Surface engineering improving selective hydrogenation of p-chloronitrobenzene over AuPt alloy/SnNb2O6 ultrathin nanosheets under visible light

被引：0

作者：

Wang Z. ^{[1
]}

Wang H. ^{[1
]}

Shi Y. ^{[1
]}

Liu C. ^{[1
]}

Wu L. ^{[1
]}

Liang S. ^{[2
]}

机构：

[1] State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fujian, Fuzhou

[2] National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou

来源：

Chemical Engineering Science | 2022年 / 262卷

基金：

中国国家自然科学基金;

关键词：

AuPt alloy; Halonitrobenzenes; Lewis Base sites; Photocatalytic hydrogenation; SnNb[!sub]2[!/sub]O[!sub]6[!/sub] nanosheets;

D O I：

10.1016/j.ces.2022.117936

中图分类号：

学科分类号：

摘要：

AuPt alloy/SnNb2O6 ultrathin nanosheet (AuPt/SN) as a photocatalyst is constructed for selective hydrogenation of p-chloronitrobenzene (p-CNB) under visible light irradiation. A typical catalyst (Au0.5Pt0.5/SN) exhibits a high conversion of halonitrobenzenes (99.8%) and selectivity of haloaniline (99.1%). The results of in situ ATR-IR, XPS and Raman indicate a preferential chemoselective adsorption of –NO2 that Lewis base sites (Sn2+) on the catalyst could selectively coordinate with –NO2 whereas C-Cl bond is not be bonded, improving the catalytic selectivity. Atom Pt in alloy is responsible for the formation of ·H, while Au inhabits the dissociation of C-Cl via repressing the generation of Pt-H. The photogenerated electrons can accelerate the ·H formation. ·H could be transferred to Sn2+ sites for the hydrogenation of –NO2 by hydrogen spillover. Therefore, the high performance of the catalyst can be attributed to a surface synergetic effect among Lewis base sites (Sn2+), AuPt alloy and photogenerated electrons. © 2022 Elsevier Ltd

引用

共 57 条

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