High-Performance Electrohydrogenation of N2 to NH3 Catalyzed by Multishelled Hollow Cr2O3 Microspheres under Ambient Conditions
By Ya Zhang, Weibin Qiu, Yongjun Ma, Yonglan Luo, Ziqi Tian, Guanwei Cui, Fengyu Xie, Liang Chen, Tingshuai Li, Xuping Sun. ACS Catalysis, 2018
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Electrohydrogenation of N2 to NH3 is emerging as an environmentally benign strategy to tackle the issues associated with the energy-intensive, CO2-emitting Haber–Bosch process. However, the method is severely challenged by N2 activation and needs efficient N2 reduction reaction (NRR) catalysts. Here, we report that multishelled hollow Cr2O3 microspheres (MHCMs), which are synthesized by a facile synthetic route, can serve as efficient and selective non-noble metal electrocatalysts for NRR. In 0.1 M Na2SO4 solution, the MHCMs achieve a high Faradaic efficiency (6.78%) and a large NH3 yield (25.3 μg h–1 mgcat–1) at −0.9 V vs reversible hydrogen electrode. The MHCMs also exhibit high stability during the reaction. Density functional theory calculations suggest that NRR over MHCMs occurs via both distal associative and partially alternative routes.
Subfields: Catalysis, Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/b453adbbefe0d1ec2683889047ae0f2febc787bf
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In Materials Chemistry
Citations in the corpus
- Review on photocatalytic and electrocatalytic artificial nitrogen fixation for ammonia synthesis at mild conditions: Advances, challenges and perspectives (2019, methodology): “Lately, multishelled hollow Cr2O3 microspheres were also used for electrocatalytic NRR in neutral electrolytes [140], delivering a Faradaic efficiency of 6.”