Shenzhen Engineering Lab for Supercapacitor Materials, Shenzhen Key Laboratory for Advanced Materials, and Department of Material Science and Engineering, Shenzhen Graduate School , Harbin Institute of Technology , University Town, Shenzhen 518055 , China.
ACS Appl Mater Interfaces. 2018 Sep 5;10(35):29866-29875. doi: 10.1021/acsami.8b06101. Epub 2018 Aug 23.
Diamond/graphite hybrid nanosheets (DGNSs) have been epitaxially grown on boron-doped diamond (BDD) films from CH/H mixture gas by microwave plasma chemical vapor deposition. The DGNSs are vertically aligned on the crystal facets of the BDD films uniformly, densely, and orderly. The DGNSs are composed of the core diamond sheets and the surface graphitic overlayers, which possess an open edge structure. By posttreatment in NH atmosphere in a microwave plasma or a tube furnace, the N-doped DGNSs (NDGNSs) were obtained. The electrocatalytic performance toward oxygen reduction reaction (ORR) for the DGNSs was greatly enhanced after doping with N, and the doped pyridinic N contributes more to the ORR. The electrocatalytic activity for ORR of the NDGNSs doped at 650 °C in NH in a tube furnace is the highest in all of the samples, which is comparable to the commercial Pt/C. The present work provides a novel electrocatalyst for the ORR with high performance.
金刚石/石墨混合纳米片（DGNSs）通过微波等离子体化学气相沉积，从 CH/H 混合气体在掺硼金刚石（BDD）薄膜上外延生长。DGNSs 均匀、密集且有序地垂直排列在 BDD 薄膜的晶面上。DGNSs 由核心金刚石片和表面石墨覆盖层组成，具有开放边缘结构。通过在微波等离子体或管式炉中 NH 气氛下进行后处理，得到 N 掺杂的 DGNSs（NDGNSs）。掺杂 N 后，DGNSs 对氧还原反应（ORR）的电催化性能大大提高，掺杂的吡啶 N 对 ORR 的贡献更大。在管式炉中于 650°C 在 NH 中掺杂的 NDGNSs 的 ORR 电催化活性在所有样品中最高，可与商业 Pt/C 相媲美。本工作为高性能 ORR 提供了一种新型电催化剂。
