Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 21, Pages 6325-6329Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201501419
Keywords
electrocatalysis; hydrogen evolution reaction; phosphorus; reduced graphene oxide; tungsten nitrides
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Funding
- NSFC of China [21031001, 91122018, 21371053, 21101061]
- Program for Innovative Research Team in University [IRT-1237]
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Phosphorus-modified tungsten nitride/reduced graphene oxide (P-WN/rGO) is designed as a high-efficient, low-cost electrocatalyst for the hydrogen evolution reaction (HER). WN (ca. 3nm in size) on rGO is first synthesized by using the H-3[PO4(W3O9)(4)] cluster as a W source. Followed by phosphorization, the particle size increase slightly to about 4nm with a P content of 2.52at%. The interaction of P with rGO and WN results in an obvious increase of work function, being close to Pt metal. The P-WN/rGO exhibits low onset overpotential of 46mV, Tafel slope of 54mVdec(-1), and a large exchange current density of 0.35mAcm(-2) in acid media. It requires overpotential of only 85mV at current density of 10mAcm(-2), while remaining good stability in accelerated durability testing. This work shows that the modification with a second anion is powerful way to design new catalysts for HER.
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