期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 48, 页码 24783-24792出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta08753a
关键词
-
资金
- National Natural Science Foundation of China [21776314, 21573108, 51761135104, 21872069]
- National Key R&D Program of China [2017YFA0208200, 2016YFB0700600, 2015CB659300]
- Shandong Provincial Natural Science Foundation [ZR2017MB059]
- Natural Science Foundation of Jiangsu Province [BK20180008]
- High-Level Entrepreneurial and Innovative Talents Program of Jiangsu Province
- Fundamental Research Funds for the Central Universities [18CX05016A, 020514380146]
For efficient electrocatalysis, the rational construction of unique electrochemical interfaces is very important to enhance the intrinsic activity and expose more active sites. Herein, we demonstrate an atomic-migration-driven in situ thermal sulfurization-phosphorization strategy for the preparation of triple-layer-shelled hollow nanobubbles consisting of defect-rich ultrathin MoS2/MoP outer layers and a porous N-doped carbon inner layer (MoS2/MoP/NC) for efficient hydrogen evolution reaction (HER). In this method, (NH4)(2)MoS4/NaH2PO4-blended polymer nanospheres were prepared via aqueous-phase reaction, followed by a one-step thermal annealing process. During the thermal treatment, the MoS2 outer shell and NC inner layer were first formed at 500 degrees C; then the temperature was increased to 900 degrees C and the competitive reaction between the Mo atoms of the MoS2 species formed a strong driving force to transfer P species from the interior to the surface of the porous NC layer and form an intermediate layer of MoP. This strategy realized the formation of ultrathin MoS2/MoP/NC heterointerfaces with a high surface area (954.3 m(2) g(-1)), abundant defect/edge sites, and improved electrocatalytic activity. In both acidic and alkaline solutions, the MoS2/MoP/NC hollow nanobubbles exhibited low overpotentials (151 and 208 mV) to drive a current density of 10 mA cm(-2), small Tafel slopes (58 and 62 mV dec(-1)), and excellent stability for hydrogen production, respectively. This work provides a new route for the construction of active electrochemical heterointerfaces for efficient electrocatalysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据