Design principles for the synthesis of platinum–cobalt intermetallic nanoparticles for electrocatalytic applications

Abstract

As the development of polymer exchange membrane fuel cells (PEMFCs) speeds up in recent years, producing active and durable electrocatalysts become an increasingly important technical challenge. Platinum-cobalt (Pt-Co) alloy electrocatalyst...

Mild Synthesis of Planar PdPtAuAgCuIr Nanocrystals with Granular Edges for Improved Ethanol Electrooxidation

“…Multimetallic nanocrystals have attracted enormous research interests in the past decades. [1] Compared to monometallic counterparts, the close contact between multiple metals confined in one entity significantly facilitates the interactions, thus resulting in interesting physiochemical properties that can be difficult to be expected for other structures. [2] For example, as revealed by Nørskov et al, the metallic doping could be used to manipulate the surface strain of metallic particles, causing the noticeable change in the overall d-band shape and thus the d-band center.…”

“…Multimetallic nanocrystals have attracted enormous research interests in the past decades [1] . Compared to monometallic counterparts, the close contact between multiple metals confined in one entity significantly facilitates the interactions, thus resulting in interesting physiochemical properties that can be difficult to be expected for other structures [2] .…”

Defect Engineering in Composition and Valence Band Center of Y2(YxRu1–x)2O7−δ Pyrochlore Electrocatalysts for Oxygen Evolution Reaction

“…Hydrogen is an energy carrier that has the potential to play a crucial role in the carbon neutral society. − A proton exchange membrane (PEM)-based water electrolyzer may produce high-purity hydrogen gas at high current density with low ohmic loss because of the high ionic conductivity. − It also has a compact design, a fast system response, and low energy consumption. These attributes make the PEM-based water electrolyzer one of the most attractive devices to produce green hydrogen. ,,, Under acidic operating conditions, water molecules are oxidized at the anode to generate oxygen (O 2 ), which is called the oxygen evolution reaction (OER). ,, A large overpotential is often required for OER due to the slow electron transfer in various elemental steps, which result in sluggish kinetics. − Therefore, efficient electrocatalysts are needed to lower the reaction kinetic barrier and accelerate the water splitting by reducing the OER overpotential. ,,, …”

High Metal Loading, Two Nanometer-Sized Platinum Zinc Intermetallic Nanoparticles from Atomically Dispersed Precursors for Hydrogenation Reaction

“…Structurally ordered intermetallic nanoparticles (NPs) have attracted much interest as a new generation of catalysts with promising activity and durability, especially in several fast-growing fields, such as electrocatalysis − and selective hydrogenation. , Incorporation of non-precious metals (M) into precious metals such as platinum (Pt) is desirable because of the considerations of not only sustainability and elemental abundance but also improved activity and stability . It is common that Pt intermetallic NPs could achieve higher catalytic activity than pure Pt after the optimization of compositions and structures .…”