Fu Kailin, Chen Weijian, Jiang Feng, Chen Xia, Liu Jianmin
Department of Materials Science and Engineering, Jingdezhen Ceramic University, Jingdezhen 333403, China.
Sichuan Volcational College of Cultural Industries, Chengdu 610213, China.
Molecules. 2023 Oct 16;28(20):7114. doi: 10.3390/molecules28207114.
In light of the depletion of conventional energy sources, it is imperative to conduct research and development on sustainable alternative energy sources. Currently, electrochemical energy storage and conversion technologies such as fuel cells and metal-air batteries rely heavily on precious metal catalysts like Pt/C and IrO, which hinders their sustainable commercial development. Therefore, researchers have devoted significant attention to non-precious metal-based catalysts that exhibit high efficiency, low cost, and environmental friendliness. Among them, perovskite oxides possess low-cost and abundant reserves, as well as flexible oxidation valence states and a multi-defect surface. Due to their advantageous structural characteristics and easily adjustable physicochemical properties, extensive research has been conducted on perovskite-based oxides. However, these materials also exhibit drawbacks such as poor intrinsic activity, limited specific surface area, and relatively low apparent catalytic activity compared to precious metal catalysts. To address these limitations, current research is focused on enhancing the physicochemical properties of perovskite-based oxides. The catalytic activity and stability of perovskite-based oxides in Oxygen Reduction Reaction/Oxygen Evolution Reaction (ORR/OER) can be enhanced using crystallographic structure tuning, cationic regulation, anionic regulation, and nano-processing. Furthermore, extensive research has been conducted on the composite processing of perovskite oxides with other materials, which has demonstrated enhanced catalytic performance. Based on these different ORR/OER modification strategies, the future challenges of perovskite-based bifunctional oxygen electrocatalysts are discussed alongside their development prospects.
鉴于传统能源的枯竭，开展可持续替代能源的研发工作势在必行。目前，诸如燃料电池和金属空气电池等电化学储能与转换技术严重依赖Pt/C和IrO等贵金属催化剂，这阻碍了它们的可持续商业发展。因此，研究人员将大量注意力投入到了具有高效、低成本和环境友好特性的非贵金属基催化剂上。其中，钙钛矿氧化物成本低廉、储量丰富，具有可变的氧化态和多缺陷表面。由于其有利的结构特性和易于调节的物理化学性质，人们对钙钛矿基氧化物展开了广泛研究。然而，与贵金属催化剂相比，这些材料也存在本征活性差、比表面积有限以及表观催化活性相对较低等缺点。为克服这些限制，当前的研究集中在增强钙钛矿基氧化物的物理化学性质上。通过晶体结构调控、阳离子调控、阴离子调控和纳米加工，可以提高钙钛矿基氧化物在氧还原反应/析氧反应（ORR/OER）中的催化活性和稳定性。此外，人们还对钙钛矿氧化物与其他材料的复合加工进行了广泛研究，结果表明其催化性能得到了增强。基于这些不同的ORR/OER改性策略，本文讨论了钙钛矿基双功能氧电催化剂未来面临的挑战及其发展前景。
