乙醇酸
催化作用
乙二醇
选择性
化学
电解
聚对苯二甲酸乙二醇酯
电流密度
材料科学
无机化学
化学工程
电极
有机化学
物理化学
电解质
乳酸
复合材料
工程类
物理
生物
细菌
量子力学
遗传学
作者
Fulai Liu,Xutao Gao,Rui Shi,Zhengxiao Guo,Edmund C. M. Tse,Yong Chen
标识
DOI:10.1002/anie.202300094
摘要
Electro-reforming of Polyethylene-terephthalate-derived (PET-derived) ethylene glycol (EG) into fine chemicals and H2 is an ideal solution to address severe plastic pollution. Here, we report the electrooxidation of EG to glycolic acid (GA) with a high Faraday efficiency and selectivity (>85 %) even at an industry-level current density (600 mA cm-2 at 1.15 V vs. RHE) over a Pd-Ni(OH)2 catalyst. Notably, stable electrolysis over 200 h can be achieved, outperforming all available Pd-based catalysts. Combined experimental and theoretical results reveal that 1) the OH* generation promoted by Ni(OH)2 plays a critical role in facilitating EG-to-GA oxidation and removing poisonous carbonyl species, thereby achieving high activity and stability; 2) Pd with a downshifted d-band center and the oxophilic Ni can synergistically facilitate the rapid desorption and transfer of GA from the active Pd sites to the inactive Ni sites, avoiding over-oxidation and thus achieving high selectivity.
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