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Conventional strategies relying on external reductants suffer from drawbacks, such as radical self-quenching and secondary pollution. This study innovatively utilized electron-rich pollutants and H2O2 as dual electron donors to accelerate Fe\u00ad(III) reduction. Nitrogen-doped Ketjen Black (KB-N) was synthesized through pyrolysis modification using guanine, a nitrogen-rich compound with a conjugated structure, as the precursor. KB-N mediated electron transfer from electron-rich pollutants to Fe\u00ad(III) via its \u03c0\u2013\u03c0 conjugated network, while nitrogen active sites enhanced H2O2 adsorption and facilitated efficient electron extraction through a delocalized \u03c0-system for Fe\u00ad(III) reduction. More importantly, pyridinic N served as a key catalytic site that coordinates with Fe\u00ad(III), significantly elevating the oxidation potential of Fe\u00ad(III), thereby promoting H2O2 activation and reducing the reaction energy barrier. KB-N effectively mitigated the substrate specificity of pristine KB and substantially broadened the electron supply sources. This dual-channel electron transfer mechanism enabled efficient and stable Fe\u00ad(II) regeneration and enhanced contaminant degradation. In contrast to sacrificial electron donor strategies, this study proposed a clean electron transfer mechanism, offering a novel pathway for highly efficient, stable, and sustainable water treatment technologies.<\/jats:p>","DOI":"10.1021\/acs.est.5c08216","type":"journal-article","created":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T18:44:13Z","timestamp":1760035453000},"page":"22273-22284","source":"Crossref","is-referenced-by-count":9,"title":["Dual Source Electron\nTransfer Enabled by N\u2011Doped\nCarbon for Efficient Fe(III) Reduction"],"prefix":"10.1021","volume":"59","author":[{"given":"Zhengwei","family":"Zhou","sequence":"first","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, China, 200092"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guojie","family":"Ye","sequence":"additional","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, China, 200092"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chengsi","family":"Hou","sequence":"additional","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, China, 200092"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yue","family":"Wang","sequence":"additional","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, China, 200092"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3776-7382","authenticated-orcid":true,"given":"Yang","family":"Zong","sequence":"additional","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, China, 200092"]},{"name":"University of Science and Technology of China , , ,","place":["Hefei, China, 230026"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Longqian","family":"Xu","sequence":"additional","affiliation":[{"name":"Vanderbilt University , , , ,","place":["Nashville, Tennessee, United States, 37240"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhendong","family":"Lei","sequence":"additional","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, China, 200092"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8565-0779","authenticated-orcid":true,"given":"Deli","family":"Wu","sequence":"additional","affiliation":[{"name":"Tongji University , , ,","place":["Shanghai, China, 200092"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2025,10,9]]},"reference":[{"issue":"6","key":"2026081812164494700_cit1","doi-asserted-by":"publisher","first-page":"3316","DOI":"10.1021\/acs.est.4c12341","article-title":"Peroxide Directing the Iron Cycling for Tailored Generation of Active\nOxidants in Aqueous Fenton Reactions","volume":"59","author":"Li","year":"2025","journal-title":"Environ.\nSci. 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