Banoo Maqsuma, Roy Raj Sekhar, Bhakar Monika, Kaur Jaspreet, Jaiswal Aman, Sheet Goutam, Gautam Ujjal K
Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali, Sector 81, Mohali, SAS Nagar, Punjab140306, India.
Department of Physical Sciences, Indian Institute of Science Education and Research (IISER)-Mohali, Sector 81, Mohali, SAS Nagar, Punjab140306, India.
Nano Lett. 2022 Nov 23;22(22):8867-8874. doi: 10.1021/acs.nanolett.2c02900. Epub 2022 Nov 8.
Piezocatalytic water splitting is an emerging approach to generate "green hydrogen" that can address several drawbacks of photocatalytic and electrocatalytic approaches. However, existing piezocatalysts are few and with minimal structural flexibility for engineering properties. Moreover, the scope of utilizing unprocessed water is yet unknown and may widely differ from competing techniques due to the constantly varying nature of surface potential. Herein, we present BiTaOCl as a representative of a class of layered perovskite oxyhalide piezocatalysts with high hydrogen production efficiency and exciting tailorable features including the layer number, multiple cation-anion combination options, etc. In the absence of any cocatalyst and scavenger, an ultrahigh production rate is achievable (1.5 mmol g h), along with simultaneous generation of value-added HO. The production rate using seawater is somewhat less yet appreciably superior to photocatalytic H production by most oxides as well as piezocatalysts and has been illustrated using a double-layer model for further development.
压电催化水分解是一种新兴的产生“绿色氢气”的方法，它可以解决光催化和电催化方法的几个缺点。然而，现有的压电催化剂很少，并且在工程性质方面结构灵活性极小。此外，利用未处理水的范围尚不清楚，并且由于表面电位的不断变化性质，可能与竞争技术有很大差异。在此，我们展示了BiTaOCl作为一类层状钙钛矿卤氧化物压电催化剂的代表，其具有高制氢效率和令人兴奋的可定制特征，包括层数、多种阳离子-阴离子组合选项等。在没有任何助催化剂和清除剂的情况下，可实现超高产率（1.5 mmol g⁻¹ h⁻¹），同时产生增值的·OH。使用海水的产率略低，但明显优于大多数氧化物以及压电催化剂的光催化产氢，并已使用双层模型进行说明以进一步发展。
