2D Porous Carbons prepared from Layered Organic-Inorganic Hybrids and their Use as Oxygen-Reduction Electrocatalysts
2D Porous Carbons prepared from Layered Organic-Inorganic Hybrids and their Use as Oxygen-Reduction Electrocatalysts
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DOI：
10.1002/adma.201700707
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发表时间：
2017-07-26
影响因子：
29.4
通讯作者：
Thomas, Arne
中科院分区：
文献类型：
--
作者：
Li, Shuang;Cheng, Chong;Thomas, Arne
二维多孔碳纳米材料在不同学科特别是电化学催化领域引起了极大的关注。这种2D材料的显著优点是几乎所有的表面都暴露在电解质中，并且可以参与电化学反应。在这里，提出了一种通用的活性盐模板策略，以有效地合成二维多孔碳纳米片从层状有机-无机杂化物。所得的杂原子掺杂的碳纳米片（NFe/CN）表现出优异的性能的氧还原反应和锌空气电池电极。在一系列NFe/CN催化剂中，最佳催化剂的活性在起始电位（Pt/C为0.930 V，Pt/C为0.915 V）、半波电位（Pt/C为0.859 V，Pt/C为0.816 V）、长期稳定性和甲醇耐受性方面超过了传统碳载Pt催化剂。此外，当用作锌-空气电池的阴极催化剂时，本文所述的NFe/CN催化剂的性能优于商用Pt/C催化剂。
2D porous carbon nanomaterials have attracted tremendous attention in different disciplines especially for electrochemical catalysis. The significant advantage of such 2D materials is that nearly all their surfaces are exposed to the electrolyte and can take part in the electrochemical reaction. Here, a versatile active-salt-templating strategy to efficiently synthesize 2D porous carbon nanosheets from layered organic-inorganic hybrids is presented. The resulting heteroatom-doped carbon nanosheets (NFe/CNs) exhibit exceptional performance for the oxygen-reduction reaction and in Zn-air battery electrodes. The activity of the best catalyst within a series of NFe/CNs exceeds the performance of conventional carbon-supported Pt catalysts in terms of onset potential (0.930 vs 0.915 V of Pt/C), half-wave potential (0.859 vs 0.816 V of Pt/C), long-time stability, and methanol tolerance. Also, when applied as a cathode catalyst in a zinc-air battery the NFe/CNs presented here outperform commercial Pt/C catalysts.