期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 27, 期 6, 页码 2155-2164出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202004371
关键词
electrocatalysis; hypercrosslinked framework; micelle; molybdenum disulfide; porous carbon
资金
- Science and Technology Commission of Shanghai Municipality [17ZR1441700]
- National Key Research and Development Program of China [2017YFE9134000]
- Natural Science Foundation of China for Excellent Young Scholars [51722304]
- Natural Science Foundation of China [21406220, 21720102002, 5171101862]
- Shanghai Pujiang Talent Program [18PJ1406100]
This study utilizes pyridinium-containing ionic hypercrosslinked micellar frameworks as templates for confined growth of molybdenum disulfide through electrostatic interaction. The resulting MoS2-anchored nitrogen-doped porous carbons exhibit excellent electrocatalytic activity for hydrogen evolution reaction.
Transition metal-based nanoparticle-embedded carbon materials have received increasing attention for constructing next-generation electrochemical catalysts for energy storage and conversion. However, designing hybrid carbon materials with controllable hierarchical micro/mesoporous structures, excellent dispersion of metal nanoparticles, and multiple heteroatom-doping remains challenging. Here, a novel pyridinium-containing ionic hypercrosslinked micellar frameworks (IHMFs) prepared from the core-shell unimicelle of s-poly(tert-butyl acrylate)-b-poly(4-bromomethyl) styrene (s-PtBA-b-PBMS) and linear poly(4-vinylpyridine) were used as self-sacrificial templates for confined growth of molybdenum disulfide (MoS2) inside cationic IHMFs through electrostatic interaction. After pyrolysis, MoS2-anchored nitrogen-doped porous carbons possessing tunable hierarchical micro/mesoporous structures and favorable distributions of MoS2 nanoparticles exhibited excellent electrocatalytic activity for hydrogen evolution reaction as well as small Tafel slope of 66.7 mV dec(-1), low onset potential, and excellent cycling stability under acidic condition. Crucially, hierarchical micro/mesoporous structure and high surface area could boost their catalytic hydrogen evolution performance. This approach provides a novel route for preparation of micro/mesoporous hybrid carbon materials with confined transition metal nanoparticles for electrochemical energy conversion.
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