To open up the possibility of synthesizing useful substances from CO₂, we have developed new catalysts that hydrogenate CO₂ to methanol with high yield at 300 °C and higher. In this study, methanol synthesis via CO₂ hydrogenation at 250–350 °C and 10 bar was investigated using Zr-based metal oxide catalysts, MZrO_x (M = Al, Mn, Cu, Zn, Ga, and In). The different metals (M) determined the suitable reaction temperature wherein the maximum yield of methanol was obtained. CuZrO_x was a suitable catalyst for low-temperature methanol synthesis because the yield decreased with increasing reaction temperature from 250 °C to 350 °C. In contrast, ZnZrO_x, GaZrO_x, and InZrO_x were suitable for methanol synthesis at 300 °C and higher. In particular, ZnZrO_x afforded the highest yield of methanol (60 mL_STP h⁻¹ g⁻¹ at 300 °C) among the prepared MZrO_x catalysts.

中文翻译：

---

反应温度对MZrOx（M = Al，Mn，Cu，Zn，Ga和In）上CO2-甲醇加氢的影响

为了开辟从CO ₂合成有用物质的可能性，我们开发了新的催化剂，该催化剂在300°C和更高的温度下可以高产率将CO ₂加氢成甲醇。在这项研究中，使用Zr基金属氧化物催化剂M ZrO _x（M = Al，Mn，Cu，Zn，Ga和In）研究了在250-350°C和10 bar下通过CO ₂氢化合成甲醇的方法。不同的金属（M）确定了合适的反应温度，其中获得了最大的甲醇产率。CuZrO _X甲醇是低温甲醇合成的合适催化剂，因为随着反应温度从250°C增加到350°C，收率降低。相反，ZnZrO _x，GaZrO _x和InZrO _x适合在300°C及更高温度下进行甲醇合成。特别地，在制备的M ZrO _x催化剂中，ZnZrO _x提供最高的甲醇产率（300°C时60 mL _STP h ^-1 g ^-1）。