An In₂O₃ supported nickel catalyst has been prepared by wet chemical reduction with sodium borohydride (NaBH₄) as a reducing agent for selective hydrogenation of carbon dioxide to methanol. Highly dispersed Ni species with intense Ni-In₂O₃ interaction and enhanced oxygen vacancies have been achieved. The highly dispersed Ni species serve as the active sites for hydrogen activation and hydrogen spillover. Abundant H adatoms are thereby generated for the oxygen vacancy creation on the In₂O₃ surface. The enhanced surface oxygen vacancies further lead to improved CO₂ conversion. As a result, an effective synergy between the active Ni sites and surface oxygen vacancies on In₂O₃ causes a superior catalytic performance for CO₂ hydrogenation with high methanol selectivity. Carbon monoxide is the only by product detected. The formation of methane can be ignored. When the reaction temperature is lower than 225 °C, the selectivity of methanol is 100%. It is higher than 64% at the temperature range between 225 °C and 275 °C. The methanol selectivity is still higher than 54% at 300 °C with a CO₂ conversion of 18.47% and a methanol yield of 0.55 g_MeOH g_cat⁻¹ h⁻¹ (at 5 MPa). The activity of Ni/In₂O₃ is higher than most of the reported In₂O₃-based catalysts.

通过用硼氢化钠（NaBH ₄）作为用于二氧化碳选择性加氢成甲醇的还原剂进行湿式化学还原，制备了由In ₂ O ₃负载的镍催化剂。已实现具有高度的Ni-In ₂ O ₃相互作用和增强的氧空位的高度分散的Ni物种。高度分散的镍物质充当氢活化和氢溢出的活性位点。由此产生大量的H原子，以在In ₂ O ₃表面上产生氧空位。表面氧空位的增加进一步导致CO _2的改善转换。结果，活性Ni位点和In ₂ O ₃上的表面氧空位之间的有效协同作用导致具有高甲醇选择性的CO ₂加氢的优异催化性能。一氧化碳是唯一检测到的副产物。甲烷的形成可以忽略。当反应温度低于225℃时，甲醇的选择性为100％。在225°C至275°C的温度范围内，它高于64％。在300°C下，甲醇的选择性仍高于54％，CO ₂转化率为18.47％，甲醇产率为0.55 g _MeOH g _cat ^-1 h ^-1（在5 MPa下）。Ni / In ₂的活性O ₃高于大多数报道的基于In ₂ O ₃的催化剂。