Highly selective and active CO(2) reduction electrocatalysts based on cobalt phthalocyanine/carbon nanotube hybrid structures.
Highly selective and active CO(2) reduction electrocatalysts based on cobalt phthalocyanine/carbon nanotube hybrid structures.
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DOI：
10.1038/ncomms14675
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发表时间：
2017-03-08
影响因子：
16.6
通讯作者：
Wang H
中科院分区：
文献类型：
--
作者：
Zhang X;Wu Z;Zhang X;Li L;Li Y;Xu H;Li X;Yu X;Zhang Z;Liang Y;Wang H
用可再生能源电化学还原二氧化碳是生产碳中性燃料的可持续方式。然而，开发活性、选择性和稳定的电催化剂是具有挑战性的，并且需要在一系列长度尺度上进行材料结构设计和定制。在这里，我们报告了一个钴酞菁基高性能的二氧化碳还原电催化剂材料的纳米和分子相结合的方法开发。在纳米尺度上，酞菁钴（CoPc）分子均匀地锚定在碳纳米管上，以提供显著增加的电流密度、改善的一氧化碳选择性和增强的耐久性。在分子水平上，通过将氰基引入到CoPc分子中，进一步增强了催化性能。所得到的混合催化剂在宽电位范围内表现出>95%的一氧化碳生产法拉第效率和非凡的催化活性，在近中性水溶液中，在0.52 V的过电位下，电流密度为15.0 mA cm-2，转换频率为4.1 s-1。二氧化碳的电化学还原是生产碳中性燃料的可持续方式。在这里，作者采用纳米级和分子相结合的方法来开发一种高活性和选择性的酞菁钴/碳纳米管混合电催化剂，用于将二氧化碳还原为一氧化碳。
Electrochemical reduction of carbon dioxide with renewable energy is a sustainable way of producing carbon-neutral fuels. However, developing active, selective and stable electrocatalysts is challenging and entails material structure design and tailoring across a range of length scales. Here we report a cobalt-phthalocyanine-based high-performance carbon dioxide reduction electrocatalyst material developed with a combined nanoscale and molecular approach. On the nanoscale, cobalt phthalocyanine (CoPc) molecules are uniformly anchored on carbon nanotubes to afford substantially increased current density, improved selectivity for carbon monoxide, and enhanced durability. On the molecular level, the catalytic performance is further enhanced by introducing cyano groups to the CoPc molecule. The resulting hybrid catalyst exhibits >95% Faradaic efficiency for carbon monoxide production in a wide potential range and extraordinary catalytic activity with a current density of 15.0 mA cm−2 and a turnover frequency of 4.1 s−1 at the overpotential of 0.52 V in a near-neutral aqueous solution. Electrochemical reduction of carbon dioxide is a sustainable way of producing carbon-neutral fuels. Here, the authors take a combined nanoscale and molecular approach to develop a highly active and selective cobalt phthalocyanine/carbon nanotube hybrid electrocatalyst for carbon dioxide reduction to carbon monoxide.