关键词: 纳米材料, NiTe, 固态电解质, 氧还原, 过氧化氢

Hydrogen peroxide has significant applications across various sectors, including industry, healthcare, and wastewater treatment. NiTe nanomaterial has been synthesized using a facile aqueous-phase method in this work. Specifically, 5 mmol of nickel acetate tetrahydrate (Ni(CH₃COO)₂•4H₂O) was dissolved in deionized water and reacted with 10 mmol of tartaric acid to form solution A. Simultaneously, 5 mmol of tellurium dioxide powder was heated in 10 mmol of ammoniated tartaric acid to prepare solution B. Both solution A and B were adjusted to a pH value of 10. Solution B was gradually introduced into solution A under continuous agitation to ensure homogeneous mixing. Subsequently, 7.5 mmol of sodium borohydride (NaBH₄) was added to the mixture under vigorous mechanical stirring, resulting in the formation of a black NiTe precipitate. The research results indicate that, using oxygen and pure water as raw materials, and employing porous cation exchange resins as solid-state electrolyte in the electrolyzer, the Faradaic efficiency of H₂O₂ reaches 85% at a potential of 0.31 V (vs. RHE) and maintains a Faradaic efficiency of over 80% within a potential window of 200 mV. Additionally, at 0.11 V (vs. RHE), the H₂O₂ production rate can reach 4334.39 mmol•h^-1•g^-1. In stability assessments, the NiTe catalyst exhibited continuous and stable H₂O₂ production for over 6 h. The electronic structure modulation effect of Te in the NiTe catalyst, combined with abundant grain boundaries and defect sites, as well as the small particle size and hybrid porous structure, provides ideal active centers and excellent structural foundation, which endows NiTe with excellent catalytic performance. The application of solid-state electrolyte devices not only significantly reduces costs and operational risks but also enables the direct production of pure hydrogen peroxide solution, thereby improving production efficiency. This research offers a new approach for the efficient electrochemical production of hydrogen peroxide from oxygen.

Key words: nanomaterial, NiTe, solid electrolyte, oxygen reduction, hydrogen peroxide