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Vertical Cu Nanoneedle Arrays Enhance the Local Electric Field Promoting C2 Hydrocarbons in the CO2 Electroreduction
Nano Letters ( IF 9.6 ) Pub Date : 2022-02-15 , DOI: 10.1021/acs.nanolett.1c04653 Yajiao Zhou 1 , Yanqing Liang 1, 2 , Junwei Fu 1 , Kang Liu 1 , Qin Chen 1 , Xiqing Wang 1 , Hongmei Li 1 , Li Zhu 3 , Junhua Hu 4 , Hao Pan 5 , Masahiro Miyauchi 6 , Liangxing Jiang 2 , Emiliano Cortés 3 , Min Liu 1
Nano Letters ( IF 9.6 ) Pub Date : 2022-02-15 , DOI: 10.1021/acs.nanolett.1c04653 Yajiao Zhou 1 , Yanqing Liang 1, 2 , Junwei Fu 1 , Kang Liu 1 , Qin Chen 1 , Xiqing Wang 1 , Hongmei Li 1 , Li Zhu 3 , Junhua Hu 4 , Hao Pan 5 , Masahiro Miyauchi 6 , Liangxing Jiang 2 , Emiliano Cortés 3 , Min Liu 1
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Electrocatalytic reduction of CO2 to multicarbon products is a potential strategy to solve the energy crisis while achieving carbon neutrality. To improve the efficiency of multicarbon products in Cu-based catalysts, optimizing the *CO adsorption and reducing the energy barrier for carbon–carbon (C–C) coupling are essential features. In this work, a strong local electric field is obtained by regulating the arrangement of Cu nanoneedle arrays (CuNNAs). CO2 reduction performance tests indicate that an ordered nanoneedle array reaches a 59% Faraday efficiency for multicarbon products (FEC2) at −1.2 V (vs RHE), compared to a FEC2 of 20% for a disordered nanoneedle array (CuNNs). As such, the very high and local electric fields achieved by an ordered Cu nanoneedle array leads to the accumulation of K+ ions, which benefit both *CO adsorption and C–C coupling. Our results contribute to the design of highly efficient catalysts for multicarbon products.
中文翻译：
垂直铜纳米针阵列增强局部电场促进 CO2 电还原中的 C2 烃
将CO 2电催化还原为多碳产物是解决能源危机同时实现碳中和的潜在策略。为了提高铜基催化剂中多碳产物的效率，优化*CO吸附和降低碳-碳（C-C）耦合的能垒是必不可少的特征。在这项工作中，通过调节 Cu 纳米针阵列 (CuNNAs) 的排列来获得强大的局部电场。CO 2还原性能测试表明，与 FE C2相比，有序纳米针阵列在 -1.2 V (vs RHE) 下对多碳产品 (FE C2 ) 的法拉第效率达到 59%无序纳米针阵列 (CuNNs) 为 20%。因此，由有序的铜纳米针阵列实现的非常高的局部电场导致 K +离子的积累，这有利于*CO 吸附和 C-C 耦合。我们的结果有助于设计用于多碳产品的高效催化剂。
更新日期：2022-02-15
中文翻译：
垂直铜纳米针阵列增强局部电场促进 CO2 电还原中的 C2 烃
将CO 2电催化还原为多碳产物是解决能源危机同时实现碳中和的潜在策略。为了提高铜基催化剂中多碳产物的效率，优化*CO吸附和降低碳-碳（C-C）耦合的能垒是必不可少的特征。在这项工作中，通过调节 Cu 纳米针阵列 (CuNNAs) 的排列来获得强大的局部电场。CO 2还原性能测试表明，与 FE C2相比，有序纳米针阵列在 -1.2 V (vs RHE) 下对多碳产品 (FE C2 ) 的法拉第效率达到 59%无序纳米针阵列 (CuNNs) 为 20%。因此，由有序的铜纳米针阵列实现的非常高的局部电场导致 K +离子的积累，这有利于*CO 吸附和 C-C 耦合。我们的结果有助于设计用于多碳产品的高效催化剂。
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