Dongshuang Wu

The platinum-group metals (PGMs) are six neighboring elements in the periodic table of the elements. Each PGM can efficiently promote unique reactions, and therefore, alloying PGMs would create ideal catalysts for complex or multistep reactions that involve several reactants and intermediates. Thus, high-entropy-alloy (HEA) nanoparticles (NPs) of all six PGMs (denoted as <b>PGM-HEA</b>) having a great variety of adsorption sites on their surfaces could be ideal candidates to catalyze complex rea

We report the synthesis of high-entropy-alloy (HEA) nanoparticles (NPs) consisting of five platinum group metals (Ru, Rh, Pd, Ir and Pt) through a facile one-pot polyol process. We investigated the electronic structure of HEA NPs using hard X-ray photoelectron spectroscopy, which is the first direct observation of the electronic structure of HEA NPs. Significantly, the HEA NPs possessed a broad valence band spectrum without any obvious peaks. This implies that the HEA NPs have random atomic conf

Water is the only available fossil-free source of hydrogen. Splitting water electrochemically is among the most used techniques, however, it accounts for only 4% of global hydrogen production. One of the reasons is the high cost and low performance of catalysts promoting the oxygen evolution reaction (OER). Here, we report a highly efficient catalyst in acid, that is, solid-solution Ru‒Ir nanosized-coral (RuIr-NC) consisting of 3 nm-thick sheets with only 6 at.% Ir. Among OER catalysts, RuIr-NC

Pd and Ru are two key elements of the platinum-group metals that are invaluable to areas such as catalysis and energy storage/transfer. To maximize the potential of the Pd and Ru elements, significant effort has been devoted to synthesizing Pd-Ru bimetallic materials. However, most of the reports dealing with this subject describe phase-separated structures such as near-surface alloys and physical mixtures of monometallic nanoparticles (NPs). Pd-Ru alloys with homogenous structure and arbitrary

Abstract Both Pd and Ru are important elements in electrochemistry. However, Pd–Ru nanoparticle (NP) alloys are rarely reported so far, owing to the limitations described by Hume‐Rothery. Herein, we successfully synthesized Pd–Ru NP alloys over the whole composition range using a facile atomic‐diffusion‐based strategy, and we carefully investigated the corresponding formation mechanism. For the first time, we confined the size of all alloy NPs at 3–5 nm, which is favorable in direct formic acid

Aiming at investigating the effect of structure on electrocatalytic properties, Pd(50)Ru(50) nanoparticles (NPs) with three different structures were carefully designed in a one-pot polyol process for application in formic acid electrooxidation. The three structures are: (1) single-phase PdRu nanodendrites (denoted as PR-1), (2) a mixed-phase mixture of PdRu nanodendrites and monometallic Ru NPs (denoted as PR-2), and (3) a mixed-phase mixture of monometallic Pd and Ru NPs (denoted as PR-3). Fro

Earth-abundant 3<i>d</i>-orbital late transition metals are the most used and highly desired catalysts for the oxygen evolution reaction (OER) but are prone to quick oxidative dissolution, leading to poor durability. We first report that FeCoNiCu multielemental alloy nanoparticles (MEA NPs) can be stabilized with only 0.3 at. % Pd, a 4<i>d</i>-orbital element. Although pure Pd is known for extremely poor OER activity and durability, Pd-FeCoNiCu sustains 1000 h at 10 mA cm^-2. In an acc

{111}-Faceted Pd truncated triangular bipyramids (TTBPs) are first presented under the assistance of Ru. Attributed to their unique shape, the TTBPs are highly active and stable for formic acid oxidation. The electrochemical active surface area (ECSA) can be restored to its initial value after a harsh degradation test.