Center of Super-Diamond and Advanced Films (COSDAF); Department of Materials Science and Engineering; City University of Hong Kong; Tat Chee Avenue Kowloon Hong Kong China
Centre for Clean Environment and Energy; Gold Coast Campus; Griffith University; Queensland 4222 Australia
Department of Chemistry; Institute for Advanced Study; Institute of Molecular Functional Materials and Division of Biomedical Engineering; The Hong Kong University of Science & Technology; Clear Water Bay Kowloon Hong Kong China
Shanghai Synchrotron Radiation Facility; Shanghai Institute of Applied Physics; Chinese Academy of Sciences; Shanghai 201800 China
Center of Super-Diamond and Advanced Films (COSDAF) & Department of Chemistry; City University of Hong Kong; Tat Chee Avenue Kowloon Hong Kong China
In article number 1803144, Huijun Zhao, Wenjun Zhang, and co‐workers synthesize ultrathin δ‐FeOOH nanosheets with rich Fe‐vacancies grown on Ni foam, and propose an iron‐vacancy‐based catalyst activation principle to induce water‐splitting bifunctionality. The formation of the second neighboring Fe to the Fe vacancies in the δ‐FeOOH nanosheets can create active centers for both the hydrogen and the oxygen evolution reaction.