The effect of Cu on cobalt/titania nanorod (Co/TNR) catalysts for the promotion of carbon monoxide (CO) hydrogenation to hydrocarbons was investigated. Varying amounts of Cu (1.5–6.0 wt%) were loaded onto the base Co/TNR catalyst using the deposition–precipitation method. Characterization by X-ray diffraction (XRD) revealed that the Cu particles were well dispersed over the Co/TNR catalysts. Characterizations by temperature-programmed desorption of hydrogen (H2-TPD) and carbon monoxide (CO-TPD) and temperature-programmed reduction in hydrogen (H2-TPR) proved the effect of the Cu promoter in the Co/TNR catalyst by its bimetal effect with Co, where the Co/TNR catalysts containing Cu generally showed a significant improvement in comparison with the base Co/TNR catalyst not containing the Cu promoter. The CO and H2 adsorption capacities and reducibility were optimal on the catalyst containing 1.5% Cu (1.5Cu-Co/TNR). This aligns well with the catalytic activity performance of all the catalysts, where the 1.5Cu-Co/TNR catalyst exhibited the best performance, yielding 16.8% CO conversion and 57.7% C5+ hydrocarbon selectivity at 240 ℃ and 5 bar.

中文翻译：

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铜促进的钴/二氧化钛纳米棒催化剂用于 CO 加氢生成碳氢化合物

研究了 Cu 对钴/二氧化钛纳米棒 (Co/TNR) 催化剂促进一氧化碳 (CO) 加氢生成烃的影响。使用沉积-沉淀法将不同数量的 Cu（1.5-6.0 wt%）负载到基础 Co/TNR 催化剂上。X 射线衍射 (XRD) 表征表明，Cu 颗粒很好地分散在 Co/TNR 催化剂上。氢气 (H2-TPD) 和一氧化碳 (CO-TPD) 的程序升温脱附和氢气的程序升温还原 (H2-TPR) 的表征证明了 Co/TNR 催化剂中 Cu 促进剂的双金属效应与 Co，其中与不含 Cu 助催化剂的基础 Co/TNR 催化剂相比，含有 Cu 的 Co/TNR 催化剂通常表现出显着的改进。CO 和 H2 的吸附容量和还原性在含有 1.5% Cu (1.5Cu-Co/TNR) 的催化剂上是最佳的。这与所有催化剂的催化活性性能一致，其中 1.5Cu-Co/TNR 催化剂表现出最佳性能，在 240 ℃和 5 bar 条件下产生 16.8% 的 CO 转化率和 57.7% 的 C5+ 烃选择性。