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However, further reducing reaction energy consumption and releasing hydrogen from organic molecules continue to pose significant challenges. Herein, a strategy is proposed to produce hydrogen and formic acid from formaldehyde using Ag\/Co<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub> interface catalysts at the anode. The key to improving the performance of Ag\u2010based catalysts for formaldehyde oxidation lies in the strong SMSI achieved through the well\u2010designed \u201cspontaneous redox reaction\u201d between Ag and Co<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub> precursors. Nano\u2010sized Ag particles are uniformly dispersed on Co<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub> nanosheets, and electron\u2010deficient Ag<jats:sup>\u03b4+<\/jats:sup> are formed by the SMSI between Ag and Co<jats:sub>3<\/jats:sub>O<jats:sub>4.<\/jats:sub> Ag\/Co<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub> demonstrates exceptional formaldehyde oxidation activity at low potentials of 0.32\u00a0V versus RHE and 0.65\u00a0V versus RHE, achieving current densities of 10 and 100\u00a0mA cm<jats:sup>\u22122<\/jats:sup>, respectively. The electrolyzer \u201cAg\/Co<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub>||20% Pt\/C\u201d achieves over 195% hydrogen efficiency and over 98% formic acid selectivity, maintaining stable operation for 60 hours. This work not only presents a novel approach to precisely modulate Ag particle size and interface electronic structure via SMSI, but also provides a promising approach to efficient and energy\u2010saving hydrogen production and the transformation of harmful formaldehyde.<\/jats:p>","DOI":"10.1002\/smll.202405358","type":"journal-article","created":{"date-parts":[[2024,9,18]],"date-time":"2024-09-18T08:16:38Z","timestamp":1726647398000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Modulating Silver Performance in Electrocatalytic Oxidation of HCHO via SMSI between Ag\u2010Co<sub>3<\/sub>O<sub>4<\/sub> Interfaces"],"prefix":"10.1002","volume":"20","author":[{"given":"Peiyuan","family":"Mao","sequence":"first","affiliation":[{"name":"School of Chemistry State Key Laboratory of Fine Chemicals Dalian University of Technology  Dalian 116024 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