Engineering Nanoparticulate Organic Photocatalysts via a Scalable Flash Nanoprecipitation Process for Efficient Hydrogen Production.
Engineering Nanoparticulate Organic Photocatalysts via a Scalable Flash Nanoprecipitation Process for Efficient Hydrogen Production.
复制标题
DOI：
10.1002/anie.202104233
复制
发表时间：
2021-04
影响因子：
--
通讯作者：
Miaojie Yu;Weiwei Zhang;Zhiqian Guo;Yongzhen Wu;Weihong Zhu
中科院分区：
文献类型：
--
作者：
Miaojie Yu;Weiwei Zhang;Zhiqian Guo;Yongzhen Wu;Weihong Zhu
使用微粒光催化剂将太阳光直接转化为氢燃料是清洁能源供应的一条可持续的途径。有机半导体是一种极具吸引力的候选材料，但在材料内部存在大的激子“死区”，严重限制了其催化性能。在这里，我们展示了一种简单的策略，将可扩展的闪光纳米沉淀法(FNP)与亲水性聚合物(PC-PEG5和PS-PEG5)相结合，在不使用表面活性剂的情况下制备高效的纳米光催化剂。值得注意的是，纳米PC-PEG5的析氢速率(HER)提高了70倍，经FNP处理的PS-PEG5在全光谱太阳光照射下的析氢速率峰值达到37.2mmolh-1g-1，这是聚合物光催化剂中最高的结果之一。此外，随着FNP的连续运行，纳米催化剂的规模化生产也被证明，这为颗粒型光催化剂的可持续能源生产的实际应用提供了前所未有的战略。
Directly converting sunlight into hydrogen fuels using particulate photocatalysts represents a sustainable route for clean energy supply. Organic semiconductors have emerged as attractive candidates but always suffer from optical and exciton recombination losses with large exciton "dead zone" inside the bulk material, severely limiting the catalytic performance. Herein, we demonstrate a facile strategy that combines a scalable flash nanoprecipitation (FNP) method with hydrophilic soluble polymers ( PC-PEG5 and PS-PEG5 ) to prepare highly efficient nanosized photocatalysts without using surfactants. Significantly, a 70-fold enhancement of hydrogen evolution rate (HER) is achieved for nanosized PC-PEG5 , and the FNP-processed PS-PEG5 shows a peak HER rate of up to 37.2 mmol h -1 g -1 under full-spectrum sunlight irradiation, which is among the highest results for polymer photocatalysts. Moreover, a scaling-up production of nanocatalyst is demonstrated with the continuously operational FNP, which provides an unprecedented strategy toward practical applications of particulate photocatalysts for sustainable energy production.