Efficient and Full-Spectrum Photothermal Dehydrogenation of Ammonia Borane for Low-Temperature Release of Hydrogen

被引：44

作者：

Huang, Hanlin ^{[1
]}

Wang, Cong ^{[1
]}

Li, Qi ^{[1
]}

Wang, Ruiqi ^{[1
]}

Yang, Yuying ^{[1
]}

Muhetaer, Aidaer ^{[1
]}

Huang, Fuqiang ^{[1
,2
]}

Han, Bing ^{[3
]}

Xu, Dongsheng ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China

[2] Fuzhou Univ, Key Lab Ecomat Adv Technol, Coll Mat Sci & Engn, Fuzhou 350108, Peoples R China

[3] Peking Univ, Sch & Hosp Stomatol, Dept Orthodont, Beijing 100081, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2021年 / 31卷 / 08期

基金：

中国国家自然科学基金;

关键词：

ammonia borane; efficient solar‐ driven hydrogen release; full‐ spectrum absorption photothermal material; high‐ density hydrogen storage materials; photothermal activation; THERMAL-DECOMPOSITION; STORAGE;

D O I：

10.1002/adfm.202007591

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Efficient hydrogen release from ammonia borane (AB) with a striking hydrogen content (19.6 wt%) via thermolysis provides a promising pathway for on-board applications utilizing hydrogen energy. However, the sluggish kinetics at low temperatures and high energy consumption of thermal dehydrogenation are major obstacles for hydrogen release from AB. Herein, a novel solar-driven strategy for hydrogen production from AB at low temperature is proposed, in which Ti2O3 is utilized as a full-spectrum light absorber for photothermal-activating solid-state AB reactants to produce hydrogen. Through a reduction transformation method, nanoscale Ti2O3 particles with high chemical stability and narrow band gap are prepared, realizing a rapid production of 2.0 equivalents of hydrogen from AB at ambient temperature, with an excellent recyclable and full-spectrum-responsive photothermal dehydrogenation. Importantly, a record high photothermal activation efficiency of 35% is achieved with nanoscale Ti2O3 particles due to an enhanced local photothermal effect contributed by improved light absorption and decreased thermal conduction. Moreover, assisted with CuCl2 promoter, a release of 2.0 equivalents of hydrogen under 1.0 solar irradiation at 70 degrees C is successfully achieved, revealing its potential applications in practical vehicles based on proton exchange membrane fuel cells.

引用

页数：9