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论文类型：期刊论文

发表时间：2020-03-14

发表刊物：NANOSCALE

收录刊物：SCIE

卷号：12

期号：10

页面范围：6029-6036

ISSN号：2040-3364

摘要：Transition metal chalcogenide MoS2 catalysts are highly selective for the electrochemical reduction of dinitrogen (N-2) to ammonia (NH3) in aqueous electrolytes. However, due to the low solubility of N-2 in water, limited N-2 diffusion and mass transport have heavily restricted the yield and the faradaic efficiency (FE). Here, we have demonstrated a highly efficacious assembled gas diffusion cathode with hollow Co-MoS2/N@C nanostructures to significantly improve the electrochemical reduction of N-2 to NH3. Our results revealed that the synthesized Co-MoS2 heterojunctions with abundant graphitic N groups exhibited a superb NH3 yield of 129.93 mu g h(-1) mg(cat)(-1) and a high faradaic efficiency of 11.21% at -0.4 V vs. the reversible hydrogen electrode (RHE), as well as excellent selectivity and stability. The strategy described in this study offers new inspiration to design high-performance electrocatalyst assemblies for the sustainable environmental and energy applications.