Aerosol synthesis of molybdenum diselenide-reduced graphene oxide composite with empty nanovoids and enhanced hydrogen evolution reaction performances

被引：40

作者：

Park, Seung-Keun ^{[1
]}

Park, Gi Dae ^{[2
]}

Ko, Dongjin ^{[1
]}

Kang, Yun Chan ^{[2
]}

Piao, Yuanzhe ^{[1
,3
]}

机构：

[1] Seoul Natl Univ, Grad Sch Convergence Sci & Technol, Program Nano Sci & Technol, 145 Gwanggyo Ro, Suwon 443270, Gyeonggi Do, South Korea

[2] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

[3] Adv Inst Convergence Technol, 145 Gwanggyo Ro, Suwon 443270, Gyeonggi Do, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2017年 / 315卷

基金：

新加坡国家研究基金会;

关键词：

Molybdenum diselenide; Porous structure; Reduced graphene oxide; Hydrogen evolution reaction; Spray drying; LITHIUM STORAGE PROPERTIES; MOS2; NANOSHEETS; EFFICIENT ELECTROCATALYSTS; HYBRID NANOSTRUCTURES; ULTRATHIN NANOSHEETS; CATALYTIC-ACTIVITY; BINDER-FREE; NANOPARTICLES; MOSE2/GRAPHENE; POWDERS;

D O I：

10.1016/j.cej.2017.01.032

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

MoSe2-reduced graphene oxide (rGO) composite powders with unique structures containing empty nanovoids and excellent hydrogen evolution reaction (HER) performances were prepared using a pilot scale spray-drying process. One-step post-treatment of the spray-dried powders produced the macroporous MoSe2-rGO composite with empty nanovoids through an intermediate MoO3-Se-GO composite. Ultrafine MoSe2 nanocrystals, which consisted of a few layers and were several" nanometers in size, were uniformly dispersed on the surfaces of the MoSe2-rGO composite powders with the optimal rGO contents. The MoSe2-rGO-M composite (20 wt% rGO) had the optimized porous structure with a uniform distribution of MoSe2 nanocrystals and enough the rGO content for a fast electron transport, and thus exhibited the highest HER activity. The MoSe2-rGO-M composite powders exhibited a current density of 10 mA cm(-2) at a small overpotential of 0.21 V, which was lower than that of bare MoSe2 (10 mA cm (-2) at 0.31 V). The Tafel slopes for bare MoSe2 and MoSe2-rGO-M composite powders were 120 and 57 mV dec(-1), respectively. The synergistic effects of rGO sheets and MoSe2 nanocrystals and the unique porous structure resulted in outstanding HER performance with a small Tafel slope and overpotential. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：355 / 363

页数：9

共 65 条

[1] Supramolecular Polymerization Promoted In Situ Fabrication of Nitrogen-Doped Porous Graphene Sheets as Anode Materials for Li-Ion Batteries [J].