China energy storage net news: recently, the institute of solid state physics, Chinese academy of sciences, hefei material science research institute of environmental and energy researchers of nanometer materials center, oxidative degradation Reaction with Urea (Urea Oxidation Reaction, UOR) replace high overpotential of Oxygen precipitation Reaction (Oxygen Evolution Reaction, OER) for the train of thought, designed and developed a new type of energy saving of rechargeable zinc air battery;
At the same time, the hydrogenation technology of electrocatalytic electrolysis was developed based on this idea.
This provides new ideas for the design of new energy-saving metal-air battery devices and the development and utilization of clean hydrogen energy.
The results were published in Electrochimica Acta and Chemical Communications.
Design and development of new type, efficient and environmentally friendly energy devices and techniques, such as metal zinc - air batteries, hydrogen fuel cells, electric catalytic decomposition of aquatic products, etc., are advanced to realize the sustainable one of the important research contents of the development of clean energy technologies.
In order to realize the practical application of these new energy devices and technology and commercialization, the researchers committed to the development of all kinds of efficient electric catalyst materials, which further increases the battery device (such as fuel cells, zinc - empty battery) or reduce the performance of electric catalytic decomposition of hydrogen voltage, thus effectively improve the efficiency of electrochemical energy storage and conversion.
Non-noble metal catalysts electricity (transition metal catalyst, carbon catalyst, etc.) the design and development and utilization of significant achievements, but its high electric catalytic oxygen precipitation (OER) overpotential and slow dynamic response process, restricted rechargeable battery technology air and water electrolysis hydrogen energy technology development.
Study found that, compared with the thinking of the pursuit to design efficient OER the electricity catalyst, using a more efficient and environmentally friendly oxidation reaction (such as the oxidation reaction of urea UOR) to replace the low efficiency of oxygen precipitation reaction is the new development ideas.
In view of this, the researchers designed and produced multifunctional mn-ni (OH)2/CFC catalyst material, which was assembled into a rechargeable metal-zinc air battery.
By comparison, the use of UOR to replace the zinc-null battery device of OER can effectively reduce the charging voltage (about 0.3V) of the zn-air battery during the charging process, thus saving the energy consumption by 12 to 21 percent.
The high efficiency Ni2P/CFC catalyst was applied to the hydrogenation of electrocatalytic decomposition, and it was found that the voltage of electrolyte electrolysis of two electrodes was reduced after the UOR was replaced by the UOR (about 0.2 V).
The electrolyte can be used as electrolyte to efficiently produce hydrogen with electrolyte. The initial potential of electrolysis hydrogenation is much lower than the current reported high efficient OER base electrolytic hydrogen production voltage, which is only 1.33 V.
The above research results provide new ideas for designing and developing efficient electrochemical related energy devices and technologies, showing practical application value.