Main contents of thesis: Introdution of fuel cell and studies on Pt catalysts and Pt alloy catalysts in PEMFC. Research on synthesis of catalytic materials Pt/C 20% wt. by electroless deposition method and evaluating to influence of experimental parameters such as pH, temperature... in the synthesis process on the properties of catalyst Pt / C 20%wt.
MINISTRY OF EDUCATION VIETNAM ACADEMY OF AND TRAINING SCIENCE AND TECNOLOGY GRADUATE UNIVERSITY OF SCIENCE AND TECHNOLOGY - DO CHI LINH SYNTHESIS AND CHARACTERIZATION OF CARBON SUPPORTED PT AND PT ALLOY NANOPARTICLES AS ELECTROCATALYSTS MATERIAL FOR PROTON EXCHANGE MEMBRANE FUEL CELL Major: Metal Science Code: 62.44.01.29 SUMMARY OF MATERIALS SCIENCE DOCTORAL THESIS Hanoi – 2018 PREFACE Proton exchange membrane fuel cell (PEMFC), a potential renewable energy source in the near future, has been considerablely studied in the world The advantages of the PEMFCs are low temperature operation, high conversion efficiency, fast startup, low temperature operation ( Pt3Fe1/C> Pt/C The best catalyst Pt3Ni1/C had high performance with particle size of about 2.8nm and ESA electrochemical surface area of 76.14 m2/g The current density value of Pt3Ni1/C alloy catalyst at 0.9V achieved about -349.3 µA/cm2 while the current density value of pure metal catalyst Pt/C is just - 35.1 µA/cm2 This material was suitable to serve as cathode electrode material in PEM fuel cell Content of Ni metal and heat treatment process affect considerably on properties of PtNi/C alloy catalyst material As increasing the Ni content, structure of alloy is changed and the rate of ORR on PtNi/C alloy catalyst surface decreased In sintering process, as increasing temperature, durability of alloy catalyst increased and the best temperature for sintering process was 700°C Based on the balance between the economy and activity, the Pt1Ni1/C alloy catalyst was potential material serving as cathode electrode material for PEMFC A single PEMFC fuel cell with active area of 5cm2 was designed and fabricated Use of Pt/C 20wt and Pt3Ni1/C 20%wt catalysts serving as anode and cathode materials respectively, the maximum power density of a single PEMFC fuel cell reached about 624 mW/cm2 while with commercial catalysts, the single cell reached just maximum power density of 543 mW/cm2 NEW DISTRIBUTIONS OF THESIS The Pt/C catalysts nanoparticles with high performance were synthesized by ethylene glycol method and NaBH4 assisted ethylene glycol method Under experimental condition, an optimum procedure to synthesis the catalysts Pt/C 20%wt was suggested in scale of 200mg/batch The alloy catalyst nanoparticles Pt-M/C (with M = Ni Co and Fe) was synthesized by NaBH4 assisted ethylene glycol method The catalysts PtNi/C expressed high activity for oxygen reduction reaction and therefore this catalyst was high potential to serve as cathode electrode in PEMFC 3 Used the synthesized catalysts, the first time in Vietnam, a PEMFC single cell having active area of 5cm2 was designed, fabricated and assembled with maximum power density of approximately 624mW/cm2 PUBLICATIONS Chi Linh Do, Thy San Pham, Ngoc Phong Nguyen and Viet Quan Tran Properties of Pt/C nanoparticle catalysts synthesized by electroless deposition for proton exchange membrane fuel cel.l Adv Nat Sci.: Nanosci Nanotechnol (2013) 035011 (5pp) Đỗ Chí Linh, Phạm Thy San, Giang Hồng Thái, Nguyễn Ngọc Phong, Trần Việt Quân Nghiên cứu đánh giá tính chất vật liệu xúc tác Pt/C dùng pin nhiên liệu màng trao đổi proton Tạp chí Hóa học số 2AB51,2013, trang 39-44 Đỗ Chí Linh, Phạm Thy San, Nguyễn Ngọc Phong, Phạm Hồng Hạnh, Trần Việt Quân Nghiên cứu đánh giá vật liệu xúc tác hợp kim PtNi/C cho phản ứng khử ôxy pin nhiên liệu màng trao đổi proton Tạp chí Hóa học T.51 3AB, 2013, trang 176-180 Đỗ Chí Linh, Phạm Thy San Nguyễn Ngọc Phong, Giang Hồng Thái, Trần Việt Quân Sythesis and characterization of electrocatalysts nano particles Pt/MWCNT for PEMFC application Journal of science and technology, Vol 52(3C) (2014), 521-526 Pham Thy San, Vu Dinh Lam, Nguyen Ngoc Phong, Do Chi Linh, Research and development PEM fuel cell at institute of materials science, Proc Of the first VAST-BAS workshop on science and technology, HaLong, November 20th – 21st/2014, 223-232 Chi Linh Do, Thy San Pham, Ngoc Phong Nguyen, Viet Quan Tran and Hong Hanh Pham Synthesis and characterization of alloy catalyst nanoparticles PtNi/C for oxygen reduction reaction in proton exchange membrane fuel cell Adv Nat Sci.: Nanosci Nanotechnol (2015) 025009 (6pp) ... characterization of carbon supported Pt and Pt alloy nanoparticles as electrocatalysts material for proton exchange membrane fuel cell” Scope of thesis: - Research and development of Pt/ C and Pt- M/C alloys... of thesis: - Introdution of fuel cell and studies on Pt catalysts and Pt alloy catalysts in PEMFC - Research on synthesis of catalytic materials Pt/ C 20% wt by electroless deposition method and. .. properties of PtNi/C alloy catalyst material As increasing the Ni content, structure of alloy is changed and the rate of ORR on PtNi/C alloy catalyst surface decreased In sintering process, as increasing