用于将氧气高效电还原为过氧化氢的超薄单晶铂硒纳米片。

Ultrathin single-crystal PtSe nanosheets for high-efficiency O electroreduction to HO.

作者信息

Dong Kai, Xu Zhaoquan, He Xun, Zhao Donglin, Chen Haijun, Liang Jie, Luo Yongsong, Sun Shengjun, Zheng Dongdong, Liu Qian, Alshehri Abdulmohsen Ali, Feng Zhesheng, Wang Yan, Sun Xuping

机构信息

College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, Shandong, China.

Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.

出版信息

Chem Commun (Camb). 2022 Sep 22;58(76):10683-10686. doi: 10.1039/d2cc04503f.

DOI:10.1039/d2cc04503f

PMID:36065831

Abstract

Electrochemical synthesis of HO a two-electron oxygen reduction reaction (2e ORR) has emerged as a promising alternative to the anthraquinone process. However, the strong competition from the 4e pathway severely limits its activity and selectivity, especially for Pt-based catalysts. Herein, ultrathin single-crystal PtSe nanosheets were successfully prepared an selenization process using commercial Pt/C as a precursor, demonstrating an exclusive 2e ORR pathway compared to the 4e pathway of commercial Pt/C, delivering a high HO selectivity over a wide pH range (>80%, up to 94.1%). Furthermore, infrared spectroscopy results revealed Pt as an active center, accompanied by the key intermediate OOH* adsorption and HOOH formation.

摘要

通过两电子氧还原反应（2e ORR）电化学合成过氧化氢已成为蒽醌法颇具前景的替代方法。然而，来自4e途径的激烈竞争严重限制了其活性和选择性，尤其是对于铂基催化剂而言。在此，以商业Pt/C为前驱体，通过硒化过程成功制备了超薄单晶PtSe纳米片，与商业Pt/C的4e途径相比，其展示出独特的2e ORR途径，在较宽的pH范围内具有较高的过氧化氢选择性（>80%，高达94.1%）。此外，红外光谱结果表明Pt是活性中心，伴随着关键中间体OOH*的吸附和过氧化氢的形成。