用于高效析氧反应的锌掺杂硫化钴纳米阵列：理解对预催化剂的掺杂效应

Zn-Doped CoS Nanoarrays for an Efficient Oxygen Evolution Reaction: Understanding the Doping Effect for a Precatalyst.

作者信息

Wu Jie, Zhang Yuanyuan, Zhang Bin, Li Siwei, Xu Ping

机构信息

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, People's Republic of China.

Institute of Industrial Catalysis, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.

出版信息

ACS Appl Mater Interfaces. 2022 Mar 30;14(12):14235-14242. doi: 10.1021/acsami.2c00455. Epub 2022 Mar 18.

DOI:10.1021/acsami.2c00455

PMID:35302344

Abstract

Development of low-cost, efficient, and durable electrocatalysts for the oxygen evolution reaction (OER) is crucial for multiple energy conversions and storage devices. Herein, Zn-doped CoS nanoarrays supported on carbon cloth, Co(Zn)S/CC, are fabricated through a facile sulfidization of CoZn metal-organic frameworks. This precatalyst, Co(Zn)S/CC, with a well-defined nanoarray structure affords excellent OER catalytic activity (η = 248 mV at 10 mA/cm) and long-term durability in 1 M KOH. X-ray photoelectron and Raman spectroscopic studies indicate that Co(Zn)S undergoes surface reconstruction with the generation of Co(Zn)OOH adsorbed with SO at the surface during the OER process. The Zn dopant is calculated to impact on the electronic structure of Co species and further the adsorption of intermediates. This work not only provides a novel method for the synthesis of bimetallic sulfides but also gives insights into the doping effect on the OER performance of transition metal sulfides.

摘要

开发用于析氧反应（OER）的低成本、高效且耐用的电催化剂对于多种能量转换和存储设备至关重要。在此，通过对CoZn金属有机框架进行简便的硫化处理，制备了负载在碳布上的Zn掺杂CoS纳米阵列，即Co(Zn)S/CC。这种具有明确纳米阵列结构的预催化剂Co(Zn)S/CC在1 M KOH中具有出色的OER催化活性（在10 mA/cm²时η = 248 mV）和长期耐久性。X射线光电子能谱和拉曼光谱研究表明，在OER过程中，Co(Zn)S会发生表面重构，表面生成吸附有SO的Co(Zn)OOH。据计算，Zn掺杂剂会影响Co物种的电子结构，进而影响中间体的吸附。这项工作不仅提供了一种合成双金属硫化物的新方法，还深入了解了掺杂对过渡金属硫化物OER性能的影响。