Deng Bohan, Long Yuanzheng, Yang Cheng, Du Peng, Wang Ruyue, Huang Kai, Wu Hui
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, P. R. China.
State Key Laboratory of Information Photonics and Optical Communications & School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, P. R. China.
Chem Commun (Camb). 2021 Aug 5;57(63):7830-7833. doi: 10.1039/d1cc01999f.
Efficient electrocatalysts are in great demand for renewable energy storage systems. Herein, we propose an ultrafast heating strategy to fabricate an efficient Ir/CP-UH catalyst for the oxygen evolution reaction (OER). Experimental results demonstrated that the ultrasmall Ir nanoparticles (≈1-3 nm) and clusters (<1 nm) were highly dispersed on the carbon paper support after a short thermal shock (∼5 s). The catalyst showed a low overpotential of 260 mV at 10 mA cm-2 and remarkable mass activity of about 13.8 times higher than that of the current state-of-the-art commercial Ir/C catalyst. This ultrafast heating strategy can also be applied to other catalyst systems for OER and other electrochemical reactions.
高效的电催化剂在可再生能源存储系统中有着巨大的需求。在此，我们提出一种超快加热策略来制备用于析氧反应（OER）的高效Ir/CP-UH催化剂。实验结果表明，经过短暂的热冲击（约5秒）后，超小的Ir纳米颗粒（≈1-3纳米）和团簇（<1纳米）高度分散在碳纸载体上。该催化剂在10 mA cm-2时具有260 mV的低过电位，并且质量活性比目前最先进的商业Ir/C催化剂高约13.8倍。这种超快加热策略也可应用于其他用于OER和其他电化学反应的催化剂体系。
