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Anionic Biopolymer Assisted Preparation of MoO2@C Heterostructure Nanoparticles with Oxygen Vacancies for Ambient
Yueyao Du1, Zhifeng He1, Fangwei Ma1
1Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of China. Key Laboratory of Chemical Engineering Processes & Technology for High- efficiency Conversion (College of Heilongjiang Province), School of Chemistry and Material Science. Heilongjiang University, Harbin 150080, China.
Abstract:
Recently, Mo-based metal catalysts are widely applied in the electrocatalytic nitrogen reduction reaction (NRR) due to the lower binding energy between the Mo atom and N atom. The design of a Mo-based catalyst@carbon heterostructure and the introduction of anion vacancies are effective measures to improve their NRR performance. In this research, the cross-linked Vo-MoO2@C (Vo means oxygen vacancies) heterostructure nanoparticles with rich oxygen vacancies are first synthesized via pectin assisted hydrothermal reaction followed by calcination and treating with NaBH4 solution. Vo-MoO2@C exhibits good electrocatalytic NRR performance with an ammonia yield rate of 9.75 μg h-1 mg-1 at -0.5 V (RHE) and a Faraday efficiency (FE) of 3.24% at -0.3 V (RHE) under ambient conditions.
