{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,11]],"date-time":"2026-05-11T06:20:22Z","timestamp":1778480422731,"version":"3.51.4"},"reference-count":57,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2019,7,20]],"date-time":"2019-07-20T00:00:00Z","timestamp":1563580800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>Most studies on the Cu-based catalysts in the ethynylation of formaldehyde are merely focused on the tuning of electronic configuration and dispersion of the Cu+ species. So far, little attention has been paid to the synergy between Cu species and promoters. Herein, binary nano-CuO-MOx catalysts (M = Si, Al, and Mg) were synthesized and the effects of the promoter on the surface basicity\/acidity were systematically studied as well as the ethynylation performance of the nano-CuO-based catalysts. The results show that the introduction of MgO provided a large number of basic sites, which could coordinate with the active Cu+ species and facilitate the dissociation of acetylene as HC\u2261C\u03b4\u2212 and H\u03b4+. The strongly nucleophilic acetylenic carbon (HC\u2261C\u03b4\u2212) is favorable to the attack at the electropositive carbonyl C\u03b4+ of formaldehyde. The MgO-promoted CuO catalyst showed the highest yield of BD (94%) and the highest stability (the BD yield decreased only from 94% to 82% after eight reaction cycles). SiO2 effectively dispersed Cu species, which improved catalytic activity and stability. However, the introduction of Al2O3 resulted in a large number of acidic sites on the catalyst\u2019s surface. This led to the polymerization of acetylene, which covered the active sites and decreased the catalyst\u2019s activity.<\/jats:p>","DOI":"10.3390\/nano9071038","type":"journal-article","created":{"date-parts":[[2019,7,22]],"date-time":"2019-07-22T02:55:37Z","timestamp":1563764137000},"page":"1038","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Ethynylation of Formaldehyde over Binary Cu-Based Catalysts: Study on Synergistic Effect between Cu+ Species and Acid\/Base Sites"],"prefix":"10.3390","volume":"9","author":[{"given":"Zhipeng","family":"Wang","sequence":"first","affiliation":[{"name":"Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lijun","family":"Ban","sequence":"additional","affiliation":[{"name":"Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pingfan","family":"Meng","sequence":"additional","affiliation":[{"name":"Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3740-571X","authenticated-orcid":false,"given":"Haitao","family":"Li","sequence":"additional","affiliation":[{"name":"Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yongxiang","family":"Zhao","sequence":"additional","affiliation":[{"name":"Engineering Research Center of Ministry of Education for Fine Chemicals, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1145","DOI":"10.1007\/s11244-010-9550-4","article-title":"Selective hydrogenation of 2-butyne-1,4-diol to 1,4-butanediol over particulate Raney\u00ae nickel catalysts","volume":"53","author":"Tanielyan","year":"2010","journal-title":"Top. 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C"}],"container-title":["Nanomaterials"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2079-4991\/9\/7\/1038\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T13:07:52Z","timestamp":1760188072000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2079-4991\/9\/7\/1038"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2019,7,20]]},"references-count":57,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2019,7]]}},"alternative-id":["nano9071038"],"URL":"https:\/\/doi.org\/10.3390\/nano9071038","relation":{},"ISSN":["2079-4991"],"issn-type":[{"value":"2079-4991","type":"electronic"}],"subject":[],"published":{"date-parts":[[2019,7,20]]}}}