Urchin‐like CoP nanomaterial as an electrocatalyst for efficient hydrogen evolution reaction. (22nd October 2020)

• Record Type: Journal Article
• Authors: Miao, Mengxin; Zhang, Lili; Zheng, Jinyou; Ma, Wei; Li, Huanran; Jiang, Suyu; Yu, Xiaomei; Huang, Yanfang; Gao, Jian; Han, Guihong
• Is Part Of: International journal of energy research. Volume 45:Number 3(2021)
• Page Start: 4735
• Page End: 4745
• Publication Date: 2020-10-22
• Subjects: CoP -- electrocatalysis -- hydrogen evolution reaction -- urchin‐like structure -- water splitting; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Power resources -- Research -- Periodicals; 621.042
• DOI: 10.1002/er.6071
• Languages: English
• ISSNs: 0363-907X

Abstract

Summary: The morphology and structure of the electrocatalysts are important factors affecting their performance for electrochemical splitting water into hydrogen. Herein, the urchin‐like CoP nanomaterials with the large specific surface area (SSA) were fabricated through the solvothermal process and the solid‐gas reaction for hydrogen evolution reaction (HER). The resulting CoP nanomaterial with a diameter of approximately 4 μm was assembled by the nanowires with a length of about 10 nm. The excellent performance is accessible for HER with a small overpotential of 130 mV and a low Tafel slope of 52 mV/decade in a 0.5 M H2 SO4 aqueous solution. Especially, the resulting urchin‐like CoP nanomaterials with a large SSA and electric double‐layer capacitance lower the electrochemical impedance and accelerate the electron transfer, endowing the excellent performance for HER process. Abstract : The fabrication of urchin‐like CoP assembled by the tiny nanowires expanded the specific area and advanced the electrocatalytic efficiency with a remarkable small overpotential of 130 mV and Tafel slope of 52 mV/decade.