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CO2 to Formic Acid Using Cu-Sn on Laser-Induced Graphene.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-08-24 , DOI: 10.1021/acsami.0c08964 Muqing Ren 1 , Hongzhi Zheng 2 , Jincheng Lei , Jibo Zhang 2 , Xiaojun Wang 2 , Boris I Yakobson 1 , Yan Yao 2 , James M Tour 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-08-24 , DOI: 10.1021/acsami.0c08964 Muqing Ren 1 , Hongzhi Zheng 2 , Jincheng Lei , Jibo Zhang 2 , Xiaojun Wang 2 , Boris I Yakobson 1 , Yan Yao 2 , James M Tour 1
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Converting CO2 into fuels and other value-added chemicals via an electrochemical reduction method has recently attracted great interest. However, there are still challenges to find suitable catalysts with high selectivity toward the formic acid formation. Here, we report the bimetallic CuSn-based catalyst to reduce CO2 to formic acid by optimizing the ratio of Cu to Sn to achieve the optimal selectivity. The catalyst is generated on laser-induced graphene. Among the catalysts, CuSn-4 with Cu/Sn atomic ratio close to 1:2 shows a faradaic efficiency of 99% toward formic acid with a high partial current density of 26 mA/cm2. Density functional theory calculations demonstrate that OCHO* intermediate formation is more favorable than that of COOH* on Sn sites, while OCHO* intermediate formation is moderate on Cu sites. The synergetic catalytic effect between Cu and Sn would further favor HCOOH formation. This study provides significant insight into the mechanism of formic acid formation.
中文翻译：
在激光诱导的石墨烯上使用Cu-Sn将CO2转化为甲酸。
通过电化学还原法将CO 2转化为燃料和其他增值化学品最近引起了极大的兴趣。然而，寻找对甲酸形成具有高选择性的合适催化剂仍然存在挑战。在这里，我们报告了双金属CuSn基催化剂，通过优化Cu与Sn的比例来实现最佳选择性，从而将CO 2还原为甲酸。催化剂在激光诱导的石墨烯上生成。在催化剂中，Cu / Sn原子比接近1：2的CuSn-4对甲酸的法拉第效率为99％，分流密度为26 mA / cm 2。。密度泛函理论计算表明，Sn位上的OCHO *中间形成比COOH *更好，而Cu位上的OCHO *中间形成则中等。Cu和Sn之间的协同催化作用将进一步促进HCOOH的形成。这项研究提供了对甲酸形成机理的重要见解。
更新日期：2020-09-16
中文翻译：
在激光诱导的石墨烯上使用Cu-Sn将CO2转化为甲酸。
通过电化学还原法将CO 2转化为燃料和其他增值化学品最近引起了极大的兴趣。然而，寻找对甲酸形成具有高选择性的合适催化剂仍然存在挑战。在这里，我们报告了双金属CuSn基催化剂，通过优化Cu与Sn的比例来实现最佳选择性，从而将CO 2还原为甲酸。催化剂在激光诱导的石墨烯上生成。在催化剂中，Cu / Sn原子比接近1：2的CuSn-4对甲酸的法拉第效率为99％，分流密度为26 mA / cm 2。。密度泛函理论计算表明，Sn位上的OCHO *中间形成比COOH *更好，而Cu位上的OCHO *中间形成则中等。Cu和Sn之间的协同催化作用将进一步促进HCOOH的形成。这项研究提供了对甲酸形成机理的重要见解。
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