Heterogeneous structured Ni3Se2/MoO2@Ni12P5 catalyst for durable urea oxidation reaction. (March 2022)

• Record Type: Journal Article
• Authors: Feng, S.; Luo, J.; Li, J.; Yu, Y.; Kang, Z.; Huang, W.; Chen, Q.; Deng, P.; Shen, Y.; Tian, X.
• Is Part Of: Materials today physics. Volume 23(2022)
• Publication Date: 2022-03
• Subjects: Heterogeneous structure -- Urea oxidation reaction -- Integrate electrode -- Ultra-low potential -- Schottky-based vacancies; Materials science -- Periodicals; Physics -- Periodicals; Electronic journals; 530.41
• DOI: 10.1016/j.mtphys.2022.100646
• Languages: English
• ISSNs: 2542-5293

Abstract

Abstract: The urea oxidation reaction (UOR) is an attractive alternative to the oxygen evolution reaction that can be used in hydrogen production. Herein, we propose a new composite catalyst via a two-step method, including the in - situ growth of Ni12 P5 on the nickel foam (NF) substrate, and subsequently, the Ni3 Se2 /MoO2 @Ni12 P5 /NF catalyst is synthesized by the rapid electrodeposition of Ni3 Se2 /MoO2 on the Ni12 P5 . The prepared Ni3 Se2 /MoO2 @Ni12 P5 /NF demonstrates a hierarchical and heterogeneous structure with abundant Schottky vacancies, displaying an ultra-low potential of 1.277 V at 10 mA cm −2 and a Tafel value of 53.8 mV dec −1, which are comparable to those of noble metal-based catalysts. In addition, the performance retention is 97.4% after the durability test for 120 h, demonstrating its remarkable stability for the UOR. The electrochemical results show that Schottky vacancies are beneficial to the adsorption of OH − and release O2 from the electrode surface, leading to the enhanced catalytic performance. Graphical abstract: Ni3 Se2 /MoO2 @Ni12 P5 /NF exhibits high activity and durability for the urea oxidation reaction. Image 1 Highlights: Ni3 Se2 /MoO2 @Ni12 P5 /NF is synthesized by the electrodeposition of Ni3 Se2 /MoO2 on the Ni12 P5 . The sample displays a hierarchical and heterogeneous structure with abundant Schottky vacancies. The catalyst exhibits high activity and durability for the urea oxidation reaction.