Cu2O–CuO Hollow Nanospheres as a Heterogeneous Catalyst for Synergetic Oxidation of CO,The Journal of Physical Chemistry C

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Cu2O–CuO Hollow Nanospheres as a Heterogeneous Catalyst for Synergetic Oxidation of CO
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-08-16 , DOI: 10.1021/acs.jpcc.8b04690
Bo Wei ₁ , Nating Yang ₁ , Fei Pang ₁ , Jianping Ge ₁

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Copper oxides have attracted great attention in oxidation of CO due to its high activity at low temperature. In this work, uniform Cu₂O nanospheres were synthesized through a high-temperature polyol process, and they were further transformed into a series of Cu₂O–CuO nanosphere catalysts with a tunable Cu²⁺/Cu⁺ ratio by controlled calcination in air. On the basis of the study of surface composition and the corresponding catalytic activities, a synergetic catalytic mechanism was proposed where CO adsorbed on CuO is oxidized into CO₂ by lattice oxygen of CuO, and O₂ molecules adsorbed on Cu₂O split into oxygen adatoms and transfer to fill the oxygen vacancies on CuO. The synergetic mechanism explains well the high activity and good stability of the Cu₂O–CuO catalyst as well as the self-activation effect of uncalcined catalysts.

中文翻译：

Cu ₂ O–CuO空心纳米球作为CO协同氧化的非均相催化剂

氧化铜由于其在低温下的高活性而在CO的氧化中引起了极大的关注。在这项工作中，通过高温多元醇工艺合成了均匀的Cu ₂ O纳米球，并通过在空气中控制煅烧将它们进一步转化为一系列Cu ²⁺ / Cu ⁺比可调的Cu ₂ O–CuO纳米球催化剂。。在研究表面组成和相应的催化活性的基础上，提出了协同催化机理，即吸附在CuO上的CO被CuO的晶格氧氧化为CO ₂，并吸附在Cu ₂上的O ₂分子。O分裂成氧原子并转移以填充CuO上的氧空位。协同机理很好地说明了Cu ₂ O–CuO催化剂的高活性和良好的稳定性，以及未煅烧催化剂的自活化作用。

更新日期：2018-08-17

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