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Facet-engineered CeO2 with Cu single atoms drives photocatalytic selective oxidation of 5-hydroxymethylfurfural
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2024-11-04 , DOI: 10.1039/d4qi02230k
Yifei Li, Senyao Meng, Ping Wang, Miao He, Jiasai Yao, Cheng Yang, Fangzhou Mo, Jiang Li, Zhenxing Li

The crystal facet of CeO2 is crucial in governing the catalytic performance of CeO2. However, studies on the relationship between the photocatalytic oxidation performance of CeO2 and its crystal facets are scarce. Herein, we synthesized a series of CeO2. Through loading Cu single atoms (Cu/CeO2), the facet effects of crystal facets on photocatalytic selective oxidation were systematically studied by employing the selective oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran as a model. Because the (110) facet's superior electron transfer efficiency is feasible for absorbing 5-hydroxymethylfurfural, eliminating α-H, and desorbing 2,5-diformylfuran, the selectivity of Cu/CeO2-nanorods (Cu/CeO2-R) with the (110) facet (93.34%) is much higher than that of Cu/CeO2-nanocubes (Cu/CeO2-C) with the (100) facet (32.22%) and Cu/CeO2-nanooctahedra (Cu/CeO2-O) with the (111) facet (15.20%). DFT calculation shows that Cu 3d exhibits orbital hybridization with Ce 5d and 4f, which provides a favorable pathway for electron transfer. This work delves into the facet-performance relationship during the photocatalytic process.

中文翻译:


具有 Cu 单原子的刻面工程 CeO2 驱动 5-羟甲基糠醛的光催化选择性氧化



CeO2 的晶体面对于控制 CeO2 的催化性能至关重要。然而,关于 CeO2 的光催化氧化性能与其晶体刻面之间关系的研究很少。在此,我们合成了一系列 CeO2。以 5-羟甲基糠醛选择性氧化为 2,5-二甲酰基呋喃为模型,通过加载 Cu 单原子 (Cu/CeO2),系统研究了晶体刻面对光催化选择性氧化的刻面效应。由于 (110) 刻面卓越的电子转移效率对于吸收 5-羟甲基糠醛、消除 α-H 和解吸 2,5-二甲酰呋喃是可行的,因此具有 (110) 刻面的 Cu/CeO2-纳米棒 (Cu/CeO2-R) 的选择性 (93.34%) 远高于具有 (100) 刻面 (32.22%) 和 Cu/CeO2-纳米八面体 (Cu/CeO2-O) 与 (111) 分面 (15.20%)。DFT 计算表明,Cu 3d 表现出与 Ce 5d 和 4f 的轨道杂化,这为电子转移提供了有利的途径。这项工作深入研究了光催化过程中的刻面-性能关系。
更新日期:2024-11-04
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