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A series of 3D Au\u2010Ce<jats:italic> <jats:sub>x<\/jats:sub><\/jats:italic>Co<jats:italic><jats:sub>y<\/jats:sub><\/jats:italic>\/graphene aerogel (GA) composites is then fabricated by a facile heating method. The obtained catalysts possess a well\u2010defined structure of ordered arrays of nanotubes and good performance in formaldehyde (HCHO) oxidation. The composition and surface elemental valence states of the catalysts are modulated by the Ce\/Co molar ratio. The Au\u2010Ce<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic>Co<jats:italic><jats:sub>y<\/jats:sub><\/jats:italic> catalyst and graphene oxide sheets are well compounded within 60 s through a diamine cross\u2010linker to form 3D Au\u2010Ce<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic>Co<jats:italic><jats:sub>y<\/jats:sub><\/jats:italic>\/GA composites. In addition, the resulting catalyst of 3 wt% Au\u2010Ce<jats:sub>3<\/jats:sub>Co\/GA achieves \u224855% conversion at room temperature and 100% conversion when the reaction temperature is raised at 60 \u00b0C. The synergistic effect between CeO<jats:sub>2<\/jats:sub> and Co<jats:sub>3<\/jats:sub>O<jats:sub>4<\/jats:sub> promotes the migration of oxygen species and the activation of Au, which facilitates HCHO oxidation. The method used to prepare the 3D catalyst could be used to produce other catalytic materials with good replication of the template. In addition, these findings provide a simple method for rapid fabrication of catalyst\/GA composites. The superior activity and stability of the 3D Au\u2010Ce<jats:sub>3<\/jats:sub>Co\/GA catalyst make it potentially applicable in HCHO removal.<\/jats:p>","DOI":"10.1002\/smll.201804415","type":"journal-article","created":{"date-parts":[[2018,12,7]],"date-time":"2018-12-07T16:47:19Z","timestamp":1544201239000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":43,"title":["3D Gold\u2010Modified Cerium and Cobalt Oxide Catalyst on a Graphene Aerogel for Highly Efficient Catalytic Formaldehyde Oxidation"],"prefix":"10.1002","volume":"15","author":[{"given":"Jiafu","family":"Qu","sequence":"first","affiliation":[{"name":"Collaborative Innovation Center of Suzhou Nano Science and Technology College of Chemistry, Chemical Engineering and Materials ScienceSoochow University  199 Ren'ai Road Suzhou 215123 P.R. 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