The Role of Surface Termination in Halide Perovskites for Efficient Photocatalytic Synthesis

Yuanyuan Dong; Kailin Li; Wenjia Luo; Cheng Zhu; Haoliang Guan; Hao Wang; Lanning Wang; Kailin Deng; Huanping Zhou; Haipeng Xie; Yang Bai; Yujing Li; Qi Chen

doi:10.1002/anie.202002939

The Role of Surface Termination in Halide Perovskites for Efficient Photocatalytic Synthesis

Angew Chem Int Ed Engl. 2020 Jul 27;59(31):12931-12937. doi: 10.1002/anie.202002939. Epub 2020 May 26.

Authors

Yuanyuan Dong¹, Kailin Li¹, Wenjia Luo², Cheng Zhu¹, Haoliang Guan¹, Hao Wang¹, Lanning Wang¹, Kailin Deng³, Huanping Zhou⁴, Haipeng Xie⁵, Yang Bai¹, Yujing Li¹, Qi Chen¹

Affiliations

¹ Experimental Center of Advanced Materials, Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
² School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, P. R. China.
³ Key Laboratory of Agro-products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs/Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China.
⁴ Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China.
⁵ School of Physics and Electronics, Central South University, Changsha, Hunan, 410083, P. R. China.

PMID: 32367688
DOI: 10.1002/anie.202002939

Abstract

Halide perovskites have received attention in the field of photocatalysis owing to their excellent optoelectronic properties. However, the semiconductor properties of halide perovskite surfaces and the influence on photocatalytic performance have not been systematically clarified. Now, the conversion of triose (such as 1,3-dihydroxyacetone (DHA)) is employed as a model reaction to explore the surface termination of MAPbI₃ . By rational design of the surface termination for MAPbI₃ , the production rate of butyl lactate is substantially improved to 7719 μg g^-1 cat. h^-1 under visible-light illumination. The MAI-terminated MAPbI₃ surface governs the photocatalytic performance. Specially, MAI-terminated surface is susceptible to iodide oxidation, which thus promotes the exposure of Pb^II as active sites for this photocatalysis process. Moreover, MAI-termination induces a p-doping effect near the surface for MAPbI₃ , which facilitates carrier transport and thus photosynthesis.

Keywords: halide perovskite; iodide vacancies; photocatalysis; surface termination; triose.

Abstract

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