Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 52, Pages 18903-18907Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201912733
Keywords
carbon nanoplating; cobalt; interfacial engineering; nanofibrous membrane; nitrogen fixation
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Funding
- Natural Science Foundation of Shanghai [19ZR1401100]
- National Natural Science Foundation of China [51873029]
- Fundamental Research Funds for the Central Universities [2232019G-01]
- Innovation Program of Shanghai Municipal Education Commission [2017-01-07-00-03-E00024]
- Program of Shanghai Academic Research Leader [18XD1400200]
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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 TiO2 nanofibrous membrane, is developed. The TiO2 nanofibrous membrane can uniformly confine the CoS nanosheets against agglomeration, and contribute substantially to the NRR performance. The intimate coupling between CoS and TiO2 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@TiO2 electrocatalyst achieves a high ammonia yield (8.09x10(-10) mol s(-1) cm(-2)) and Faradaic efficiency (28.6 %), as well as long-term durability.
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