Surface reconstruction enabling MoO2/MoP hybrid for efficient electrocatalytic oxidation of p-xylene to terephthalic acid

被引：15

作者：

Lv, Ye ^{[1
]}

Peng, Mao ^{[1
,2
]}

Yang, Weiwei ^{[1
]}

Liu, Menghui ^{[1
]}

Kong, Aiqun ^{[3
]}

Fu, Yan ^{[1
]}

Li, Wei ^{[1
]}

Zhang, Jinli ^{[1
,3
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300350, Peoples R China

[2] Tianjin Univ, Inst Shaoxing, Tianjin 312300, Zhejiang, Peoples R China

[3] Shihezi Univ, Sch Chem & Chem Engn, State Key Lab Incubat Base Green Proc Chem Engn, Shihezi 832003, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY | 2024年 / 340卷

基金：

中国国家自然科学基金;

关键词：

Electrocatalytic oxidation; p-Xylene; Transition metal phosphide; Surface reconstruction; Terephthalic acid; OXYGENATION;

D O I：

10.1016/j.apcatb.2023.123229

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Selective oxidation of p-xylene (PX) to terephthalic acid (TA) remains exceptionally challenging since it easily undergoes deep oxidation. Herein, a nickel foam-supported molybdenum dioxide/molybdenum phosphide hybrid electrocatalyst (MoO2/MoP/NF) is reported for highly selective generation of TA via electrocatalytic oxidation (ECO) of PX in alkaline medium. The efficient MoO2/MoP/NF anode material displays a unique cluster like nanocone architecture, showing abundant active sites and rapid charge transfer kinetics. Benefit from the synergy between MoO2 and MoP, the MoO2/MoP/NF provides a high TA selectivity of 94.8% and an outstanding faradaic efficiency of 76.9% at the conversion of 71.6%. Additionally, the anodic oxidation of PX over MoO2/ MoP/NF promotes the cathodic hydrogen production. The potential-induced surface reconstruction of the as synthesized MoO2/MoP/NF yields new phases of phosphomolybdate and potassium molybdate. The top P site on the phosphomolybdate surface facilitates the adsorption of reaction intermediates but weakens the adsorption of TA, thereby yielding high selectivity toward TA.

引用

页数：12