3DIr4E: Three-Dimensional low Ir loading anodes For proton exchange membrane water Electrolyzers

3DIr4E：用于质子交换膜水电解槽的三维低 Ir 负载阳极

• 批准号: EP/Z001382/1
• 负责人: Shangfeng Du
• 金额: $ 26.26万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FZ001382%2F1
• 关键词: 3DIr4E; Three; Dimensional; low; Ir; 3DIr4E; Three; Dimensional; low; Ir

Proton exchange membrane (PEM) water electrolyzers hold great significance for renewable energy storage and conversion. However, the oxygen evolution reaction (OER) at the anode has intrinsically sluggish kinetics due to the involvement of multiple proton-coupled electron transfer steps, which is one of the main roadblocks that hinder the practical application of PEM water electrolyzers. Thus, highly active, cost-effective, and durable electrocatalysts are indispensable for lowering the high kinetic barrier of OER to achieve boosted reaction kinetics, so that to improve the overall device efficiency and decrease the applied voltage. To date, only Iridium (Ir) based materials possess adequate corrosion resistance to meet the harsh acidic and oxidative environment of the PEM electrolyzers. Unfortunately, their high degree of scarcity and relatively low OER activity greatly hinder their industrial mass applications. Therefore, the establishment of new strategies for catalyst electrode design and optimization to minimize the Ir metal content while preserving a high activity and stability of OER is of great significance for PEM electrolyzers. Herein, the 3DIr4PEMWE project aims to develop a 3D ordered anode design based on 1D IrO2 nanostructure arrays decorated with atomically dispersed Ru and Sr single atoms catalysts (denoted Ru-Sr doped IrO2). This unique architecture can effectively circumvent the drawbacks of the electrodes based on ultrafine particulate catalysts, including the activity loss due to the low catalyst utilization, and the activity decline owing to particle dissolution and aggregation during the operation, thus simultaneously improved Iridium mass activity, structural stability and mechanical strength will be achieved for the oxygen electrodes during operation. We believe the EU-funded 3DIr4PEMWE project will accelerate the industrialization of PEM water electrolyzer technology and realize the aspiring hydrogen energy society as soon as possible

质子交换膜（PEM）水电解层对于可再生能源存储和转换具有重要意义。然而，由于多个质子耦合电子传递步骤参与，阳极处的氧气进化反应（OER）具有本质上的动力学，这是阻碍PEM水解器实际应用的主要障碍之一。因此，高度活跃，具有成本效益且耐用的电催化剂是必不可少的，对于降低OER的高动力学屏障以实现增强的反应动力学，因此可以提高整体设备效率并降低施加的电压。迄今为止，只有虹膜（IR）材料具有足够的耐腐蚀性，以满足PEM电解器的酸性和氧化环境。不幸的是，他们的高度稀缺性和相对较低的OER活动极大地阻碍了他们的工业群众应用。因此，建立用于催化剂电极设计和优化的新策略，以最大程度地减少IR金属含量，同时保留高活性和OER的稳定性对于PEM电解液具有重要意义。在此，3DIR4PEMWE项目旨在开发基于1D IRO2纳米结构阵列的3D订购阳极设计，该阵列装饰有原子分散的RU和SR单原子催化剂（表示RU-SR掺杂IRO2）。这种独特的结构可以有效地基于超细颗粒催化剂的电极缺点，包括由于催化剂利用率较低而导致的活性损失，并且由于操作过程中粒子溶解和聚集而导致的活性下降，因此在运行过程中，氧气的结构稳定性和机械强度将同时提高虹彩质量活性和机械强度。我们认为，由欧盟资助的3DIR4PEMWE项目将加速PEM水电解仪技术的工业化，并尽快实现有抱负的氢能协会