Geng Jing, Zhang Hui-Juan, Yao Sunwu, Cai Chunlei, Ma Zi-Feng, Wang Jiancheng, Wei Haibing, Yang Junhe
School of Materials Science and Engineering, The University of Shanghai for Science and Technology Shanghai China
Department of Chemical Engineering, Shanghai Jiaotong University Shanghai China.
RSC Adv. 2019 Aug 9;9(43):24770-24776. doi: 10.1039/c9ra03720a. eCollection 2019 Aug 8.
The search for an economical electrocatalyst for oxygen reduction reaction (ORR) is a worldwide issue for fuel cells and metal-air batteries. Herein, we used cheap and available high-sulfur inferior coal as the single precursor to synthesize an N, S dual-doped carbon (NSC) metal-free electrocatalyst for the ORR. The N, S dual-doped carbon (NSC), prepared at 800 °C (NSC800), possessed a large specific surface area of 942 m g, with an amorphous carbon structure and more defects than the others. Furthermore, it contains 1.06 at% N and 2.24 at% S, where N is resolved into pyridinic-N, pyrrolic-N, and graphitic-N. For the electrochemical behavior, NSC800 displayed a good ORR electrocatalytic activity, with the ORR peak potential at -0.245 V ( SCE) and half-wave potential ( ) at -0.28 V ( SCE) in an alkaline solution. This study not only gives an original and facile method to prepare an economical ORR electrocatalyst but also provides a novel clean-use of high-sulfur inferior coal.
寻找一种用于氧还原反应（ORR）的经济高效的电催化剂是燃料电池和金属空气电池领域的一个全球性问题。在此，我们使用廉价易得的高硫劣质煤作为单一前驱体，合成了一种用于ORR的N、S双掺杂无金属碳（NSC）电催化剂。在800℃制备的N、S双掺杂碳（NSC800）具有942 m²/g的大比表面积，具有无定形碳结构且比其他样品有更多缺陷。此外，它含有1.06 at%的N和2.24 at%的S，其中N以吡啶型N、吡咯型N和石墨型N的形式存在。对于电化学行为，NSC800在碱性溶液中显示出良好的ORR电催化活性，ORR峰电位为-0.245 V（SCE），半波电位为-0.28 V（SCE）。本研究不仅提供了一种制备经济高效ORR电催化剂的新颖简便方法，还为高硫劣质煤的新型清洁利用提供了途径。
