Atom trapping is a well-established route to prepare single-atom catalysts. Here the authors propose a reverse atom-trapping strategy in which surface strontium atoms of LSCF fuel cell cathodes are extracted by MoO3, forming single strontium vacancies on LSCF in a controllable manner and tuning its performance for the oxygen reduction reaction.
- Zechao Zhuang
- Yihang Li
- Yadong Li
