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1520-510X62222023Jun05Inorganic chemistryInorg ChemLimitation of WO3 in Zn-Co3O4 Nanopolyhedra by the Pyrolysis of H3PW12O40@BMZIF: Synergistic Effect of Heterostructure and Oxygen Vacancies for Enhanced Nitrogen Fixation.871087188710-871810.1021/acs.inorgchem.3c01016The photocatalytic nitrogen fixation process is a crucial step toward carbon neutrality and sustainable development. The combination of polyoxometalates and metal-organic frameworks is a viable method to achieve high-efficiency photocatalytic nitrogen fixation. In this work, we employed bimetallic ZIF (BMZIF) composed of Co2+ and Zn2+ encapsulated with H3PW12O40 (PW12) as the precursor to synthesize Zn-doped Co3O4 nanopolyhedra loaded with WO3 nanoparticles. The NH3 yield of WO3/Zn-Co3O4-2 with the best photocatalytic performance can reach 231.9 μmol g-1 h-1 under visible light, about 2.4 and 6.4 times those of pure Zn-Co3O4 and WO3, respectively. The rhombic dodecahedral geometry of BMZIF is still maintained in the synthesized WO3/Zn-Co3O4 nanopolyhedra, with the significant increase in the specific surface area after calcination showing better catalytic performance. At the same time, Zn doping and the formation of WO3 nanoparticles result in abundant oxygen vacancies in WO3/Zn-Co3O4 heterostructures. Oxygen vacancies can supply nitrogen with active sites for adsorption and activation and improve photocarriers' capacity for separation, which can greatly increase the effectiveness of the photocatalytic synthesis of ammonia. This work can easily synthesize the heterostructure based on n-type WO3 nanoparticles and p-type Zn-doped Co3O4 nanopolyhedra, and the beneficial combination of POMs and metal-organic framework provides new thinking for the synthesis of efficient nitrogen-fixing photocatalysts.YangXueXKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.LiMohanMKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.XuLinL0000-0002-8967-919XKey Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.LiFengyanF0000-0003-0167-4114Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.engJournal Article20230522
United StatesInorg Chem03665430020-1669IM
202352364320235236422023523337ppublish3721814810.1021/acs.inorgchem.3c01016
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10587501MCID_676f0859c511c9a59a07d6b1 39729147 39725643 39725141 39724855 39722789 oxygen "cell respiration"[MeSH Terms] OR ("cell"[All Fields] AND "respiration"[All Fields]) OR "cell respiration"[All Fields] OR "oxygenation"[All Fields] OR "oxygen"[MeSH Terms] OR "oxygen"[All Fields] OR "oxygen's"[All Fields] OR "oxygenate"[All Fields] OR "oxygenated"[All Fields] OR "oxygenates"[All Fields] OR "oxygenating"[All Fields] OR "oxygenations"[All Fields] OR "oxygenative"[All Fields] OR "oxygenator's"[All Fields] OR "oxygenators"[MeSH Terms] OR "oxygenators"[All Fields] OR "oxygenator"[All Fields] OR "oxygene"[All Fields] OR "oxygenic"[All Fields] OR "oxygenous"[All Fields] OR "oxygens"[All Fields] vacancies "vacancies"[All Fields] OR "vacancy"[All Fields] ("cell respiration"[MeSH Terms] OR ("cell"[All Fields] AND "respiration"[All Fields]) OR "cell respiration"[All Fields] OR "oxygenation"[All Fields] OR "oxygen"[MeSH Terms] OR "oxygen"[All Fields] OR "oxygen s"[All Fields] OR "oxygenate"[All Fields] OR "oxygenated"[All Fields] OR "oxygenates"[All Fields] OR "oxygenating"[All Fields] OR "oxygenations"[All Fields] OR "oxygenative"[All Fields] OR "oxygenator s"[All Fields] OR "oxygenators"[MeSH Terms] OR "oxygenators"[All Fields] OR "oxygenator"[All Fields] OR "oxygene"[All Fields] OR "oxygenic"[All Fields] OR "oxygenous"[All Fields] OR "oxygens"[All Fields]) AND ("vacancies"[All Fields] OR "vacancy"[All Fields]) trying2...
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Limitation of WO in Zn-CoO Nanopolyhedra by the Pyrolysis of HPWO@BMZIF: Synergistic Effect of Heterostructure and Oxygen Vacancies for Enhanced Nitrogen Fixation. | LitMetric

Limitation of WO in Zn-CoO Nanopolyhedra by the Pyrolysis of HPWO@BMZIF: Synergistic Effect of Heterostructure and Oxygen Vacancies for Enhanced Nitrogen Fixation.

Inorg Chem

Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.

Published: June 2023

The photocatalytic nitrogen fixation process is a crucial step toward carbon neutrality and sustainable development. The combination of polyoxometalates and metal-organic frameworks is a viable method to achieve high-efficiency photocatalytic nitrogen fixation. In this work, we employed bimetallic ZIF (BMZIF) composed of Co and Zn encapsulated with HPWO (PW) as the precursor to synthesize Zn-doped CoO nanopolyhedra loaded with WO nanoparticles. The NH yield of WO/Zn-CoO-2 with the best photocatalytic performance can reach 231.9 μmol g h under visible light, about 2.4 and 6.4 times those of pure Zn-CoO and WO, respectively. The rhombic dodecahedral geometry of BMZIF is still maintained in the synthesized WO/Zn-CoO nanopolyhedra, with the significant increase in the specific surface area after calcination showing better catalytic performance. At the same time, Zn doping and the formation of WO nanoparticles result in abundant oxygen vacancies in WO/Zn-CoO heterostructures. Oxygen vacancies can supply nitrogen with active sites for adsorption and activation and improve photocarriers' capacity for separation, which can greatly increase the effectiveness of the photocatalytic synthesis of ammonia. This work can easily synthesize the heterostructure based on n-type WO nanoparticles and p-type Zn-doped CoO nanopolyhedra, and the beneficial combination of POMs and metal-organic framework provides new thinking for the synthesis of efficient nitrogen-fixing photocatalysts.

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http://dx.doi.org/10.1021/acs.inorgchem.3c01016DOI Listing

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