Solution Combustion Synthesis of a Y0.87Ba0.1Zr0.03O1.465 Catalyst for Highly Efficient NO Direct Decomposition at High Temperatures

In this study, a highly active Y0.87Ba0.1Zr0.03O1.465 catalyst with a substantial specific surface area was synthesized by using the glycine self-propagation combustion method. The catalytic activities of the catalyst were evaluated in a fixed-bed reactor. Results show that the catalyst’s activity exhibited a positive correlation with temperature within the range of 500–1100 °C. Upon introducing 10% O2 to the inlet reaction gas, an average decrease of approximately 10% in NO conversion was observed. The catalyst exhibited remarkable stability during long-term operation and frequent atmosphere changes. Characterization tests performed on the catalyst treated at different heating temperatures unveiled catalysts agglomeration above 900 °C, causing the collapse of the pore network structure and a reduction in specific surface area. Nevertheless, the elevated temperatures facilitated interactions among the catalyst components, generating oxygen vacancies and enhancing the catalyst’s oxygen mobility. Consequently, the utilization of the glycine combustion synthesis method for the preparation of a Y0.87Ba0.1Zr0.03O1.465 composite catalyst holds immense potential for catalytic NO direct decomposition.