Synthesis of a New Type of CMK-3-Pt with the In-situ Growth Method and Its Characterization

Abstract

Abstract With the growing consumption of fossil energy, fuel cells are now playing an increasingly important role in production and life. However, the battery electrode materials synthesized by traditional methods often have defects such as Pt particle agglomeration and shedding in use which can result in unsatisfactory performance of electrode materials and reduced electrical energy transfer efficiency and electrocatalytic efficiency, thereby leading to lower fuel cell efficiency. In this research, a new method is proposed for synthetizing the most important component of fuel cells—electrode materials, that is, the precursors of C and Pt are simultaneously added to the CMK-3-Pt produced with in-situ grow and one-step synthesis in the SBA-15 template. The elements and micro-areas were characterized by XRD, SEM, TEM and other test methods, and the CHI700E electrochemical workstation was used to test the electrocatalytic activity and electrocatalytic stability. The experimental results show that the Pt particles of electrode materials synthesized by the new method have the characteristics of smaller particle size (4∼6 nm), better dispersion, and less falling off. Besides, these materials have a larger pore volume (0.66 cm3/g), a higher active surface area (803 m2/g, ECSA: 452 cm2/mg), and more excellent electrocatalytic performance (the ratio of peak forward and reverse current: CH3OH catalyst is 1.95, and CH3CH2OH catalyst is 1.38) and better electrocatalytic stability (82.6%). To sum up, electrode materials synthesized once by the in-situ growth method can achieve better performance of the mesoporous electrode materials than those with the traditional synthesis method.