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Promoted Fixation of Molecular Nitrogen with Surface Oxygen Vacancies on Plasmon‐Enhanced TiO2 Photoelectrodes.
- Source :
- Angewandte Chemie International Edition; 5/4/2018, Vol. 57 Issue 19, p5278-5282, 5p
- Publication Year :
- 2018
-
Abstract
- Abstract: A hundred years on, the energy‐intensive Haber–Bosch process continues to turn the N<subscript>2</subscript> in air into fertilizer, nourishing billions of people while causing pollution and greenhouse gas emissions. The urgency of mitigating climate change motivates society to progress toward a more sustainable method for fixing N<subscript>2</subscript> that is based on clean energy. Surface oxygen vacancies (surface O<subscript>vac</subscript>) hold great potential for N<subscript>2</subscript> adsorption and activation, but introducing O<subscript>vac</subscript> on the very surface without affecting bulk properties remains a great challenge. Fine tuning of the surface O<subscript>vac</subscript> by atomic layer deposition is described, forming a thin amorphous TiO<subscript>2</subscript> layer on plasmon‐enhanced rutile TiO<subscript>2</subscript>/Au nanorods. Surface O<subscript>vac</subscript> in the outer amorphous TiO<subscript>2</subscript> thin layer promote the adsorption and activation of N<subscript>2</subscript>, which facilitates N<subscript>2</subscript> reduction to ammonia by excited electrons from ultraviolet‐light‐driven TiO<subscript>2</subscript> and visible‐light‐driven Au surface plasmons. The findings offer a new approach to N<subscript>2</subscript> photofixation under ambient conditions (that is, room temperature and atmospheric pressure). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 57
- Issue :
- 19
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 129344894
- Full Text :
- https://doi.org/10.1002/anie.201713229