期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 10, 页码 5266-5276出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00172g
关键词
-
资金
- National Natural Science Foundation of China [21603191, 21775138]
- Zhejiang Provincial Natural Science Foundation of China [LQ16B010001]
- Public Welfare Technology Application Research Plan Project of Zhejiang Province [2017C37024]
Photocatalytic reduction of CO2 to renewable fuels offers opportunities for long-term energy storage and environmental protection. However, the lack of highly active and selective catalysts impedes the application of this reaction. Here, Janus Pd-Au heterojunctions are proposed as advanced co-catalysts for the conversion of CO2 to CH4, which achieve an unprecedented average CH4 production rate of 48.2 mol g(cat)(-1) h(-1) with a high selectivity of 91.4%. The experimental results indicate that the interfaces between Pd and Au play multiple roles in the enhancement of CO2-to-CH4 conversion: (1) Au atoms around the interface provide the sites for the reduction of CO2 to *CO intermediates and then to CH4; (2) *H intermediates are produced on adjacent Pd atoms on the other side of the interface, which further accelerate the rate-limiting process in conversion of *CO to CH4; (3) charge re-distribution through the Pd-Au interface leads to substantial suppression of H-2 and CO evolution on electron-deficient Pd and electron-rich Au, respectively. This work provides fresh insights into the rational interface design of high-performance bimetallic co-catalysts for selective CO2 photoreduction.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据