Work

Trimetallic Pd@PtxAu1−x Core-Shell Nanocubes with Enhanced Selectivity toward H2O2 for the Oxygen Reduction Reaction

Year: 2025

Type: article

Abstract: We report a versatile method based on seed-mediated growth for the facile synthesis of trimetallic Pd@PtxAu1−x core-shell nanocubes. By simply varying the feeding ratio between the Pt(II) and Au(III) precursors, the atomic ratio of Pt to Au in the shell and thereby the ensemble state of Pt atoms on the surface can be tuned to control the binding configuration of O2 molecules. Specifically, discrete Pt atoms on the surface promote the adsorption of O2 molecules in the Pauling configuration to enhance the catalytic selectivity of the nanoparticles toward H2O2 via the two-electron oxygen reduction reaction, with the [email protected] nanocubes showing selectivity as high as 91% at 0.45 VRHE. This work offers a viable means to augment the electrocatalytic performance of alloy nanocrystals by controlling their surface compositions.

Source: Materials and Interfaces

DOI: 10.53941/mi.2025.100031

Authors: Zhiqi Wang, Kei Kwan Li, Yong Ding, Younan Xia

Institutions: Georgia Institute of Technology, Emory University, The Wallace H. Coulter Department of Biomedical Engineering

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

Open Access status: diamond

Funders: National Science Foundation, Georgia Institute of Technology

Award: High-Entropy Alloy Nanocrystals with Controlled Compositions and Surface Structures