Bai Xiaofang, Zhang Xiuping, Sun Yujiao, Huang Mingcheng, Fan Jiantao, Xu Shaoyi, Li Hui
Department of Materials Science and Engineering, Southern University of Science and Technology, 518055, Shenzhen, Guangdong, China.
Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, 518055, Shenzhen, Guangdong, China.
Angew Chem Int Ed Engl. 2023 Sep 18;62(38):e202308704. doi: 10.1002/anie.202308704. Epub 2023 Aug 10.
To date, only a few noble metal oxides exhibit the required efficiency and stability as oxygen evolution reaction (OER) catalysts under the acidic, high-voltage conditions that exist during proton exchange membrane water electrolysis (PEMWE). The high cost and scarcity of these catalysts hinder the large-scale application of PEMWE. Here, we report a novel OER electrocatalyst for OER comprised of uniformly dispersed Ru clusters confined on boron carbon nitride (BCN) support. Compared to RuO , our BCN-supported catalyst shows enhanced charge transfer. It displays a low overpotential of 164 mV at a current density of 10 mA cm , suggesting its excellent OER catalytic activity. This catalyst was able to operate continuously for over 12 h under acidic conditions, whereas RuO without any support fails in 1 h. Density functional theory (DFT) calculations confirm that the interaction between the N on BCN support and Ru clusters changes the adsorption capacity and reduces the OER energy barrier, which increases the electrocatalytic activity of Ru.
到目前为止，在质子交换膜水电解（PEMWE）过程中存在的酸性、高压条件下，只有少数贵金属氧化物作为析氧反应（OER）催化剂表现出所需的效率和稳定性。这些催化剂的高成本和稀缺性阻碍了PEMWE的大规模应用。在此，我们报道了一种新型的用于OER的OER电催化剂，它由均匀分散在氮化硼碳（BCN）载体上的Ru簇组成。与RuO相比，我们的BCN负载型催化剂显示出增强的电荷转移。在电流密度为10 mA cm时，它表现出164 mV的低过电位，表明其具有优异的OER催化活性。这种催化剂能够在酸性条件下连续运行超过12小时，而没有任何载体的RuO在1小时内就失效了。密度泛函理论（DFT）计算证实，BCN载体上的N与Ru簇之间的相互作用改变了吸附能力并降低了OER能垒，从而提高了Ru的电催化活性。
