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In this study, a Sn\/B\n                    <jats:sub>4<\/jats:sub>\n                    C composite catalyst was constructed via low\u2010temperature pyrolysis under a hydrogen atmosphere. The optimized Sn\/B\n                    <jats:sub>4<\/jats:sub>\n                    C\u20103 exhibited excellent 2e\n                    <jats:sup>\u2212<\/jats:sup>\n                    ORR performance, achieving 93.69% H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    selectivity in 0.1\u00a0M KOH and 91.9% selectivity in 0.05\u00a0M Na\n                    <jats:sub>2<\/jats:sub>\n                    SO\n                    <jats:sub>4<\/jats:sub>\n                    in RRDE measurements. In a neutral flow cell, the Sn\/B\n                    <jats:sub>4<\/jats:sub>\n                    C\u20103 delivered an H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    production rate of 13.33\u00a0mol g\n                    <jats:sub>cat<\/jats:sub>\n                    <jats:sup>\u22121<\/jats:sup>\n                    h\n                    <jats:sup>\u22121<\/jats:sup>\n                    with a Faradaic efficiency of 91.38%, and maintained operation for 130\u00a0h. XPS and in situ ATR\u2010SEIRAS analyses reveal that electron transfer from B\n                    <jats:sub>4<\/jats:sub>\n                    C to Sn generates electron\u2010rich Sn centers, which optimally modulate the adsorption energy of the key *OOH intermediate. DFT calculations confirm that these centers lower the energy barrier for H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    formation and enable optimal *OOH binding, thereby steering the pathway toward selective 2e\n                    <jats:sup>\u2212<\/jats:sup>\n                    ORR. The catalyst maintained stable performance over 130\u00a0h of continuous operation in a flow cell. Furthermore, the in situ generated H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    solution inactivated\n                    <jats:italic>Escherichia coli<\/jats:italic>\n                    and\n                    <jats:italic>Streptomyces griseus<\/jats:italic>\n                    within 40\u00a0min, achieving 99% sterilization efficiency. This study introduces an innovative design principle for electrocatalysts based on metal\u2010carbide synergy, promoting sustainable H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    production for applications such as microbial disinfection.\n                  <\/jats:p>","DOI":"10.1002\/smll.74633","type":"journal-article","created":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T09:17:18Z","timestamp":1785230238000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Electron Injection From B\n                    <sub>4<\/sub>\n                    C to Sn Sites Optimizes *OOH Adsorption Enabling Efficient H\n                    <sub>2<\/sub>\n                    O\n                    <sub>2<\/sub>\n                    Electrosynthesis"],"prefix":"10.1002","volume":"22","author":[{"given":"Haochong","family":"Zhong","sequence":"first","affiliation":[{"name":"State Key Laboratory of Green Chemical Synthesis and Conversion Zhejiang Key Laboratory of Surface and Interface Science and Engineering for Catalysts College of Chemical Engineering Zhejiang University of Technology  Hangzhou People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinglei","family":"Si","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green Chemical Synthesis and Conversion Zhejiang Key Laboratory of Surface and Interface Science and Engineering for Catalysts College of Chemical Engineering Zhejiang University of Technology  Hangzhou People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuanan","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green Chemical Synthesis and Conversion Zhejiang Key Laboratory of Surface and Interface Science and Engineering for Catalysts College of Chemical Engineering Zhejiang University of Technology  Hangzhou People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yabing","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green Chemical Synthesis and Conversion Zhejiang Key Laboratory of Surface and Interface Science and Engineering for Catalysts College of Chemical Engineering Zhejiang University of Technology  Hangzhou People's Republic of China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tianhang","family":"Lu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Green Chemical Synthesis and Conversion Zhejiang Key Laboratory of Surface and Interface Science and Engineering for Catalysts College of Chemical Engineering Zhejiang University of Technology  Hangzhou People's Republic of 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