文献类型：期刊文献

英文题名：Surface-rough PtNi alloys loaded on Mo, C-doped TiO2 nanoflowers as efficient and durable catalyst for oxygen reduction reaction in strong acidic medium

作者：Su, Yong-Zhi[1];Yang, Kun-Zu[1];Guo, Peng-Peng[1];Liu, Xin[1];Wei, Ping-Jie[1];Xu, Chao[2];Liu, Jin-Gang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：31

期号：6

起止页码：6081

外文期刊名：IONICS

收录：;EI(收录号：20251718291312);WOS:【SCI-EXPANDED(收录号:WOS:001473391200001)】；

基金：This study was financially supported by the National Natural Science Foundation of China (no. 21571062), the Program for Professor of Special Appointment (Eastern Scholar) at the Shanghai Institutions of Higher Learning, and the Fundamental Research Funds for the Central Universities (no. 222201717003).

语种：英文

外文关键词：TiO2 nanoflower; PtNi rough alloy; Oxygen reduction reactions; Metal support interaction

摘要：Developing high performance Pt-based catalyst for oxygen reduction reactions (ORR) is urgent for the large-scale application of proton exchange membrane fuel cells (PEMFCs). The stability of Pt-based catalyst is extremely restricted for its carbon support corrosion and the accompanied Pt dissolution under PEMFCs' working conditions. Herein, we synthesized a PtNi/10% Mo, C-TiO2 catalyst by in situ loading rough PtNi nanoalloys onto the Mo, C co-doped TiO2 nanoflowers. The interactions between PtNi alloys and TiO2-based support, which can be effectively adjusted by the incorporation of Mo and C dopants, modulated the electronic state on the Pt surface and inhibited the dissolution of PtNi nanoparticles, leading to outstanding performance for the ORR in 0.1 M HClO4 solution. The half wave potential (E1/2) of PtNi/10% Mo, C-TiO2 achieved 0.906 V vs. RHE, which is 51 mV higher than commercial 20 wt % Pt/C. Moreover, the mass activity (MA @0.9 V vs. RHE) of PtNi/10% Mo, C-TiO2 reached 4.0 times higher than 20 wt % Pt/C. After 10,000 cycles accelerated degradation test (ADT) between 0.6 V and 1.0 V, PtNi/10% Mo, C-TiO2 only showed 5.6% and 1.9% degradation on MA and SA, expressing excellent stability under acidic condition. This work offered an effective approach to develop efficient and stable non-carbon supported Pt catalyst for ORR under strong acidic conditions.