Applied Catalysis2022，Vol.30411.DOI:10.1016/j.apcatb.2021.121001

All room-temperature synthesis, N-2 photofixation and reactivation over 2D cobalt oxides

Lu, Haijiao Zhao, Yi-Ming Saji, Sandra Elizabeth Yin, Xinmao Wibowo, Ary Tang, Chi Sin Xi, Shibo Cao, Pengfei Tebyetekerwa, Mike Liu, Borui Heggen, Marc Dunin-Borkowski, Rafal E. Tricoli, Antonio Wee, Andrew T. S. Nguyen, Hieu T. Yan, Qing-Bo Yin, Zongyou
Applied Catalysis2022，Vol.30411.DOI:10.1016/j.apcatb.2021.121001
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  • NSTL
  • Elsevier

All room-temperature synthesis, N-2 photofixation and reactivation over 2D cobalt oxides

Lu, Haijiao 1Zhao, Yi-Ming 2Saji, Sandra Elizabeth 1Yin, Xinmao 3Wibowo, Ary 1Tang, Chi Sin 4Xi, Shibo 4Cao, Pengfei 5Tebyetekerwa, Mike 6Liu, Borui 1Heggen, Marc 5Dunin-Borkowski, Rafal E. 5Tricoli, Antonio 1Wee, Andrew T. S. 4Nguyen, Hieu T. 1Yan, Qing-Bo 2Yin, Zongyou1
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作者信息

  • 1. Australian Natl Univ
  • 2. Univ Chinese Acad Sci
  • 3. Shanghai Univ
  • 4. Natl Univ Singapore
  • 5. Forschungszentrum Julich
  • 6. Univ Queensland
  • 折叠

Abstract

Ammonia is an indispensable chemical to the ecosystem and human beings. Storing solar energy in N-H bonds in NH3 is a promising sustainable alternative to the energy-consuming Haber Bosch process. However, nitrogen photofixation with this strategy still suffers from several unsolved issues, such as high-energy consumption with carbon footprint, short lifetime of photocatalysts, and nitrogen contamination in redox reactions. In this study, a room-temperature strategy is developed to two-dimensionally assemble the diminutive CoO-Co3O4 mixed-oxide composites on reduced graphene oxide. They proffer great surface area and deep-red-light absorbing defect states, which enable them to exhibit over 14 times higher photoactivity than template-free single components. The unveiled photoreaction-induced cation oxidation is reversely triggerable by photo-reactivating Co3O4 back to active CoO, with well-maintained photoactivity after six-cycles. All these room-temperature processes, from catalyst synthesis, nitrogen photofixation, to catalyst reactivation, offer facile way towards upscaling and hold great promise for practical zero-emission N-2 photofixation.

Key words

Room temperature/Two-dimensional assembly/Diminutive cobalt oxides/N2 photofixation/N-15 isotope/NITROGEN-FIXATION/WATER/EFFICIENT/REDUCTION/COO/PHOTOCATALYST/CARBON/DEPENDENCE/AMMONIA/CO3O4

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出版年

2022
Applied Catalysis

Applied Catalysis

ISSN：0926-3373
被引量6
参考文献量53
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