs. The rough surfacea nd abundant reactive sites deriving from the rearrangement of metal atoms on the Te NWs surface endow the PtPdAuTeN Ws with as uperior electrocatalytic propertya nd durability for methanol oxidation. The Pt 20 Pd 20 Au 10 Te 50 NWs display the largestm ass activity and best stabilitya mong all catalysts. The preparation of PtPdAuTeNWs could provideaviable strategy for the preparation of other multicomponent NWs.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

Lattice Strain and Composition Effects on the Methanol Oxidation Performance of Platinum–Ruthenium–Nickel Ternary Nanocatalysts

“…Figure a depicts cyclic voltammetry (CV) curves of all studied catalysts that exhibited the hydrogen adsorption–desorption region of typical Pt-based materials in the acidic environment. The electric double-layer gradually large with increasing Ni content in PtRuNi alloys, indicating that as-made PtRuNi alloys exhibited high charge accumulation and electron/mass transport for electrochemical reactions, similar to what was reported for multicomponent Pt-based alloys. ,,, The Pt 60 Ru 20 Ni 20 /C catalyst demonstrated the largest double-layer capacitance among the as-made Pt-based alloys. The electrochemical surface area (ECSA) values were determined from the electric charge in the H ads desorption region (eqs S5–S6) to be 54.03, 50.64, 43.29, and 28.43 m 2 g Metal –1 of Pt 70 Ru 30 /C, Pt 70 Ru 20 Ni 10 /C, Pt 60 Ru 20 Ni 20 /C, and Pt 50 Ru 20 Ni 30 /C, respectively (Figure S3).…”

Te nanowires: facile synthesis and application in the preparation of PtTe nanowires for ammonia oxidation

“…Third, it can alleviate the dissolution, aggregation, and Ostwald ripening that the nanoparticles usually suffer from, and thus have better durability than nanoparticles. 5,6 Particularly, Te nanowires (Te NWs) have attracted great attention as templates for the synthesis of 1D Pt-based catalysts, [7][8][9][10][11][12][13][14][15] such as PtTe nanotubes, 7 PtCu nanowires, 8 PtCu nanotubes, 9 PtPdRuTe nanotubes, 10 PtCoTe nanotubes, 11 PtPdAuTe nanowires, 12 PtCo nanotubes, 13 PtNi nanotubes, 13 PtRhTe nanotubes, 14 and PtPd nanowires. 15 In terms of the methods for the synthesis of Te NWs, the hydrothermal synthesis method was widely used, in which N 2 H 4 ÁH 2 O was employed as a reducing agent, and a high heating temperature (180 1C) was indispensable.…”

“…15 In terms of the methods for the synthesis of Te NWs, the hydrothermal synthesis method was widely used, in which N 2 H 4 ÁH 2 O was employed as a reducing agent, and a high heating temperature (180 1C) was indispensable. [7][8][9][10][11][12][13][14][15] For example, Yu et al 10 synthesized Te NWs by the hydrothermal synthesis method. In their synthesis, polyvinylpyrrolidone (PVP) and Na 2 TeO 3 were dissolved in distilled deionized water under vigorous magnetic stirring at room temperature, and then hydrazine hydrate and aqueous ammonia solution were added.…”

PtRuFe/Carbon Nanotube Composites as Bifunctional Catalysts for Efficient Methanol Oxidation and Oxygen Reduction

“…So far, substantial research studies have been dedicated to the improvement of both MOR and ORR activities by optimizing the structure of catalysts and designing Pt-based binary, − ternary, − and quaternary catalysts. − As the ideal catalyst for bimetallic systems, the PtRu catalyst still faces the challenges of high cost, CO poisoning, and poor catalytic stability. In this case, extensive studies have focused on solving the above problems of the PtRu catalyst by introducing the third metal such as Fe, Co, Ni, Cu, etc.…”