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Carbon‐Nanoplated CoS@TiO 2 Nanofibrous Membrane: An Interface‐Engineered Heterojunction for High‐Efficiency Electrocatalytic Nitrogen Reduction
Author(s) -
Liu YiTao,
Chen Xingxing,
Yu Jianyong,
Ding Bin
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201912733
Subject(s) - faraday efficiency , electrocatalyst , materials science , heterojunction , chemical engineering , electrochemistry , ammonia production , membrane , carbon fibers , ammonia , inorganic chemistry , nanotechnology , electrode , chemistry , composite material , organic chemistry , optoelectronics , biochemistry , engineering , composite number
Developing noble‐metal‐free electrocatalysts is important to industrially viable ammonia synthesis through the nitrogen reduction reaction (NRR). However, the present transition‐metal electrocatalysts still suffer from low activity and Faradaic efficiency due to poor interfacial reaction kinetics. Herein, an interface‐engineered heterojunction, composed of CoS nanosheets anchored on a TiO 2 nanofibrous membrane, is developed. The TiO 2 nanofibrous membrane can uniformly confine the CoS nanosheets against agglomeration, and contribute substantially to the NRR performance. The intimate coupling between CoS and TiO 2 enables easy charge transfer, resulting in fast reaction kinetics at the heterointerface. The conductivity and structural integrity of the heterojunction are further enhanced by carbon nanoplating. The resulting C@CoS@TiO 2 electrocatalyst achieves a high ammonia yield (8.09×10 −10 mol s −1 cm −2 ) and Faradaic efficiency (28.6 %), as well as long‐term durability.