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Here, we propose that a single\u2013component photocatalyst can be regarded as a generalized heterojunction by dividing it into multiple spatially independent segments with different electronic properties. We prepared a conjugated polymer (CN-K\/SC) with significant intramolecular charge inhomogeneity by functionalizing sulfonyl cyanide (SC) groups onto carbon nitride (CN) using the facile KSCN molten salt method. This inhomogeneity generates a strong BIEF that drives directional migration of photogenerated carriers. Kelvin probe force microscopy (KPFM), In situ X-ray photoelectron spectroscopy (In situ XPS), and theoretical calculations collectively reveal the complex dynamics of photogenerated carriers. CN-K\/SC was divided into three spatially adjacent regions with comparable excitation energies through excited-state calculations and spatial charge distribution analysis. Under the BIEF, these regions interact synergistically to establish a dual Z-scheme-like electron transfer pathway. This pathway enhances charge separation efficiency and boosts the photocatalytic H2O2 production (PHP) rate (approximately 28 times that of the pristine CN). This work establishes a universal segment-based framework that treats monomeric photocatalysts as generalized heterojunctions, providing insights for a thorough examination of their unique intramolecular carrier dynamics.<\/jats:p>","DOI":"10.1021\/acsami.6c17325","type":"journal-article","created":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T20:02:33Z","timestamp":1790280153000},"page":"53572-53585","source":"Crossref","is-referenced-by-count":0,"title":["Segment-Resolved Intramolecular Dual Z-Scheme-Like Electron Transfer Driven by Built-in Electric Field in a Monomeric Photocatalyst for Efficient Photocatalytic H2O2 Production"],"prefix":"10.1021","volume":"18","author":[{"given":"Shenao","family":"Wang","sequence":"first","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Renhe","family":"Li","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aijia","family":"Zhang","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingya","family":"Huang","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuyan","family":"Qi","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Linzhi","family":"Ran","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2198-2421","authenticated-orcid":true,"given":"Jun","family":"Luo","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4561-4711","authenticated-orcid":true,"given":"Bingsuo","family":"Zou","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,9,24]]},"reference":[{"key":"2026100705065882400_cit1","doi-asserted-by":"publisher","DOI":"10.1002\/anie.202508718","article-title":"Recyclable Quasi-Homogeneous Carbon Nitride Colloidal Catalyst for Sustainable Photocatalytic H2O2 Generation","volume":"64","author":"Liu","year":"2025","journal-title":"Angew. 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