{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,18]],"date-time":"2026-02-18T02:39:31Z","timestamp":1771382371743,"version":"3.50.1"},"reference-count":93,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2021,11,27]],"date-time":"2021-11-27T00:00:00Z","timestamp":1637971200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/50011\/2020 & UIDP\/50011\/2020"],"award-info":[{"award-number":["UIDB\/50011\/2020 & UIDP\/50011\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","doi-asserted-by":"publisher","award":["Project POCI-01-0145-FEDER-030075 (COMPETE 2020 Operational Thematic Program for Com-petitiveness and Internationalization) co-financed by national funds through the FCT\/MCTES and the European Union through the European Regional Development Fund under the"],"award-info":[{"award-number":["Project POCI-01-0145-FEDER-030075 (COMPETE 2020 Operational Thematic Program for Com-petitiveness and Internationalization) co-financed by national funds through the FCT\/MCTES and the European Union through the European Regional Development Fund under the"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Portuguese Foundation for Science and Technology\/MCTES","award":["M.M.A. and A.F. were funded by national funds (OE), through FCT, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of article 23 of the Decree-Law 57\/2016 of 29 August, changed by Law 57\/2017 of 19 July."],"award-info":[{"award-number":["M.M.A. and A.F. were funded by national funds (OE), through FCT, I.P., in the scope of the framework contract foreseen in the numbers 4, 5 and 6 of article 23 of the Decree-Law 57\/2016 of 29 August, changed by Law 57\/2017 of 19 July."]}]},{"name":"FEDER through COMPETE 2020, POCI and PORL and FCT through PIDDAC","award":["NMR spectrometer used is part of the National NMR Network (PTNMR) and is partially sup-ported by Infrastructure Project N\u00ba 022161"],"award-info":[{"award-number":["NMR spectrometer used is part of the National NMR Network (PTNMR) and is partially sup-ported by Infrastructure Project N\u00ba 022161"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Heterogeneous catalysis, which has served well the petrochemical industry, may valuably contribute towards a bio-based economy by sustainably enabling selective reactions to renewable chemicals. Carbohydrate-containing matter may be obtained from various widespread sources and selectively converted to furanic platform chemicals: furfural (Fur) and 5-(hydroxymethyl)furfural (Hmf). Valuable bioproducts may be obtained from these aldehydes via catalytic transfer hydrogenation (CTH) using alcohols as H-donors under relatively moderate reaction conditions. Hafnium-containing TUD-1 type catalysts were the first of ordered mesoporous silicates explored for the conversion of Fur and Hmf via CTH\/alcohol strategies. The materials promoted CTH and acid reactions leading to the furanic ethers. The bioproducts spectrum was broader for the reaction of Fur than of Hmf. A Fur reaction mechanism based on literature data was discussed and supported by kinetic modelling. The influence of the Hf loading and reaction conditions (catalyst load, type of alcohol H-donor, temperature, initial substrate concentration) on the reaction kinetics was studied. The reaction conditions were optimized to maximize the yields of 2-(alkoxymethyl)furan ethers formed from Fur; up to 63% yield was reached at 88% Fur conversion, 4 h\/150 \u00b0C, using Hf-TUD-1(75), which was a stable catalyst. The Hf-TUD-1(x) catalysts promoted the selective conversion of Hmf to bis(2-alkoxymethyl)furan; e.g., 96% selectivity at 98% Hmf conversion, 3 h\/170 \u00b0C for Hf-TUD-1(50).<\/jats:p>","DOI":"10.3390\/molecules26237203","type":"journal-article","created":{"date-parts":[[2021,11,30]],"date-time":"2021-11-30T22:01:11Z","timestamp":1638309671000},"page":"7203","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Catalytic Transfer Hydrogenation and Acid Reactions of Furfural and 5-(Hydroxymethyl)furfural over Hf-TUD-1 Type Catalysts"],"prefix":"10.3390","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5888-2278","authenticated-orcid":false,"given":"Margarida M.","family":"Antunes","sequence":"first","affiliation":[{"name":"Department of Chemistry, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Andreia F.","family":"Silva","sequence":"additional","affiliation":[{"name":"Department of Chemistry, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Carolina D.","family":"Bernardino","sequence":"additional","affiliation":[{"name":"Department of Chemistry, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"given":"Auguste","family":"Fernandes","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9538-821X","authenticated-orcid":false,"given":"Filipa","family":"Ribeiro","sequence":"additional","affiliation":[{"name":"Centro de Qu\u00edmica Estrutural, Instituto Superior T\u00e9cnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3495-2133","authenticated-orcid":false,"given":"Anabela A.","family":"Valente","sequence":"additional","affiliation":[{"name":"Department of Chemistry, CICECO\u2014Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,27]]},"reference":[{"key":"ref_1","unstructured":"EPA-United States Environmental Protection Agency (2021, October 20). Overview of Greenhouse Gases, Available online: https:\/\/www.epa.gov\/ghgemissions\/overview-greenhouse-gases."},{"key":"ref_2","unstructured":"Lindsey, R. (2021, October 20). 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