Atomically dispersed pentacoordinated-zirconium catalyst with axial oxygen ligand for oxygen reduction reaction

DOI: 10.1002/anie.202209746

Authors: Xia Wang (TU Dresden) , Yun An (TU Dresden) , Lifeng Liu (International Iberian Nanotechnology Laboratory, Clean Energy Cluster) , Lingzhe Fang (Northern Illinois University) , Yannan Liu (TU Dresden) , Jiaxu Zhang (TU Dresden) , Haoyuan Qi (University of Ulm) , Thomas Heine (TU Dresden) , Tao Li (Northern Illinois University) , Agnieszka Kuc (Helmholtz-Zentrum Dresden-Rossendorf) , Minghao Yu (TU Dresden) , Xinliang Feng (TU Dresden)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Angewandte Chemie International Edition

State: Published (Approved)
Published: July 2022
Diamond Proposal Number(s): 28688

Abstract: Single-atom catalysts (SACs), as promising alternatives to Pt-based catalysts, suffer from the limited choice of center metals and low single-atom loading. Here, we report a pentacoordinated Zr-based SAC with nontrivial axial O ligands (denoted O-Zr-N-C) for oxygen reduction reaction (ORR). The O ligand downshifts the d-band center of Zr and confers Zr sites with stable local structure and proper adsorption capability for intermediates. Consequently, the ORR performance of O-Zr-N-C prominently surpasses that of commercial Pt/C, achieving a half-wave potential of 0.91 V vs. reversible hydrogen electrode and outstanding durability (92% current retention after 130-hour operation). Moreover, the Zr site shows good resistance towards aggregation, enabling the synthesis of Zr-based SAC with high loading (9.1 wt%). With the high-loading catalyst, the zinc-air battery (ZAB) delivers a record-high power density of 324 mW cm−2 among those of SAC-based ZABs.

Journal Keywords: Single-atom catalysts; Oxygen reduction reaction; Pentacoordinated configuration; Zinc-air battery; High single- atom loading

Subject Areas: Chemistry, Energy


Instruments: B18-Core EXAFS

Added On: 15/07/2022 08:10

Documents:
Angew Chem Int Ed - 2022 - Wang - Atomically Dispersed Pentacoordinated%E2%80%90Zirconium Catalyst with Axial Oxygen Ligand for.pdf

Discipline Tags:

Energy Storage Energy Physical Chemistry Catalysis Chemistry

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS) Extended X-ray Absorption Fine Structure (EXAFS)