Phytate-Coordination Triggered Enrichment of Surface NiOOH Species on Nickel Foam for Efficient Urea Electrooxidation  

作　　者：Jiayuan Li Yuefei Li Qingyu Xue Yuchi Gao Yuanyuan Ma 

机构地区：[1]Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology,School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710072,China

出　　处：《Chinese Journal of Structural Chemistry》2022年第7期35-39,共5页结构化学（英文）

基　　金：the financial support from the National Natural Science Foundation of Shaanxi province,China (2019JQ-486);the Young Talent Support Project of Shaanxi (20200601);the Fundamental Research Funds for the Central Universities (No. D5000210651)。

摘　　要：Nickel(Ni)-based materials are promising electrocatalysts for the urea electrooxidation reaction, as the in situ formed NiOOH species on their surface during operation are catalytically active sites. In this work, phytate-coordinated Ni foam(PA-NF)is shown to deliver a high catalytic performance, with a potential as low as 1.38 V at 10m A/cm2, a Tafel slope as low as 64.1 mV/dec, and superior catalytic stability. Characterizations revealed that such a high performance was ascribed to the kinetic acceleration of surface reconstruction and the enriched NiOOH active species on the PA-NF surface owing to PA-coordination induced upshift of d-band center of Ni sites.Overall, a novel and simple strategy is provided for designing the efficient as well as universal Ni-based catalyst for the electrooxidation of urea, which can also be extended to other transition-metal-based systems.

关 键 词：PHYTATES surface coordination urea electrooxidation reaction electrocatalysis 

分 类 号：O643.36[理学—物理化学]