Electrocatalyst of ruthenium-based transition metal oxide solid solution as well as preparation method and application thereof

Abstract

The invention relates to the technical field of energy chemical industry and nano materials, and discloses an electrocatalyst of a ruthenium-based transition metal oxide solid solution as well as a preparation method and application of the electrocatalyst. The electrocatalyst is a solid solution with a rutile type structure, the chemical formula of the electrocatalyst is M1-xRuxO2, M is manganese,vanadium or chromium, x is the number of ruthenium atoms, and x is larger than or equal to 0.2 and smaller than or equal to 0.5. The preparation method comprises the following steps: (1) adding a high-valence transition metal salt solution with strong oxidizing property and a ruthenium chloride solution into a transition metal salt solution, and reacting to obtain amorphous oxide powder; and (2)drying and roasting the oxide powder prepared in the step (1) to obtain the ruthenium-based transition metal oxide solid solution. The catalyst has high oxygen evolution reaction activity and stability when applied to water electrolysis oxygen evolution reaction.

Description

technical field [0001] The invention relates to the technical fields of energy, chemical industry and nanomaterials, in particular to an electrocatalyst of a ruthenium-based transition metal oxide solid solution, a preparation method and application thereof. Background technique [0002] The energy problem is a major issue facing human society, and both production and life are inseparable from energy consumption. At present, fossil energy is still widely used, but people pay more and more attention to environmental issues such as global warming. The research and development of green and clean energy technology has replaced traditional fossil energy and has become a research hotspot; electrolysis of water technology is an environmentally friendly and efficient production of green hydrogen. However, the kinetic potential energy of the anode moisture decomposition oxygen reaction is too large, which has been one of the key factors limiting its development. [0003] Under the c...

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Problems solved by technology

Although the invention patent significantly improves the dispersion of noble metal oxides, thus obtaining the TiO 2 or TiO 2 The modified cheap oxide is a highly dispersed noble metal oxide catalyst on the carrier, but the electrocatalytic performance of the carrier oxide is poor, so it cannot be applied to the oxygen evolution reaction of acidic water electrolysis

[0006] CN104492426A discloses a modified manganese dioxide catalyst, a modified manganese dioxide catalyst electrode and a preparation method. The nano-manganese dioxide loaded with fluoride ions and metal ions is prepared by the impregnation method and has a rutile crystal structure at the same time. The catalyst formed on the metal oxide carrier with the oxygen vacancy structure; the modified manganese dioxide catalyst and the electrode have the characteristics of high current efficiency and long service life, and the preparation method is simple to operate and low in cost, which meets industrial production, but due to the The main active site of the catalyst is manganese, its intrinsic oxygen evolution catalytic activity is low, it is difficult to withstand the high current of industrial acidic water electrolysis, and the highly corrosive reaction environment

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