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Metallic Porous Iron Nitride and Tantalum Nitride Single Crystals with Enhanced Electrocatalysis Performance
Advanced Materials ( IF 27.4 ) Pub Date : 2018-12-21 , DOI: 10.1002/adma.201806552 Feiyan Zhang 1 , Shaobo Xi 1 , Guoming Lin 1 , Xiuli Hu 1 , Xiong Wen David Lou 2 , Kui Xie 1
Advanced Materials ( IF 27.4 ) Pub Date : 2018-12-21 , DOI: 10.1002/adma.201806552 Feiyan Zhang 1 , Shaobo Xi 1 , Guoming Lin 1 , Xiuli Hu 1 , Xiong Wen David Lou 2 , Kui Xie 1
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Altering a material's catalytic properties would require identifying structural features that deliver electrochemically active surfaces. Single‐crystalline porous materials, combining the advantages of long‐range ordering of bulk crystals and large surface areas of porous materials, would create sufficient active surfaces by stabilizing 2D active moieties confined in lattice and may provide an alternative way to create high‐energy surfaces for electrocatalysis that are kinetically trapped. Here, a radical concept of building active metal–nitrogen moieties with unsaturated nitrogen coordination on a porous surface by directly growing metallic porous metal nitride (Fe3N and Ta5N6) single crystals at unprecedented 2 cm scale is reported. These porous single crystals demonstrate exceptionally high conductivity of 0.1–1.0 × 105 S cm−1, while the atomic surface layers of the porous crystals are confirmed to be an Fe termination layer for Fe3N and a Ta termination layer for Ta5N6. The unsaturated metal–nitrogen moieties (Fe6–N and Ta5–N3) with unique electronic structures demonstrate enhanced electrocatalysis performance and durability.
中文翻译：
具有增强的电催化性能的金属多孔氮化铁和氮化钽单晶
改变材料的催化性能将需要确定提供电化学活性表面的结构特征。单晶多孔材料结合了块状晶体的长程排序和多孔材料大表面积的优点，可以通过稳定二维晶格内的活性部分来产生足够的活性表面，并可能提供一种替代的方式来创建高能表面用于动力学捕获的电催化。在这里，一个基本概念是通过直接生长金属多孔金属氮化物（Fe 3 N和Ta 5 N 6）据报道单晶的规模达到了前所未有的2厘米。这些多孔单晶显示出0.1–1.0×10 5 S cm -1的极高电导率，而多孔晶体的原子表面层被证实是Fe 3 N的Fe终止层和Ta 5 N的Ta终止层。6。具有独特电子结构的不饱和金属-氮部分（Fe 6 -N和Ta 5 -N 3）显示出增强的电催化性能和耐用性。
更新日期：2018-12-21
中文翻译：
具有增强的电催化性能的金属多孔氮化铁和氮化钽单晶
改变材料的催化性能将需要确定提供电化学活性表面的结构特征。单晶多孔材料结合了块状晶体的长程排序和多孔材料大表面积的优点，可以通过稳定二维晶格内的活性部分来产生足够的活性表面，并可能提供一种替代的方式来创建高能表面用于动力学捕获的电催化。在这里，一个基本概念是通过直接生长金属多孔金属氮化物（Fe 3 N和Ta 5 N 6）据报道单晶的规模达到了前所未有的2厘米。这些多孔单晶显示出0.1–1.0×10 5 S cm -1的极高电导率，而多孔晶体的原子表面层被证实是Fe 3 N的Fe终止层和Ta 5 N的Ta终止层。6。具有独特电子结构的不饱和金属-氮部分（Fe 6 -N和Ta 5 -N 3）显示出增强的电催化性能和耐用性。
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