高效合成CO 2和H 2 O的光热催化转化Cu 0 / Cu 2 O的控制合成,ACS Sustainable Chemistry & Engineering

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高效合成CO ₂和H ₂ O的光热催化转化Cu ⁰ / Cu ₂ O的控制合成
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-01-18 , DOI: 10.1021/acssuschemeng.0c07702
Yuke Zheng ₁ , Li Zhang ₁ , Jian Guan ₁ , Shuya Qian ₁ , Zhaoxia Zhang _{1,

2} , Chee Keong Ngaw ₃ , Shaolong Wan _{1,

2} , Shuai Wang _{1,

2,

4} , Jingdong Lin _{1,

2} , Yong Wang ₅

Affiliation

使用太阳能可持续地将CO ₂和H ₂ O转化为燃料对于清洁燃料生产非常有吸引力。此工作的重点是一锅合成的双功能的Cu ⁰ /铜_2种O催化剂对CO的光热转换₂和H ₂ O的实验结果表明，在Cu ⁰ / Cu的_2种O催化剂具有Cu ⁰ /铜₂通过调整Cu前驱体与还原剂（N ₂ H ₄的比例）可以轻松合成O界面和可控的Cu ⁰与Cu ₂ O比）。所制备的铜的活性⁰ /铜₂中的CO的光热催化转化O催化剂₂和H ₂ O的大大由Cu的比的影响⁰与Cu ₂ O和反应温度。Cu ⁰ / Cu ₂ O-R2是一种以Cu前驱体与N ₂ H ₄比为1：2制备的催化剂，具有最高的活性，即13.2μmolg ^–1 h ^–1的CO和2.6μmolg ^–1 CH ₃ OH在383 K下的h ^–1，远高于Cu ₂O或Cu。这种增强的性能归因于Cu ⁰和Cu ₂ O之间的界面的形成，这不仅有益于光催化，而且有益于热催化CO ₂氢化。这项工作表明，具有混合金属氧化态的双功能催化剂可以通过一锅法制备，并且对于提高CO ₂和H ₂ O的直接耦合光热催化转化的性能非常有效。

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Controlled Synthesis of Cu0/Cu2O for Efficient Photothermal Catalytic Conversion of CO2 and H2O

Sustainable conversion of CO₂ and H₂O to fuels using solar energy is highly attractive for clean fuel production. This work focuses on the one-pot synthesis of bifunctional Cu⁰/Cu₂O catalysts for the photothermal conversion of CO₂ and H₂O. The experimental results show that the Cu⁰/Cu₂O catalysts with a Cu⁰/Cu₂O interface and a controllable ratio of Cu⁰ to Cu₂O can be readily synthesized by tuning the ratio of the Cu precursor to the reductant (N₂H₄). The activity of the prepared Cu⁰/Cu₂O catalysts in the photothermal catalytic conversion of CO₂ and H₂O is greatly influenced by the ratio of Cu⁰ to Cu₂O and the reaction temperature. Cu⁰/Cu₂O-R2, a catalyst prepared with a Cu precursor to N₂H₄ ratio of 1:2, exhibited the highest activity, i.e., 13.2 μmol g^–1 h^–1 of CO and 2.6 μmol g^–1 h^–1 of CH₃OH at 383 K, which is much higher than those of Cu₂O or Cu. Such enhanced performance is attributed to the formation of the interface between Cu⁰ and Cu₂O, which is beneficial not only to photocatalysis but also to thermocatalytic CO₂ hydrogenation. This work illustrates that a bifunctional catalyst with mixed metal oxidation states can be prepared by a one-pot method and is efficient for improving the performance of the directly coupled photothermal catalytic conversion of CO₂ and H₂O.

更新日期：2021-02-01

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