Preparation and application of a carbon-coated co-ru nanomaterial with hollow structure

Abstract

The invention discloses a carbon-coated Co-Ru nanomaterial with a hollow structure, which uses ZIF-67 as a supporting material precursor and supports Ru 3+ , use dopamine hydrochloride for bonding and coating, and carbonize at high temperature to obtain a carbon-coated Co-Ru nanomaterial with a hollow structure; the carbon-coated hollow-structure nanomaterial is carbonized ZIF-67, that is, ZIF-Co is The framework is doped with Ru, the microstructure of the obtained material is a hollow structure, and the obtained material is magnetic. The preparation method includes the following steps: 1) preparation of ZIF-67; 2) preparation of ZIF-Ru@PDA compound; 3) preparation of Co-Ru@C. Application as a catalyst for hydrogen production by hydrolysis of borohydride, the maximum hydrogen production rate is 9815.82 mL∙min ‑1 g ‑1 , the hydrogen release amount is 100% of the theoretical value, and the activation energy of catalytic hydrogen release is Ea=26.90 kJ∙mol ‑1 ; After 25 recoveries / reuses, 66% of the initial catalytic activity was retained. Therefore, the present invention improves the stability of the catalyst and has broad application prospects in the fields of hydrogen production materials, fuel cells and the like.

Description

technical field [0001] The invention relates to the technical field of catalyzing the hydrolysis of sodium borohydride to produce hydrogen, in particular to the preparation and application of a carbon-coated Co-Ru nanomaterial with a hollow structure. Background technique [0002] Over the next 50 years, global energy demand will further increase, while fossil fuels will continue to dominate global energy production, ultimately leading to increased global warming greenhouse gas emissions. Considering its high energy density and zero emissions, hydrogen is considered one of the most promising alternatives to fossil fuels. Hydrogen is basically produced in industry from oil, natural gas and coal. However, by-products from the production process can contain carbon pollutants that contribute to the greenhouse effect. In recent years, due to the hydrogen-rich hydride (NH 3 BH 3 , NaBH 4 , MgH 2 Hydrogen generated from the hydrolysis of ) has attracted increasing attention d...

AI Technical Summary

Problems solved by technology

[0008] (1) The existing noble metal catalysts for hydrogen production by hydrolysis of sodium borohydride are expensive to prepare, have limited reserves and cannot be practically applied;

[0009] (2) The existing non-precious metal catalysts for hydrogen production by hydrolysis of sodium borohydride have poor stability, are prone to problems such as agglomeration, oxidation, and shedding, and have poor cycle performance

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