Home > News > Advanced functional materials: Construction and regulation of interface engineering to improve the performance of cop electrocatalytic water decomposition

Advanced functional materials: Construction and regulation of interface engineering to improve the performance of cop electrocatalytic water decomposition

wallpapers News 2020-09-16

electrochemical water decomposition is an important promising hydrogen production technology but its reaction kinetics is slow. Therefore it is urgent to develop efficient stable low-cost electrocatalysts to replace noble metal electrocatalysts so as to accelerate the water decomposition process reduce the reaction overpotential. Researchers have developed a variety of her / oer bifunctional electrocatalysts including sulfide selenide boride so on but their catalytic activity needs to be improved. Interface engineering is an effective strategy to improve the catalytic activity of water decomposition. Interface engineering can significantly improve the intrinsic activity of water decomposition by adjusting the electron density through the electronic structure electron transfer ability active site density of the modified materials. Previous studies have reported that cerium dioxide (CeO2) has a conversion process between Ce3 Ce4 which provides the possibility of electronic interaction with other materials to establish interfaces. Therefore although CeO2 itself shows poor catalytic performance it has the potential to improve the catalytic performance. In addition vanadium (V) can adjust the electron density of the active center. Therefore we can try to build adjust the interface by coupling V CeO2 in cop to enhance the intrinsic activity of the catalyst so as to make full use of the characteristics of CeO2 V to promote the electronic interaction accelerate the process of water decomposition.

recently Jiao Lifang of Nankai University reported the latest research results of bifunctional electrocatalysts. By building V-CoP@a-CeO2 A novel hybrid nano array structure was synthesized integrated into carbon cloth to prepare bifunctional electrocatalyst( V-CoP@a-CeO2 NRA / CC) is used for efficient electrolytic water decomposition. The current density of 10 100 Ma cm-2 can be achieved when the cell voltage is 1.56 V 1.71 V respectively. The synergistic effect between V as electron donor CeO2 can increase the electron density of active site Co thus further optimizing the Gibbs free energy (Δ GH *) of adsorbed hydrogen (h *). At the same time V-CoP@a-CeO2 It has a lower water adsorption / dissociation energy which can accelerate the reaction kinetics in alkaline medium.


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