期刊
ADVANCED FUNCTIONAL MATERIALS
卷 25, 期 25, 页码 3899-3906出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201501390
关键词
catalysts; ionic polymers; polymer frameworks; metal phosphides; porous carbon; hydrogen evolution
类别
资金
- National Basic Research Program of China (973 Program) [2013CBA01602, 2012CB933404]
- Natural Science Foundation of China [51403126, 21174083]
- Shanghai Jiao Tong University (211 Project)
- Shanghai Jiao Tong University (985 Project)
A novel phosphorus-containing porous polymer is efficiently prepared from tris(4-vinylphenyl)phosphane by radical polymerization, and it can be easily ionized to form an ionic porous polymer after treatment with hydrogen iodide. Upon ionic exchange, transition-metal-containing anions, such as tetrathiomolybdate (MoS4 (2-)) and hexacyanoferrate (Fe(CN)(6) (3-)), are successfully loaded into the framework of the porous polymer to replace the original iodide anions, resulting in a polymer framework containing complex anions (termed HT-Met, where Met = Mo or Fe). After pyrolysis under a hydrogen atmosphere, the HT-Met materials are efficiently converted at a large scale to metal-phosphide-containing porous carbons (denoted as MetP@PC, where again Met = Mo or Fe). This approach provides a convenient pathway to the controlled preparation of metal-phosphide-loaded porous carbon composites. The MetP@PC composites exhibit superior electrocatalytic activity for the hydrogen evolution reaction (HER) under acidic conditions. In particular, MoP@PC with a low loading of 0.24 mg cm(-2) (on a glass carbon electrode) affords an iR-corrected (where i is current and R is resistance) current density of up to 10 mA cm(-2) at 51 mV versus the reversible hydrogen electrode and a very low Tafel slope of 45 mV dec(-1), in rotating disk measurements under saturated N-2 conditions.
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