塔菲尔方程
法拉第效率
异质结
材料科学
电解质
电催化剂
化学工程
分解水
吸附
电解
电化学
化学
催化作用
电极
光电子学
光催化
物理化学
有机化学
工程类
作者
Wanqi Jia,Bowen Liu,Rui Gong,Xinxin Bian,Shichao Du,Song Ma,Zichen Song,Zhiyu Ren,Zhimin Chen
出处
期刊:Small
[Wiley]
日期:2023-05-25
卷期号:19 (39)
被引量:11
标识
DOI:10.1002/smll.202302025
摘要
The renewable electricity-driven hydrogen evolution reaction (HER) coupled with biomass oxidation is a powerful avenue to maximize the energy efficiency and economic feedback, but challenging. Herein, porous Ni-VN heterojunction nanosheets on nickel foam (Ni-VN/NF) are constructed as a robust electrocatalyst to simultaneously catalyze HER and 5-hydroxymethylfurfural electrooxidation reaction (HMF EOR). Benefiting from the surface reconstruction of Ni-VN heterojunction during the oxidation process, the derived NiOOH-VN/NF energetically catalyzes HMF into 2,5-furandicarboxylic acid (FDCA), yielding the high HMF conversion (>99%), FDCA yield (99%), and Faradaic efficiency (>98%) at the lower oxidation potential along with the superior cycling stability. Ni-VN/NF is also surperactive for HER, exhibiting an onset potential of ≈0 mV and Tafel slope of 45 mV dec-1 . The integrated Ni-VN/NF||Ni-VN/NF configuration delivers a compelling cell voltage of 1.426 V at 10 mA cm-2 for the H2 O-HMF paired electrolysis, about 100 mV lower than that for water splitting. Theoretically, for Ni-VN/NF, the superiority in HMF EOR and HER is mainly dominated by the local electronic distribution at the heterogenous interface, which accelerates the charge transfer and optimize the adsorption of reactants/intermediates by modulating the d-band center, therefore being an advisable thermodynamic and kinetic process.
科研通智能强力驱动
Strongly Powered by AbleSci AI