@article{834e565719104c9ba44a387ec849dc28,
title = "Boosting oxygen evolution reaction by activation of lattice-oxygen sites in layered Ruddlesden-Popper oxide",
abstract = "Emerging anionic redox chemistry presents new opportunities for enhancing oxygen evolution reaction (OER) activity considering that lattice-oxygen oxidation mechanism (LOM) could bypass thermodynamic limitation of conventional metal-ion participation mechanism. Thus, finding an effective method to activate lattice-oxygen in metal oxides is highly attractive for designing efficient OER electrocatalysts. Here, we discover that the lattice-oxygen sites in Ruddlesden-Popper (RP) crystal structure can be activated, leading to a new class of extremely active OER catalyst. As a proof-of-concept, the RP Sr3(Co0.8Fe0.1Nb0.1)2O7-δ (RP-SCFN) oxide exhibits outstanding OER activity (eg, 334 mV at 10 mA cm−2 in 0.1 M KOH), which is significantly higher than that of the simple SrCo0.8Fe0.1Nb0.1O3-δ perovskite and benchmark RuO2. Combined density functional theory and X-ray absorption spectroscopy studies demonstrate that RP-SCFN follows the LOM under OER condition, and the activated lattice oxygen sites triggered by high covalency of metal-oxygen bonds are the origin of the high catalytic activity. (Figure presented.).",
keywords = "anion activation, lattice-oxygen sites, oxygen evolution reaction, Ruddlesden-Popper oxide, structure engineering",
author = "Yinlong Zhu and Tahini, {Hassan A.} and Zhiwei Hu and Yichun Yin and Qian Lin and Hainan Sun and Yijun Zhong and Yubo Chen and Feifei Zhang and Hong-Ji Lin and Chien-Te Chen and Wei Zhou and Xiwang Zhang and Smith, {Sean C.} and Zongping Shao and Huanting Wang",
note = "Funding Information: This work was financially supported by the Australian Research Council (Discovery Early Career Researcher Award No. DE190100005). Computational work was supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian National Computational and the Government of Western Australia. We acknowledge support from the Max Planck-POSTECH-Hsinchu Center for Complex Phase Materials and the staff of Monash Center for Electron Microscopy. Funding Information: This work was financially supported by the Australian Research Council (Discovery Early Career Researcher Award No. DE190100005). Computational work was supported by resources provided by the Pawsey Supercomputing Centre with funding from the Australian National Computational and the Government of Western Australia. We acknowledge support from the Max Planck‐POSTECH‐Hsinchu Center for Complex Phase Materials and the staff of Monash Center for Electron Microscopy. Publisher Copyright: {\textcopyright} 2020 The Authors. EcoMat published by The Hong Kong Polytechnic University and John Wiley & Sons Australia, Ltd.",
year = "2020",
month = jun,
doi = "10.1002/eom2.12021",
language = "English",
volume = "2",
journal = "EcoMat",
issn = "2567-3173",
publisher = "John Wiley & Sons",
number = "2",
}