Li Guoqiang, Jia Hongrui, Liu Huan, Yang Xin, Lin Meng-Chang
College of Energy Storage Technology, Shandong University of Science and Technology Qingdao 266590 China
Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences Qingdao 266101 China.
RSC Adv. 2022 Oct 11;12(45):28929-28936. doi: 10.1039/d2ra05374h.
Reducing the Ir consumption without compromising the catalytic performance for the oxygen evolution reaction (OER) is highly paramount to promote the extensive development of the environmentally-friendly solid polymer electrolyte water electrolysis (SPEWE) system. Herein, TiO is doped with N through facile NH gas treatment and innovatively employed to support IrO nanoparticles towards acidic OER. N-doping action not only dramatically boosts the electrical conductivity and dispersing/anchoring effects of TiO, but also effectively improves the electron-transfer procedure. As a result, the IrO /N-TiO electrocatalyst exhibits prominent catalyst utilization, catalytic activity and stability. Specifically, the overpotential required to deliver 10 mA cm is only 270 mV, and the mass activity climbs to 278.7 A g @ 1.55 V. Moreover, the single cell voltage is only 1.761 V @ 2.0 A cm when adopting IrO /N-TiO as the anode catalyst, which is 44 mV lower than that of the commercial IrO counterpart.
在不影响析氧反应（OER）催化性能的前提下降低铱的消耗对于推动环境友好型固体聚合物电解质水电解（SPEWE）系统的广泛发展至关重要。在此，通过简便的氨气处理对TiO进行氮掺杂，并创新性地用于负载IrO纳米颗粒以用于酸性OER。氮掺杂作用不仅显著提高了TiO的电导率以及分散/锚定效果，还有效改善了电子转移过程。结果，IrO /N-TiO电催化剂表现出卓越的催化剂利用率、催化活性和稳定性。具体而言，提供10 mA cm所需的过电位仅为270 mV，且质量活性在1.55 V时攀升至278.7 A g 。此外，当采用IrO /N-TiO作为阳极催化剂时，单电池电压在2.0 A cm时仅为1.761 V，比市售IrO对应物低44 mV。
