Photothermal contributions to H-Pd system

Temperature is one of the most critical parameters to control reaction process, increasing reaction temperature can promote the activity of the catalyst. Thus, a high priority will be to effectively accelerate the chemical reaction and improve the efficiency of chemical reaction by using appropriate means to raise reaction temperature. Herein, hydrogenpalladium (H-Pd) reaction, as a reversible reaction, is the internal physicochemical mechanism of Pd-catalyzed hydrogen purification and Pd-based hydrogen detection. According to temperature dependence of H-Pd reaction, it is significance to develop an H-Pd reaction temperature enhancement scheme to accelerate reaction and improve reaction efficiency, which is important to design/optimize Pd-based hydrogen sensor and understand the relationship between reaction course and temperature. Therefore, we demonstrate an all-optical H-Pd reaction temperature enhancement scheme assisted by photothermal effect. In addition, for analyzing the relation between H-Pd reaction and temperature, we designed an optics-mechanics coupling-based fiber hydrogen sensor, it can convert the influence of photothermal-induced reaction temperature raising on H-Pd reaction to its hydrogen response. These experimental results demonstrate that this proposed photothermal effect-assisted reaction temperature enhancement scheme can be used as an effective strategy to improve H-Pd reaction, and it has the great potential to achieve significant performance improvements of hydrogen detection. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.