Effects of Cu Precursor Types on the Catalytic Activity of Cu/ZrO2 toward Methanol Synthesis via CO2 Hydrogenation,Industrial & Engineering Chemistry Research

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Effects of Cu Precursor Types on the Catalytic Activity of Cu/ZrO2 toward Methanol Synthesis via CO2 Hydrogenation
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-10-09 , DOI: 10.1021/acs.iecr.9b03627
Shohei Tada ₁ , Kazumasa Oshima ₂ , Yoshihiro Noda ₂ , Ryuji Kikuchi ₁ , Minoru Sohmiya ₂ , Tetsuo Honma ₃ , Shigeo Satokawa ₂

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This paper presents the influence of different types of copper precursors on CO₂-to-methanol hydrogenation over copper nanoparticles on amorphous ZrO₂. Here, we chose copper nitrate hydrate, copper acetate hydrate, and a copper ammine complex as the precursor. A copper-acetate-based catalyst, which was precalcined at 350 °C, was more active and selective toward methanol than were the other catalysts. Regardless of the different copper precursors, after calcining a mixture of a copper precursor and amorphous ZrO₂ at 350 °C, surface-dispersed Cu²⁺ species ([CuO₄] square planes) were partly formed on amorphous ZrO₂. The Cu²⁺ species was reduced by H₂ to form Cu⁰ nanoparticles (<5 nm). This paper reports that using copper acetate monohydrate as a copper precursor leads to the greater number of active sites (Cu⁰—a-ZrO₂ interfacial sites) compared with the other precursors.

中文翻译：

铜前驱体类型对Cu / ZrO ₂催化CO ₂加氢合成甲醇的催化活性的影响

本文介绍了不同类型的铜前体对无定形ZrO ₂上的铜纳米颗粒上CO _2-甲醇加氢的影响。在这里，我们选择硝酸铜水合物，乙酸铜水合物和铜氨络合物作为前体。在350°C下进行预煅烧的基于乙酸铜的催化剂比其他催化剂更具活性，对甲醇的选择性更高。不管铜前驱体如何，在将铜前驱体和无定形ZrO ₂的混合物在350℃下煅烧后，在无定形ZrO ₂上部分形成了表面分散的Cu ²⁺物种（[CuO ₄ ]方平面）。H 2还原了Cu ²⁺物种₂形成Cu ⁰纳米颗粒（<5 nm）。本文报道，与其他前体相比，使用一水合乙酸铜作为铜前体会导致更多的活性位点（Cu ⁰ -a-ZrO ₂界面位）。

更新日期：2019-10-10

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