Mingyue Dou, Lele Gao, Zhen Yan, Hao Pan, Zhiqiang Li, Guangtong Hai and Xiubing Huang
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引用次数: 0
摘要
在本研究中，通过电催化自重构Ce掺杂Ni-BDC （BDC代表对苯二甲酸连接剂）金属有机框架（mof），获得了泡沫镍负载的Ce掺杂NiOOH纳米片。循环伏安（CV）活化后的NiCe(10%)-MOF（命名为NiCe(10%)-MOF-CV）在出氧反应（OER）和5-羟甲基糠醛氧化反应（HMFOR）中均优于Ni-MOF-CV。在1.5 VRHE条件下，其电流密度（153.15 mA cm-2）优于Ni-MOF-CV （87.7 mA cm-2）。连续循环20次后，在1.44 VRHE条件下，HMF转化率为100%，2,5-呋喃二羧酸（FDCA）收率为98.6%，法拉第效率为99.8%。NiCe(10%)-MOF-CV具有优异的HMFOR性能是由于Ce和Ni之间的强电子相互作用，OH*和HMF的吸附增强，速率决定步骤的能垒降低。最后对HMFOR的机理进行了探讨，希望为今后电催化剂的设计提供指导。
Ce-doped NiOOH generated through the electrocatalytic self-reconstruction of Ce-doped Ni-MOFs for the efficient electrooxidation of 5-hydroxymethylfurfural†
In this study, nickel foam-supported Ce-doped NiOOH nanosheets were obtained via the electrocatalytic self-reconstruction of Ce-doped Ni-BDC (where BDC stands for a terephthalic acid linker) metal–organic frameworks (MOFs). The NiCe(10%)-MOF after cyclic voltammetry (CV) activation (named NiCe(10%)-MOF-CV) showed better performance in the oxygen evolution reaction (OER) and 5-hydroxymethylfurfural oxidation reaction (HMFOR) compared with Ni-MOF-CV. It also exhibited a more satisfactory current density (153.15 mA cm−2) compared with Ni-MOF-CV (87.7 mA cm−2) in the HMFOR at 1.5 VRHE, and after 20 successive cycles, it still exhibited a satisfactory HMF conversion rate (100%), 2,5-furanodicarboxylic acid (FDCA) yield (98.6%) and faradaic efficiency (99.8%) at 1.44 VRHE. The excellent HMFOR performance of NiCe(10%)-MOF-CV was attributed to the strong electron interaction between Ce and Ni, the enhanced adsorption of OH* and HMF, and the reduced energy barrier of the rate-determining step. Finally, the HMFOR mechanism was explored, with an aim to provide guidance for the future designs of electrocatalysts.
期刊介绍：
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.
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