Xinru Yu, Yue Zhao, Kaiyue Yan, Yiming Zhao, Min Ma, Ziqi Tian, Ruixiang Ge
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引用次数: 0
Abstract
Cu-based catalysts are regarded as promising materials for the electro-oxidation of biomass. However, developing effective strategies to improve the intrinsic activity of Cu-based catalysts is still challenging and rarely reported. Herein, we synthesized a nickel-doped copper oxide catalyst (Ni-CuOx) for 5-hydroxymethylfurfural (HMF) electro-oxidation to 2,5-furandicarboxylic acid (FDCA). The Ni-CuOx exhibited a large current density of 199.7 mA cm-2 at 1.4 V, which is 2.8-fold higher than that of pure CuOx, and exceeds most of the reported Cu-based catalysts. Moreover, the Ni-CuOx also showed high FDCA yield (90.1%) and Faradaic efficiency (98.5%). Physical characterizations and electrochemical analyses demonstrated that Ni doping optimizes the electronic structure of Cu sites, and promoting the adsorption of HMF, contributing to enhanced electrocatalytic activity. This work provides insights into the rational design of copper-based catalysts for biomass electro-oxidation.
铜基催化剂被认为是生物质电氧化的一种很有前途的材料。然而，开发有效的策略来提高铜基催化剂的内在活性仍然具有挑战性，并且很少报道。本文合成了一种镍掺杂氧化铜催化剂（Ni-CuOx），用于5-羟甲基糠醛（HMF）电氧化制2,5-呋喃二羧酸（FDCA）。Ni-CuOx在1.4 V下的电流密度为199.7 mA cm-2，是纯CuOx的2.8倍，超过了目前报道的大多数cu基催化剂。此外，Ni-CuOx还具有较高的FDCA产率（90.1%）和法拉第效率（98.5%）。物理表征和电化学分析表明，Ni掺杂优化了Cu位点的电子结构，促进了HMF的吸附，有助于提高电催化活性。这项工作为生物质电氧化铜基催化剂的合理设计提供了见解。
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