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Herein, we show organic amines (e.g.,\n                    <jats:italic>n<\/jats:italic>\n                    \u2010butylamine,\n                    <jats:italic>n<\/jats:italic>\n                    \u2010B) act as smart reductants for SCR systems. Unlike NH\n                    <jats:sub>3<\/jats:sub>\n                    ,\n                    <jats:italic>n<\/jats:italic>\n                    \u2010B reacts stoichiometrically with NO\n                    <jats:sub>x<\/jats:sub>\n                    and undergoes NO\u2010accelerated self\u2010elimination when overdosed over TiO\n                    <jats:sub>2<\/jats:sub>\n                    \u2010supported VO\n                    <jats:sub>x<\/jats:sub>\n                    catalysts. Mechanistic studies reveal Ti\u2500OH sites on the catalyst facilitate\n                    <jats:italic>n<\/jats:italic>\n                    \u2010B adsorption and activation, with the *NH\n                    <jats:sub>3<\/jats:sub>\n                    intermediate driving NO\n                    <jats:sub>x<\/jats:sub>\n                    reduction. *NH\n                    <jats:sub>2<\/jats:sub>\n                    from excess\n                    <jats:italic>n<\/jats:italic>\n                    \u2010B oxidizes to nitrites and NO\n                    <jats:sub>2<\/jats:sub>\n                    under NO+O\n                    <jats:sub>2<\/jats:sub>\n                    , which further react with *NH\n                    <jats:sub>3<\/jats:sub>\n                    via an internal SCR pathway, avoiding free NH\n                    <jats:sub>3<\/jats:sub>\n                    formation and slip. We propose a hybrid reductants system (NH\n                    <jats:sub>3<\/jats:sub>\n                    +\n                    <jats:italic>n<\/jats:italic>\n                    \u2010B) enabling efficient NH\n                    <jats:sub>3<\/jats:sub>\n                    slip suppression over a reductant\/NO\n                    <jats:sub>x<\/jats:sub>\n                    molar ratio of 1.2, providing a promising strategy without modifying existing SCR hardware or structures.\n                  <\/jats:p>","DOI":"10.1002\/anie.8855639","type":"journal-article","created":{"date-parts":[[2026,5,20]],"date-time":"2026-05-20T14:55:00Z","timestamp":1779288900000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Suppression of Ammonia Slip by Smart Reductants in Selective Catalytic Reduction of Nitrogen Oxides"],"prefix":"10.1002","volume":"65","author":[{"given":"Xiaoya","family":"Xue","sequence":"first","affiliation":[{"name":"Innovation Institute of Carbon Neutrality International Joint Laboratory of Catalytic Chemistry College of Sciences State Key Laboratory of Materials for Advanced Nuclear Energy Shanghai University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aling","family":"Chen","sequence":"additional","affiliation":[{"name":"Innovation Institute of Carbon Neutrality International Joint Laboratory of Catalytic Chemistry College of Sciences State Key Laboratory of Materials for Advanced Nuclear Energy Shanghai University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Liu","sequence":"additional","affiliation":[{"name":"Innovation Institute of Carbon Neutrality International Joint Laboratory of Catalytic Chemistry College of Sciences State Key Laboratory of Materials for Advanced Nuclear Energy Shanghai University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7666-2543","authenticated-orcid":false,"given":"Mzamo","family":"Shozi","sequence":"additional","affiliation":[{"name":"Discipline of Chemistry School of Agriculture and Science University of KwaZulu\u2010Natal  Durban South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaonan","family":"Hu","sequence":"additional","affiliation":[{"name":"Innovation Institute of Carbon Neutrality International Joint Laboratory of Catalytic Chemistry College of Sciences State Key Laboratory of Materials for Advanced Nuclear Energy Shanghai University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fuli","family":"Wang","sequence":"additional","affiliation":[{"name":"Innovation Institute of Carbon Neutrality International Joint Laboratory of Catalytic Chemistry College of Sciences State Key Laboratory of Materials for Advanced Nuclear Energy Shanghai University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming","family":"Xie","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering University of Bath  Bath UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenqiang","family":"Qu","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Toronto  Toronto Ontario Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7619-6228","authenticated-orcid":false,"given":"Jiang","family":"Deng","sequence":"additional","affiliation":[{"name":"Innovation Institute of Carbon Neutrality International Joint Laboratory of Catalytic Chemistry College of Sciences State Key Laboratory of Materials for Advanced Nuclear Energy Shanghai University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4280-0068","authenticated-orcid":false,"given":"Dengsong","family":"Zhang","sequence":"additional","affiliation":[{"name":"Innovation Institute of Carbon Neutrality International Joint Laboratory of Catalytic Chemistry College of Sciences State Key Laboratory of Materials for Advanced Nuclear Energy Shanghai University  Shanghai 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