AUTHOR=Wu Zexing , Wan Xiankai , Jin Wei , Fu Gengtao TITLE=Editorial: Carbon-Based Bifunctional Oxygen Electrocatalysts JOURNAL=Frontiers in Chemistry VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00713 DOI=10.3389/fchem.2020.00713 ISSN=2296-2646