Selective C2+ Alcohol Synthesis from Direct CO2 Hydrogenation over a Cs-Promoted Cu-Fe-Zn Catalyst
Selective C2+ Alcohol Synthesis from Direct CO2 Hydrogenation over a Cs-Promoted Cu-Fe-Zn Catalyst
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Cs 促进的 Cu-Fe-Zn 催化剂上直接 CO2 加氢选择性 C-2( ) 醇
DOI：
10.1021/acscatal.0c01184
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发表时间：
2020-05-01
期刊：
影响因子：
12.9
通讯作者：
Tsang，Shik Chi Edman
中科院分区：
文献类型：
--
作者：
Xu，Di;Ding，Mingyue;Tsang，Shik Chi Edman
Higher alcohol (C2+) synthesis (HAS) from direct CO2hydrogenation is a promising way to realize the fixation of CO2to high-value chemicals; however, the identification of active catalysts to give satisfactory activity and selectivity is not yet achieved, let alone the elucidation of mechanism. Here, we report a working catalyst containing Cu-Fe-Zn that can efficiently and selectively synthesize C2+alcohols from CO2hydrogenation. The optimized catalyst-encoded Cs-C0.8F1.0Z1.0exhibits a high C2+OH/ROH fraction (weight percent of C2+alcohols in total C1and C2+alcohols) of 93.8% with a high C2+OH space time yield (STY) of 73.4 mg gcat–1h–1(1.47 mmol gcat–1h–1). A mechanism study reveals that HAS experiences a tandem pathway of combining surface CO* formation on Cu-ZnO dual sites with surface hydrocarbon moieties on Cu-Fe7C3dual sites at their material interfaces. A good balance of dissociative and nondissociative C–O bond activation in synergy results in the high HAS activity of Cs-C0.8F1.0Z1.0.
