In situ growth of Ni/Fe hydroxide nanosheets using a self-sacrificial template as an efficient and robust electrocatalyst for the oxygen evolution reaction. (20th January 2023)

• Record Type: Journal Article
• Authors: Chang, Cuiping; Xiong, Ying; Miao, Rui; Sun, Yanzhi; Chen, Yongmei; Pan, Junqing
• Is Part Of: New journal of chemistry. Volume 47:Number 6(2023)
• Page Start: 3178
• Page End: 3184
• Publication Date: 2023-01-20
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj04801a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Stainless steel fiber felt was modified to prepare an OER catalyst with high electrocatalytic activity via a simple oxidation method. Abstract : To solve the problem of excessive energy consumption in the process of catalytic water splitting, it is quite essential to exploit high-activity and low-cost electro-catalysts. The present paper proposes a highly catalytically active Ni/Fe hydroxide electro-catalyst for the oxygen evolution reaction (OER), which is in situ formed on the surface of the stainless steel fiber felt using a sacrificial template by adding the oxidizing agent K2 S2 O8 to the alkaline solution under mild conditions. The electrode prepared using this simple one-step chemical oxidation method obviously shows enhanced catalytic activity for the OER. The overpotentials at 10 mA cm −2 are only 214 mV and 263 mV in KOH and Na2 CO3 /NaHCO3 solutions, respectively. In addition, the potential and morphology of the electrode remain stable for 180 h at 10 and 100 mA cm −2 in the Na2 CO3 /NaHCO3 system, demonstrating its ultra-high stability. This new route to prepare OER electrode materials has a promising bright application prospect for large-scale production.