The Cu-based perovskite shows good methanol selectivity but low CO2 conversion in CO2 hydrogenation to methanol. After treated by NaBH4 liquid reduction, perovskite LaCuZn sample (l-LCZ) is reduced partially, particle size becomes smaller and BET surface area increases. This sample (l-LCZ) was tested for CO2 hydrogenation to methanol direct without H2 reduction, and the catalytic activity of it is higher obviously than that over the catalyst LaCuZn which is reduced by H2 at 623 K for 6 h. NaBH4 liquid reduction has good influence on the perovskite properties.

中文翻译：

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NaBH4液体还原对LaCuZn钙钛矿CO2加氢制甲醇的影响

铜基钙钛矿显示出良好的甲醇选择性，但在 CO2 加氢制甲醇中的 CO2 转化率较低。NaBH4液体还原处理后，钙钛矿LaCuZn样品（l-LCZ）部分还原，粒径变小，BET表面积增加。该样品（l-LCZ）在不进行H2还原的情况下进行了CO2直接加氢制甲醇测试，其催化活性明显高于催化剂LaCuZn，后者在623 K下6小时被H2还原。NaBH4 液体还原对钙钛矿性质有很好的影响。