Pyroelectric effect in CdS nanorods decorated with a molecular Co-catalyst for hydrogen evolution

By Meiyu Zhang, Qiyu Hu, Kangwei Ma, Yong Ding, Can Li. 2020

150 citations recorded by the source corpus.

Abstract Hexagonal cadmium sulfide (CdS) with a noncentro-symmetric structure exhibits piezoelectric and pyroelectric effect due to spontaneous polarization changes companied by temperature variation. However, its pyroelectric effect in pyroelectro-catalytic hydrogen evolution has not been well identified. Herein, we found that CdS nanorods decorated with an organic molecule 2-mercaptobenzimidazole (2MBI) can greatly enhance the pyroelectro-catalytic hydrogen evolution activity. The 2MBI acted as a molecular co-catalyst improves the pyroelectric property of CdS and enhances the separation of pyroelectro-induced charges. Under thermal cycling between 25 °C and 55 °C, CdS-2MBI shows apparently improved pyroelectro-catalytic H2 evolution activity, which is about 5 folds of that for CdS alone. This work may initiate a new prospect for pyroelectric effect in photocatalysis, such as the photocatalytic hydrogen evolution under natural temperature fluctuations.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/7c94ee7621aac78c88cf7e5243d11ae5af1f6b0d