Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 18, Pages 20376-20382Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c00881
Keywords
black silicon; Ag nanoparticles; photoelectrochemical; ammonia
Funding
- National Natural Science Foundation of China [51770000, 21777164, 51802066, 21972027]
- Natural Science Foundation of Anhui Province [1608085QE000]
- Fundamental Research Funds for the Central Universities [JZ2017HGTB000]
- Higher Education Discipline Innovation Project New Materials and Technology for Clean Energy [B18018]
- Opening Foundation of Guangxi Key Laboratory of Electrochemical Energy Materials
- Key Technologies RAMP
- D Program of Anhui Province [1704c0402195]
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Although photoelectrochemical synthesis of NH3 is considered as an ecofriendly and sustainable process under ambient conditions, stable and highly efficient catalysts for the N-2 reduction reaction are still lacking because of the chemically inert nature of the triple bonds in elemental nitrogen and the competitive reaction of water reduction. In this paper, a photoelectrochemical N-2 reduction reaction route is proposed through combining black silicon and Ag nanoparticles using a simple deposition method. The synergetic effect of Ag nanoparticles and black Si significantly enhances the activity for the ammonia evolution reaction. The obtained Ag/bSi photocathode reaches a high Faraday efficiency of 40.6% and an NH3 yield of 2.87 mu mol h(-1) cm(-2) at -0.2 V versus the reversible hydrogen electrode in 0.1 M Na2SO4.
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