Bo-rasaense ba Setsi sa Theknoloji sa Tokyo ba bontšitse hore likaroloana tsa koporo tsa oxide tse ho sub-nanoscale ke li-catalyst tse matla ho feta tse ho nanoscale.Li-subnanoparticles tsena li ka boela tsa susumetsa karabelo ea oxidation ea li-hydrocarbon tse nkhang hamonate ho feta li-catalysts tse sebelisoang hona joale indastering.Boithuto bona bo bula tsela ea tšebeliso e ntle le e atlehileng ea li-hydrocarbon tse nkhang hamonate, tseo e leng lisebelisoa tsa bohlokoa bakeng sa lipatlisiso le indasteri.

Khetho ea oxidation ea hydrocarbon e bohlokoa tšebetsong e mengata ea lik'hemik'hale le lits'ebetsong tsa indasteri, 'me ka hona, bo-rasaense ba ntse ba batla litsela tse sebetsang hantle tsa ho phethahatsa oxidation ena.Li-nanoparticles tsa Copper oxide (CunOx) li fumanoe li le molemo e le mohloli oa ho sebetsana le li-hydrocarbon tse nkhang hamonate, empa takatso ea metsoako e sebetsang le ho feta e ntse e tsoela pele.

Nakong e fetileng, bo-rasaense ba ile ba sebelisa li-catalyst tse thehiloeng ka tšepe tse nang le likaroloana tse boemong ba sub-nano.Boemong bona, likaroloana li lekanya ka tlase ho nanometer 'me ha li behiloe holim'a li-substrates tse loketseng, li ka fana ka libaka tse phahameng ho feta li-catalyst tsa nanoparticle ho khothalletsa reactivity.

Mokhoa ona, sehlopha sa bo-rasaense ba kenyeletsang Prof. Kimihisa Yamamoto le Dr. Makoto Tanabe ho tsoa Tokyo Institute of Technology (Tokyo Tech) ba ile ba batlisisa karabelo ea lik'hemik'hale e entsoeng ke CunOx subnanoparticles (SNPs) ho lekola ts'ebetso ea bona ho oxidation ea li-hydrocarbon tse nkhang hamonate.Li-CunOx SNP tsa boholo bo khethehileng tse tharo (tse nang le 12, 28, le liathomo tsa koporo tse 60) li ile tsa hlahisoa ka har'a mekhoa e kang ea lifate e bitsoang dendrimers.Li tšehelitsoe holim'a zirconia substrate, li ile tsa sebelisoa ho aerobic oxidation ea motsoako oa organic o nang le selikalikoe sa benzene se nkhang hamonate.

X-ray photoelectron spectroscopy (XPS) le infrared spectroscopy (IR) li ile tsa sebelisoa ho sekaseka meaho e kopaneng ea SNP, 'me liphetho li ile tsa tšehetsoa ke lipalo tsa density functionality (DFT).

Tlhahlobo ea XPS le lipalo tsa DFT li senotse ho eketseha ha ionicity ea libonto tsa koporo-oksijene (Cu-O) ha boholo ba SNP bo fokotseha.Polarization ena e ne e le kholo ho feta e bonoang ka bongata ba libonto tsa Cu-O, mme polarization e kholo e bile sesosa sa ts'ebetso e matlafalitsoeng ea li-CunOx SNPs.

Tanabe le litho tsa sehlopha ba hlokometse hore CunOx SNPs e potlakisa oxidation ea lihlopha tsa CH3 tse khomaretsoeng selikalikoe se nkhang hamonate, ka hona se lebisa ho thehoeng ha lihlahisoa.Ha CunOx SNP catalyst e sa sebelisoe, ha ho lihlahisoa tse entsoeng.Sehlahisoa se nang le li-CunOx SNPs tse nyane ka ho fetisisa, Cu12Ox, se bile le ts'ebetso e ntle ka ho fetesisa mme se ipakile se tšoarella nako e telele.

Joalo ka ha Tanabe a hlalosa, "ntlafatso ea ionicity ea li-bond tsa Cu-O ka ho fokotseha ha boholo ba li-CunOx SNPs li thusa ts'ebetso ea tsona e ntle ea matla bakeng sa li-oxidation tse nkhang hamonate tsa hydrocarbon."

Lipatlisiso tsa bona li tšehetsa khang ea hore ho na le monyetla o moholo oa ho sebelisa li-SNP tsa koporo ea oxide e le li-catalysts lits'ebetsong tsa indasteri."Ts'ebetso e matla le mochini oa li-CunOx SNPs tse laoloang ka boholo li ka ba betere ho feta tsa li-catalyst tsa tšepe tse ntle, tse sebelisoang haholo indastering hajoale," ho boletse Yamamoto, a fana ka maikutlo a seo CunOx SNPs e ka se fihlelang nakong e tlang.

Lisebelisoa tse fanoeng ke Tokyo Institute of Technology.Tlhokomeliso: Litaba li ka hlophisoa ho latela setaele le bolelele.

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