Development of Zinc Hydroxide as an Abundant and Universal Cocatalyst for the Selective Photocatalytic Conversion of CO2 by H2O

被引：2

作者：

Xu, Xuanwen ^{[1
]}

Teramura, Kentaro ^{[1
,2
]}

Asakura, Hiroyuki ^{[1
,2
]}

Hosokawa, Saburo ^{[1
,2
]}

Tanaka, Tsunehiro ^{[1
,2
]}

机构：

[1] Kyoto Univ, Dept Mol Engn, Grad Sch Engn, Nishikyo Ku, Kyoto 6158510, Japan

[2] Kyoto Univ, Elements Strategy Initiat Catalysts & Batteries E, Nishikyo Ku, Kyoto 6158245, Japan

来源：

CHEMCATCHEM | 2021年 / 13卷 / 20期

关键词：

Zn(OH)(2); CO2; photoreduction; H2O; selectivity; universality; CARBON-DIOXIDE; REDUCTION; WATER;

D O I：

10.1002/cctc.202100633

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：

Water splitting is always a strongly competitive reaction against the photocatalytic conversion of CO2 using H2O as the electron donor over powder photocatalysts. At present, only Ag nanoparticles function as a universal cocatalyst for the activity and selectivity of CO2 conversion in this regard. Herein, abundant Zn(OH)(2) is investigated over various typical powder photocatalysts and shows attractive universality in the enhancement of activity and selectivity toward CO evolution from CO2. Taking ZnTa2O6 as an example, the rate of formation of H-2 was suppressed (from 32.8 to 5.8 mu mol h(-1)), while the formation of CO was dramatically promoted (from 18.4 to 81.4 mu mol h(-1)) with Zn(OH)(2) as the cocatalyst. Zn ions dissolved in solution and an alkaline electrical double layer of the photocatalysts are proved to be important for the function of Zn(OH)(2).

引用

页码：4313 / 4317

页数：5

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