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A Highly Active Star Decahedron Cu Nanocatalyst for Hydrocarbon Production at Low Overpotentials
Advanced Materials ( IF 27.4 ) Pub Date : 2018-12-14 , DOI: 10.1002/adma.201805405 Chungseok Choi 1 , Tao Cheng 2 , Michelle Flores Espinosa 1 , Huilong Fei 3 , Xiangfeng Duan 3 , William A. Goddard 2 , Yu Huang 1
Advanced Materials ( IF 27.4 ) Pub Date : 2018-12-14 , DOI: 10.1002/adma.201805405 Chungseok Choi 1 , Tao Cheng 2 , Michelle Flores Espinosa 1 , Huilong Fei 3 , Xiangfeng Duan 3 , William A. Goddard 2 , Yu Huang 1
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The electrochemical carbon dioxide reduction reaction (CO2RR) presents a viable approach to recycle CO2 gas into low carbon fuels. Thus, the development of highly active catalysts at low overpotential is desired for this reaction. Herein, a high‐yield synthesis of unique star decahedron Cu nanoparticles (SD‐Cu NPs) electrocatalysts, displaying twin boundaries (TBs) and multiple stacking faults, which lead to low overpotentials for methane (CH4) and high efficiency for ethylene (C2H4) production, is reported. Particularly, SD‐Cu NPs show an onset potential for CH4 production lower by 0.149 V than commercial Cu NPs. More impressively, SD‐Cu NPs demonstrate a faradaic efficiency of 52.43% ± 2.72% for C2H4 production at −0.993 ± 0.0129 V. The results demonstrate that the surface stacking faults and twin defects increase CO binding energy, leading to the enhanced CO2RR performance on SD‐Cu NPs.
中文翻译：
高活性星形十面体铜纳米催化剂，用于在低超电势下生产烃
电化学二氧化碳还原反应（CO 2 RR）提出了一种将CO 2气体再循环为低碳燃料的可行方法。因此，该反应需要开发低过电势的高活性催化剂。此处，独特的星形十面体铜纳米颗粒（SD-Cu NPs）电催化剂的高产率合成，表现出双边界（TBs）和多个堆积缺陷，从而导致甲烷（CH 4）的低过电势和乙烯（C的）高效率报道了2 H 4）的生产。特别是SD-Cu NPs表现出CH 4的发作潜能与商用铜纳米管相比，该产品的产量降低了0.149V。更为令人印象深刻的是，SD-Cu NP在−0.993±0.0129 V时产生C 2 H 4的法拉第效率为52.43％±2.72％。结果表明，表面堆垛层错和孪晶缺陷增加了CO结合能，从而提高了CO结合能。SD-Cu NP的CO 2 RR性能。
更新日期：2018-12-14
中文翻译：
高活性星形十面体铜纳米催化剂，用于在低超电势下生产烃
电化学二氧化碳还原反应（CO 2 RR）提出了一种将CO 2气体再循环为低碳燃料的可行方法。因此，该反应需要开发低过电势的高活性催化剂。此处，独特的星形十面体铜纳米颗粒（SD-Cu NPs）电催化剂的高产率合成，表现出双边界（TBs）和多个堆积缺陷，从而导致甲烷（CH 4）的低过电势和乙烯（C的）高效率报道了2 H 4）的生产。特别是SD-Cu NPs表现出CH 4的发作潜能与商用铜纳米管相比，该产品的产量降低了0.149V。更为令人印象深刻的是，SD-Cu NP在−0.993±0.0129 V时产生C 2 H 4的法拉第效率为52.43％±2.72％。结果表明，表面堆垛层错和孪晶缺陷增加了CO结合能，从而提高了CO结合能。SD-Cu NP的CO 2 RR性能。
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