天津理工大学鲁统部团队报道了质子交换膜高效电解水用RuO₂的氧阴离子工程。相关研究成果发表在2024年8月12日出版的《德国应用化学》。

在质子交换膜水电解（PEMWE）中，阳极析氧反应（OER）催化剂严重依赖昂贵而稀缺的铱基材料。二氧化钌（RuO₂）具有较低的价格和较高的OER活性，已被探索用于类似的任务，但受到稳定性差的限制。

该文中，研究人员开发了一种阴离子改性策略，以提高RuO₂在酸性介质中的OER性能。基于锚定在RuO₂/MoO₃上的硫酸盐设计的多组分催化剂在10 mA cm^-2下显示出190 mV的低过电位，并稳定运行500小时，降解率极低，为20μV h^-1。当在PEMWE电池中组装时，这种催化剂作为阳极在500 mA cm^-2下显示出150小时的优异稳定性。

实验和理论结果表明，MoO₃可以稳定RuO₂表面的硫酸根阴离子，以抑制其在OER过程中的浸出。这种MoO₃锚定的硫酸盐不仅降低了RuO₂上*OOH中间体的形成能，还阻碍了表面Ru和晶格氧的损失，从而实现了高OER活性和出色的耐久性。

附：英文原文

Title: Oxyanion Engineering on RuO2 for Efficient Proton Exchange Membrane Water Electrolysis

Author: Ying Duan, Lin-Lin Wang, Wen-Xing Zheng, Xiao-Long Zhang, Xiao-Ran Wang, Guo-Jin Feng, Zi-You Yu, Tong-Bu Lu

Issue&Volume: 2024-08-12

Abstract: In proton exchange membrane water electrolysis (PEMWE), the anode oxygen evolution reaction (OER) catalysts rely heavily on the expensive and scarce iridium-based materials. Ruthenium dioxide (RuO2) with lower price and higher OER activity, has been explored for the similar task, but has been restricted by the poor stability. Herein, we developed an anion modification strategy to improve the OER performance of RuO2 in acidic media. The designed multicomponent catalyst based on sulfate anchored on RuO2/MoO3 displays a low overpotential of 190 mV at 10 mA cm-2 and stably operates for 500 hours with a very low degradation rate of 20 μV h-1. When assembled in a PEMWE cell, this catalyst as an anode shows an excellent stability at 500 mA cm-2 for 150 h. Experimental and theoretical results revealed that MoO3 could stabilize sulfate anion on RuO2 surface to suppress its leaching during OER. Such MoO3-anchored sulfate not only reduces the formation energy of *OOH intermediate on RuO2, but also impedes both the surface Ru and lattice oxygen loss, thereby achieving the high OER activity and exceptional durability.

DOI: 10.1002/anie.202413653

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202413653