Pd-Pt Tesseracts for the Oxygen Reduction Reaction.

Impact Factor:

15.419

DOI number:

10.1021/jacs.0c12282

Journal:

J. Am. Chem. Soc.

Key Words:

Binary alloys, Composition effects, Electrolytic reduction, Etching, Gas adsorption, Oxygen, Oxygen reduction reaction, Structural frames, Body diagonals, Efficient catalysts, Etching process, Frame structure, High activity, Mechanistic studies, Oxygen adsorption, Selective removal, Palladium, nanocrystal, nanocube, platinum, adsorption, Article, catalyst, chemical composition, chemical structure, density functional theory, electrochemical analysis, energy dispersive X ray spectroscopy, four-dimensional imaging, high resolution transmission electron microscopy, inductively coupled plasma atomic emission spectrometry, oxidation reduction reaction, reaction analysis, scanning transmission electron microscopy, X ray powder diffraction

Abstract:

Hollow frame structures are of special interest in the realm of catalysis since they hold only ridges and hollow interiors, enabling the accessibility of active sites to the most extent. Herein, we prepared Pd-Pt hollow frame structures composed of double-shell cubes linked by body diagonals as an efficient catalyst toward the oxygen reduction reaction (ORR), inspired by the 4D analogue of a cube, denoted as a tesseract. The etching process involves the selective removal of Pd atoms and the subsequent rearrangement of the remaining Pd and Pt atoms. The successful preparation of Pd-Pt tesseracts via etching lies in the selection of Pd/Pt ratio in the initial Pd-Pt nanocubes. With various ratios of Pd-Pt nanocubes as templates, we obtained Pd-Pt octapods, tesseracts, and nanoframes, respectively. During the ORR, Pd-Pt tesseracts exhibited the highest mass activity of 1.86 A mg(Pt)(-1), among these Pd-Pt nanocrystals. On the basis of mechanistic studies, the high activity of Pd-Pt tesseracts derived from the optimal oxygen adsorption energy due to the facet effect and composition effect.

Co-author:

Jiankang Zhao, Hongyang Su, Hongliang Li, Huili Wang, Zhenpeng Hu

First Author:

Sheng Chen

Correspondence Author:

Jun Bao, Jie Zeng

Document Type:

SCI

Volume:

143

Issue:

1

Page Number:

496-503

Translation or Not:

no

Date of Publication:

2021-01-01

Links to published journals:

https://pubs.acs.org/doi/abs/10.1021/jacs.0c12282