Large-Scale Synthesis of Spinel NixMn3-xO4 Solid Solution Immobilized with Iridium Single Atoms for Efficient Alkaline Seawater Electrolysis

被引：59

作者：

Wen, Ning ^{[1
]}

Xia, Yuguo ^{[1
]}

Wang, Haihua ^{[1
]}

Zhang, Dongpeng ^{[2
]}

Wang, Haimei ^{[1
]}

Wang, Xiang ^{[1
]}

Jiao, Xiuling ^{[1
]}

Chen, Dairong ^{[1
]}

机构：

[1] Shandong Univ, Sch Chem & Chem Engn, Natl Engn Res Ctr Colloidal Mat, Jinan 250100, Shandong, Peoples R China

[2] Nankai Univ, MOE Key Lab Pollut Proc & Environm Criteria, Tianjin Key Lab Environm Remediat & Pollut Contro, Coll Environm Sci & Engn, Tianjin 300350, Peoples R China

来源：

ADVANCED SCIENCE | 2022年 / 9卷 / 16期

基金：

中国国家自然科学基金;

关键词：

Ir single atoms; NixMn3-xO4; OER; seawater electrocatalyst; sol-gel method; OXYGEN EVOLUTION; ELECTROCATALYSTS; GENERATION; HYDROGEN; NIMN2O4;

D O I：

10.1002/advs.202200529

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Seawater electrolysis not only affords a promising approach to produce clean hydrogen fuel but also alleviates the bottleneck of freshwater feeds. Here, a novel strategy for large-scale preparing spinel NixMn3-xO4 solid solution immobilized with iridium single-atoms (Ir-SAs) is developed by the sol-gel method. Benefitting from the surface-exposed Ir-SAs, Ir-1/Ni1.6Mn1.4O4 reveals boosted oxygen evolution reaction (OER) performance, achieving overpotentials of 330 and 350 mV at current densities of 100 and 200 mA cm(-2) in alkaline seawater. Moreover, only a cell voltage of 1.50 V is required to reach 500 mA cm(-2) with assembled Ir-1/Ni1.6Mn1.4O4||Pt/C electrode pair under the industrial operating condition. The experimental characterizations and theoretical calculations highlight the effect of Ir-SAs on improving the intrinsic OER activity and facilitating surface charge transfer kinetics, and evidence the energetically stabilized *OOH and the destabilized chloride ion adsorption in Ir-1/Ni1.6Mn1.4O4. This work demonstrates an effective method to produce efficient alkaline seawater electrocatalyst massively.

引用

页数：10