@article{Liu2023, 
author = {Xuan Liu and Siru Chen and Huicheng Wang and Anmin Liu and Shizheng Wen and Liwei Mi and Yanqiang Li},
title = {Lattice confined Ru single sites in hollow Co9S8 polyhedron triggering Co-S-Ru catalytic centers for rechargeable Zn-air battery},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {5},
pages = {6701-6709},
keywords = {electrocatalysis, bifunctional catalysts, Zn-air battery, single-atom catalysts, lattice confinement},
url = {https://www.sciopen.com/article/10.1007/s12274-023-5469-5},
doi = {10.1007/s12274-023-5469-5},
abstract = {Single-atom catalysts with precise structure and tunable coordination nature provide opportunities for developing novel catalytic centers and understanding reaction mechanisms. Herein, hollow Co9S8 polyhedrons with lattice-confined Ru single atoms (Ru-Co9S8) are fabricated. Aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy verify the isolated Ru atoms are confined in Co9S8 to form Co-S-Ru catalytic centers. Theoretical calculations indicate that the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) energy barriers are extensively reduced, and the d-band center of Co9S8 downshifts from the Fermi level, therefore boosting the desorption of O-containing intermediates. Consequently, the Ru-Co9S8 exhibits an ultralow overpotential of 163 mV at 10 mA·cm−2 for OER and could catalyze a rechargeable Zn-air battery with a high-power density of 92.0 mW·cm−2. This work provides a promising approach for designing novel bifunctional catalytic active centers for energy conversion.}
}