Pt@Mesoporous PtRu Yolk–Shell Nanostructured Electrocatalyst for Methanol Oxidation Reaction

Abstract

Design of a Pt-based catalyst with desired nanoarchitectonics highly favors an enhanced electrocatalytic performance. Herein unique yolk–shell structures containing a Pt core and a mesoporous bimetallic PtRu shell (Pt@mPtRu YSs) are newly synthesized by a facile approach. Profiting from the spatially and locally separated accessible active sites on the interior Pt nanoparticle and exterior mesoporous PtRu nanocages, the Pt@mPtRu YSs show superior catalytic activity, durability, and CO tolerance for the methanol oxidation reaction. This facile method is very significant to the design of all-metallic yolk–shell catalysts for various electrocatalytic applications.

Pd‐Based Metallenes for Fuel Cell Reactions

“…Direct methanol fuel cells (DMFCs) are also recognized as renewable power sources for electronic vehicles due to their high energy density, high efficiency, as well as environment friendliness. [98,99] Pd and Pd-based nanomaterials with modified electronic structures are emerging as the promising electrocatalysts for boosting MOR due to that fact that a moderated electronic structure can enable Pd to weaken the adsorption of CO-like poisoning intermediates. [86] The electronic structure of Pd-based nanomaterials can be effectively modified via alloying, strain engineering, and interface engineering.…”

Core–shell Pd–P@Pt–Ni nanoparticles with enhanced activity and durability as anode electrocatalyst for methanol oxidation reaction

“…It is believed that the composition, shape, and structure of Pt-based nanomaterials are key factors that determine their electrocatalytic properties. [9][10][11] Until now, the introduction of less expensive metals, including Pd, 12,13 Cu, 14,15 Ni, [16][17][18][19] Ru, 20,21 Au, 22,23 to fabricate various bi-or multi-component electrocatalysts is an effective approach to not only reduce Pt loading, but also improve the activity and durability. Another promising method is to synthesize the core-shell structure by depositing Pt as thin shells on non-Pt cores.…”

Construction of Graphene-Wrapped Pd/TiO2 Hollow Spheres with Enhanced Anti-CO Poisoning Capability toward Photoassisted Methanol Oxidation Reaction

“…The conventional approach to deal with the CO-poisoning problem is engineering the electronic structure of precious metal by intermetallic alloying with a suitable foreign metal (i.e., PdCu microsphere and Pt@mesoporous PtRu yolk–shell nanostructure), , which was because the electronic interaction between the Pd and the alloy metal would lower the d band center position of Pd and thus decrease the sensitivity of the CO adsorption. , However, such a strategy is insufficient to suppress the CO poisoning due to the phase segregation and reconstruction of multimetal driven by oxidative potential sweeping and strong bonding of the active sites with the CO intermediate within hundreds of seconds . Besides, the support-free Pd-based catalysts still faced the issue associated with the aggregation during the long-time operation, which further deteriorated the stability of catalysts during the MOR process.…”