Canales Rafael, Gil-Calvo M, Barrio V Laura
Bilbao School of Engineering (University of the Basque Country), Bilbao, Spain.
Heliyon. 2023 Jul 23;9(8):e18456. doi: 10.1016/j.heliyon.2023.e18456. eCollection 2023 Aug.
The CO catalytic reduction activities of four different Co-modified Ni-based catalysts derived from hydrotalcite-like materials (HTCs) prepared by co-precipitation method were investigated under thermal and photocatalytic conditions. All catalysts were tested from 473 to 723 K at 10 bar (abs). The light intensity for photocatalytic reactions was 2.4 W cm. The samples were characterized to determine the effect of morphological and physicochemical properties of mono-bimetallic active phases on their methanation activity. The activity toward CO methanation followed the next order: Ni > Co-Ni > Co. For the monometallic Ni catalyst an increase of a 72% was achieved in the photo-catalytic activity under UV and vis light irradiation at temperatures lower by > 100 K than those in a conventional reaction. Co-modified Ni based hydrotalcite catalysts performed with stability and no deactivation for the 16 h studied under visible light for methanation at 523 K due to the presence of basic sites.
研究了通过共沉淀法制备的四种不同的钴改性类水滑石衍生镍基催化剂在热催化和光催化条件下的CO催化还原活性。所有催化剂在10 bar（绝对压力）下于473至723 K进行测试。光催化反应的光强度为2.4 W/cm²。对样品进行表征以确定单双金属活性相的形态和物理化学性质对其甲烷化活性的影响。CO甲烷化活性顺序如下：Ni > Co-Ni > Co。对于单金属Ni催化剂，在紫外光和可见光照射下，在比传统反应温度低>100 K的条件下，光催化活性提高了72%。由于存在碱性位点，钴改性镍基类水滑石催化剂在523 K可见光下甲烷化反应的16小时研究中表现出稳定性且无失活现象。
