Formation of Mo-Polydopamine Hollow Spheres and Their Conversions to MoO2/C and Mo2C/C for Efficient Electrochemical Energy Storage and Catalyst

被引：151

作者：

Wang, Chunli ^{[1
,2
]}

Sun, Lianshan ^{[1
]}

Zhang, Feifei ^{[1
]}

Wang, Xuxu ^{[1
,2
]}

Sun, Qujiang ^{[1
]}

Cheng, Yong ^{[1
]}

Wang, Limin ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Peoples R China

[2] Univ Sci & Technol China, Hefei 230026, Peoples R China

来源：

SMALL | 2017年 / 13卷 / 32期

基金：

中国国家自然科学基金;

关键词：

MOLYBDENUM CARBIDE NANOPARTICLES; HYDROGEN-EVOLUTION; PARTICLE-SIZE; CARBON; ELECTROCATALYST; PERFORMANCE; ELECTRODE; HYBRID; MICROSPHERES; CHALLENGES;

D O I：

10.1002/smll.201701246

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly uniform hierarchical Mo-polydopamine hollow spheres are synthesized for the first time through a liquid-phase reaction under ambient temperature. A selfassembly mechanism of the hollow structure of Mo-polydopamine precursor is discussed in detail, and a determined theory is proposed in a water-in-oil system. Via different annealing process, these precursors can be converted into hierarchical hollow MoO2/C and Mo2C/C composites without any distortion in shape. Owing to the wellorganized structure and nanosize particle embedding, the as-prepared hollow spheres exhibit appealing performance both as the anode material for lithium-ion batteries and as the catalyst for hydrogen evolution reaction (HER). Accordingly, MoO2/C delivers a high reversible capacity of 940 mAh g(-1) at 0.1 A g(-1) and 775 mAh g(-1) at 1 A g(-1) with good rate capability and long cycle performance. Moreover, Mo2C/C also exhibits an enhanced electrocatalytic performance with a low overpotential for HER in both acidic and alkaline conditions, as well as remarkable stability.

引用

页数：11

共 63 条

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