Structure-designed synthesis of hollow/porous cobalt sulfide/phosphide based materials for optimizing supercapacitor storage properties and hydrogen evolution reaction

Chao Wang; Guozhe Sui; Dongxuan Guo; Jinlong Li; Li Zhang; Shaobin Li; Jianjiao Xin; Dong-Feng Chai; Wenxin Guo

doi:10.1016/j.jcis.2021.04.118

Structure-designed synthesis of hollow/porous cobalt sulfide/phosphide based materials for optimizing supercapacitor storage properties and hydrogen evolution reaction

J Colloid Interface Sci. 2021 Oct:599:577-585. doi: 10.1016/j.jcis.2021.04.118. Epub 2021 Apr 26.

Authors

Chao Wang¹, Guozhe Sui², Dongxuan Guo³, Jinlong Li⁴, Li Zhang⁵, Shaobin Li⁵, Jianjiao Xin¹, Dong-Feng Chai⁶, Wenxin Guo¹

Affiliations

¹ College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China.
² College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China; Key Laboratory of Fine Chemicals of College of Heilongjiang Province, Qiqihar University, Qiqihar 161006, China.
³ College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China; Key Laboratory of Fine Chemicals of College of Heilongjiang Province, Qiqihar University, Qiqihar 161006, China. Electronic address: dongxuanguo92@gmail.com.
⁴ College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China; Key Laboratory of Fine Chemicals of College of Heilongjiang Province, Qiqihar University, Qiqihar 161006, China. Electronic address: jinlong141@163.com.
⁵ College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, China.
⁶ College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China; Key Laboratory of Fine Chemicals of College of Heilongjiang Province, Qiqihar University, Qiqihar 161006, China. Electronic address: chaidf_chem@163.com.

PMID: 33971566
DOI: 10.1016/j.jcis.2021.04.118

Abstract

Cobalt-based transition metal phosphides/sulfides have been viewed as promising candidates for supercapacitor (SCs) and hydrogen evolution reaction (HER) featured with their intrinsic merits. Nevertheless, the sluggish reaction kinetics and drastic volume expansion upon electrochemical process hinder their commercial application. In this work, the hollow/porous cobalt sulfide/phosphide based nanocuboids (C-CoP₄ and CoS₂ HNs) with superior specific surface area are achieved by employing a novel chemical etching-phosphatization/sulfuration strategy. The hollow/porous structure could offer rich active sites and shorten electrons/ions diffusion length. In virtue of their structural advantage, the obtained C-CoP₄ and CoS₂ HNs perform superior specific capacitance, fast charge/discharge rate and beneficial cycling stability. The advanced asymmetrical supercapacitors assembled by C-CoP₄ and CoS₂ HNs deliver exceptional energy density, respectively. Furthermore, when employed as hydrogen evolution reaction electrocatalysts, C-CoP₄ and CoS₂ HNs yield favorable electrocatalytic activity. These findings shed fundamental insight on the design of dual-functional transition metal phosphide/sulfide based materials for optimizing hydrogen evolution reaction and supercapacitor storage properties.

Keywords: Chemical etching; Cobalt phosphide/sulfide; Dual-functional; Hollow/porous.