质子陶瓷电解池应用领域研究进展OA

Proton ceramic electrolytic cells(PCECs)are fully solid-state energy and material conversion devices that,when coupled with renewable clean energy sources such as wind and solar power,can directly convert low-carbon small molecules like ethane and CO2 into high-value-added chemicals(e.g.,green hydrogen,syngas,ethylene,propylene,and ammonia).PCECs have the characteristics of high efficiency,strong adaptability to raw materials,high flexibility,easy assembly,and low site requirements.This not only provides new approaches for utilizing renewable energy but also contributes significantly to CO2 emission reduction.By using a PCEC as an electrochemical reactor,the C—H bonds in ethane molecules can be selectively activated and dissociated through electrochemical means,which enables the synthesis of high-value-added ethylene.However,since the C—H bond in ethane molecules is more stable than the C—C bond,controlling the selectivity and electrocatalytic activity of PCEC anodes has become a bottleneck limiting the practical application of PCECs.The production of green hydrogen by PCECs faces the problems of insufficient long-term stability and high cost.This raises new requirements for the selection and structural optimization of materials for each component of the electrolytic cell(such as oxygen electrodes,hydrogen electrodes,electrolyte,and supports).The propane dehydrogenation process is limited by thermodynamics,the catalyst deactivation caused by rapid coking,and the high energy consumption for separation.Utilizing PCECs for propane dehydrogenation poses new challenges to the catalytic activity and stability of existing electrode materials,e.g.,Ni-based anodes.Traditional ammonia synthesis requires high temperatures to break the N≡N of N2 and high pressure to compensate for the thermodynamic losses caused by the high temperatures,and the production process involves huge carbon emissions,which has driven the development of ammonia synthesis using PCECs under normal pressure.Therefore,the activity,stability,and cost-effectiveness of electrode materials,as well as the safety,durability,and scalability of equipment,still pose challenges for their industrial applications.Based on the latest progress of PCECs in hydrogen production,ethane and propane dehydrogenation,and ammonia synthesis,this paper systematically summarizes the current situation of using PCECs for hydrogen production by water electrolysis,ethane to ethylene(propane to propylene)by electrochemical dehydrogenation,and electrochemical ammonia synthesis,provides a detailed summary and analysis of the design,preparation,and reaction mechanism of electrocatalysts,and looks forward to the future development direction of materials and systems,aiming to provide a sustainable and environmentally friendly solution for comprehensive energy utilization and chemical production.