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However, achieving high S\n                    <jats:sub>8<\/jats:sub>\n                    selectivity is challenging due to the competing hydrogen evolution reaction (HER). Here, Co\u2010cluster\/atom ensembles (Co\n                    <jats:sub>C\/SA<\/jats:sub>\n                    \u2010NC) were designed and attempted for the first time to achieve highly selective electrocatalytic conversion of SO\n                    <jats:sub>2<\/jats:sub>\n                    to S\n                    <jats:sub>8<\/jats:sub>\n                    . Theoretical calculations have predicted that Co\n                    <jats:sub>C\/SA<\/jats:sub>\n                    \u2010NC possesses stronger SO\n                    <jats:sub>2<\/jats:sub>\n                    adsorption and enhances proton diffusion into SO\n                    <jats:sub>2<\/jats:sub>\n                    for SO\n                    <jats:sub>2<\/jats:sub>\n                    RR promotion. As expected, Co\n                    <jats:sub>C\/SA<\/jats:sub>\n                    \u2010NC experimentally facilitated SO\n                    <jats:sub>2<\/jats:sub>\n                    \u2010to\u2010S\n                    <jats:sub>8<\/jats:sub>\n                    conversion through efficient hydrogenation and polymerisation, and created a local proton\u2010deficient micro\u2010environment to suppress HER. Consequently, the Co\n                    <jats:sub>C\/SA<\/jats:sub>\n                    \u2010NC ensembles attained a high Faradaic efficiency of 87% and a remarkable S\n                    <jats:sub>8<\/jats:sub>\n                    yield of 2802.6\u00a0\u00b5mol mg\n                    <jats:sup>\u22121<\/jats:sup>\n                    h\n                    <jats:sup>\u22121<\/jats:sup>\n                    . This performance considerably exceeds that of both commercial Pt@C (62%, 2007.2\u00a0\u00b5mol mg\n                    <jats:sup>\u22121<\/jats:sup>\n                    h\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) and control NC (54%, 898.3\u00a0\u00b5mol mg\n                    <jats:sup>\u22121<\/jats:sup>\n                    h\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) catalysts. Furthermore, the CoN\n                    <jats:sub>4<\/jats:sub>\n                    atomic sites and Co clusters collaboratively reduce the affinity for S\n                    <jats:sub>8<\/jats:sub>\n                    and produce a desulfurization interface that mitigates electrode passivation and improves catalyst stability, resulting in a potential retention of 80.5% after 7\u2010cycles. This study provides valuable insight into tailoring the interfacial microenvironment using atom\/cluster ensembles for efficient electrocatalytic S\n                    <jats:sub>8<\/jats:sub>\n                    synthesis from SO\n                    <jats:sub>2<\/jats:sub>\n                    .\n                  <\/jats:p>","DOI":"10.1002\/smll.74028","type":"journal-article","created":{"date-parts":[[2026,5,30]],"date-time":"2026-05-30T10:51:06Z","timestamp":1780138266000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Engineering Proton\u2010Deficient Micro\u2010Environments on Co\u2010cluster\/atom Ensembles for Efficient Cyclooctasulfur Electrosynthesis From Sulfur Dioxide"],"prefix":"10.1002","volume":"22","author":[{"given":"Lili","family":"He","sequence":"first","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yi","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2637-7207","authenticated-orcid":false,"given":"Jun","family":"Luo","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yixuan","family":"Deng","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peng","family":"Yue","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guoqiang","family":"Zou","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongshuai","family":"Hou","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiugang","family":"Hu","sequence":"additional","affiliation":[{"name":"College of Chemistry and Chemical Engineering Central South University  Changsha P. R. 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