Summary of Chemical doctoral thesis: Study and fabbricated electrocatalysts on the IrO2 basis for oxygen evolution reaction in proton exchange membrane water electrolyser

Fabbrication of electrocatalyst materials on the IrO2 basis for oxygen evolution reaction in proton exchange membrane water electrolyser PEMWE; applying to fabbricated proton exchange membrane water electrolyser PEMWE to produce hydrogen.
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Summary of Chemical doctoral thesis: Study and fabbricated electrocatalysts on the IrO2 basis for oxygen evolution reaction in proton exchange membrane water electrolyser MINISTRY OF EDUCATION VIETNAM ACADEMY OF AND TRAINING SCIENCE AND TECHNOLOGY GRADUATE UNIVERSITY SCIENCE AND TECHNOLOGY ------------------------------ Pham Hong Hanh STUDY AND FABRICATED ELECTROCATALYSTS ON THE IrO2 BASIS FOR OXYGEN EVOLUTION REACTION IN PROTON EXCHANGE MEMBRANE WATER ELECTROLYZER Major: Theoretical and Physical Chemistry Code: 9.44.01.19 SUMMARY OF CHEMICAL DOCTORAL THESIS Ha Noi – 2019 The work was completed at : Graduate University Science and Technology – Vietnam Academy of Sicence and Technology Science instructor: Doc. Nguyen Ngoc Phong Doc. Le Ba Thang Reviewer 1: Reviewer 2: Reviewer 3: The thesis will be protected before the doctoral dissertation thesis, meeting at the Academy of Science and Technology - Vietnam Academy of Science and Technology at ... hour ... ', date ... month ... 2019 The thesis can be found at: - Library of the Academy of Science and Technology - National Library of Vietnam 1 PREFACE 1. Urgency of the thesis Population growth and rapid industrialization of countries, especially emerging countries such as China and India, lead to rapid demand for energy worldwide. Currently, more than 80% of energy needs are met from fossil fuel sources such as oil, coal and natural gas because they are available in nature, easily and conveniently in transport and storage. However, fossil fuel sources are gradually exhausted while increasing demand for energy use has been and will threaten the energy security of many countries as well as bring to the seed of one. On the other hand, the use of fossil fuels also creates gas products that pollute the environment. Therefore, the need to develop new and alternative energy sources, capable of regenerating and not polluting the environment is becoming urgent for humankind. Hydrogen is one of the potential new energy sources in the future, hydrogen is the most abundant element, its combustion efficiency is higher than petroleum (60% versus 25%). When burning hydrogen, there is only one by- product, water, without any waste that is harmful to the environment. In short, hydrogen is the cleanest, most efficient and endless source of renewable energy. So hydrogen-based economics will gradually replace the oil economy and will be the most ideal sustainable economy of mankind. There are many ways to produce hydrogen, the proton exchange membrane water electrolysis method (PEMWE) using uses electricity to split the pure water into hydrogen at cathode and oxygen at anode. It is a method with many outstanding advantages: high efficiency (possibly more than 90%), high purity (about 99%), safe, low energy consumption, can operate with high current density (up to 2 A.cm-2) and 1 ability to combine with renewable energy sources such as wind power, solar energy…There are a lot of intensive researches and developments which have been done on PEMWE and commercialized product s(with hydrogen production capacity of 0,01‒50000 Nm3.h-1) were provided by globe companies. However, high cost of investment to use precious and expensive catalysts material has limited their mass commercialization. In addiction, the overpotential loss on anode of PEMWE for oxygen evolution reaction (OER) is still relatively high and this reduce the efficiency of water electrolysis processes. Therefore, in recent PEMWEs research have been focused on new catalysts material in order to improve the anode active surface area, catalyst utilization, and stability by use nanosize powder materials, thereby improving the performance and capacity of PEMWE. In Vietnam, studies of hydrogen production electrolysis using proton exchange membranes have not been given much attention. In order to continue gradually with the hydrogen economy and keep up with the research trend of catalytic materials for PEMWE. Stemming from that reason, the thesis is aimed at: “Study and fabbricated electrocatalysts on the IrO2 basis for oxygen evolution reaction in proton exchange membrane water electrolyser”. 2. Scope of thesis Fabbrication of electrocatalyst materials on the IrO2 basis for oxygen evolution reaction in proton exchange membrane water electrolyser PEMWE. Applying to fabbricated proton exchange membrane water electrolyser PEMWE to produce hydrogen. 2 3. Main contents of thesis - Introduction of proton exchange membrane water electrolyser (PEMWE), research and development of catalytic materials in PEMWE based on IrO2: unary, binary and ternary system. - Introduction of preparation IrO2 powder catalyst by hydrolysis anh Adams method, the effect of temperature on the characteristics of synthetic catalyst materials, from which to choose the method and making the suitable process to sythesis catalyst IrO2. - Stydy on sythesis IrxRu(1-x)O2 (x =0; 0,5; 0,6; 0,7; 0,8; 1) binary mixture powder. Evaluation and comparison of the effect of component ratio RuO2: IrO2 to the activity and durability of catalytic materials. Select the optimal component with high activity and durability. - Research and development of IrRuMO2 ternary catalyst (with M = Ti, Sn and Co). - Applying to fabbricated proton exchange membrane water electrolyser PEMWE with 5 cm2 working area including parts: current collector, separator plate, membrane electrode assembly, shell plate...to produce high-capacity hy ...