Building dual-phased Ni2P–Ni2P4O12 electrocatalysts for efficient urea oxidation reaction. (1st February 2023)

• Record Type: Journal Article
• Authors: Zhou, Jiajia; Sun, Xiujuan; Tan, Wenjuan; Cao, Qiuhan; Zhao, Yongjie; Ding, Rui; Zhang, Yuwei; Liu, Enhui; Gao, Ping
• Is Part Of: New journal of chemistry. Volume 47:Number 8(2023)
• Page Start: 4009
• Page End: 4017
• Publication Date: 2023-02-01
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj06299b
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : Ni2 P–Ni2 P4 O12 structure with abundant mesopores demonstrates excellent catalytic activity toward alkaline urea electro-oxidation reaction. Abstract : The development of highly efficient electrocatalysts for urea oxidation reaction (UOR) is crucial for reproducible and clean energy technologies. Herein, dual-phased nickel-based cost-effective catalyst nickel phosphide (Ni2 P)-nickel metaphosphate (Ni2 P4 O12 ) microspheric nanoparticles were fabricated through a two-step hydrothermal-phosphorization process by preciously controlling the feeding ratios of the Ni precursor and the P source. It merely needs a potential of 1.35 V vs. RHE to deliver a current density of 10 mA cm −2 with a small Tafel slop of 55 mV dec −1 and maintains high catalytic activity for 10 h in 1.0 M KOH with 0.33 M urea solution. The synergy effect and modulation of the electronic structure between Ni2 P and Ni2 P4 O12 could be the reason for the good UOR performance. This work provides a new perspective for the further design of high-performance electrocatalysts in diverse energy fields.