当前位置：
X-MOL 学术
›
ACS Catal.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Atomically Alloyed Fe–Co Catalyst Derived from a N-Coordinated Co Single-Atom Structure for CO2 Hydrogenation
ACS Catalysis ( IF 11.3 ) Pub Date : 2021-02-05 , DOI: 10.1021/acscatal.0c04358 Sun-Mi Hwang 1 , Seung Ju Han 2 , Hae-Gu Park 2 , Hojeong Lee 3 , Kwangjin An 3 , Ki-Won Jun 2 , Seok Ki Kim 2
ACS Catalysis ( IF 11.3 ) Pub Date : 2021-02-05 , DOI: 10.1021/acscatal.0c04358 Sun-Mi Hwang 1 , Seung Ju Han 2 , Hae-Gu Park 2 , Hojeong Lee 3 , Kwangjin An 3 , Ki-Won Jun 2 , Seok Ki Kim 2
Affiliation
|
We report a stable and efficient Fe–Co catalyst derived from N-coordinated Co single-atom carbon (FeK/Co–NC) for CO2 conversion to long-chain hydrocarbons with a C5+ selectivity of up to 42.4% at a conversion of 51.7% at 300 °C and 2.5 MPa. Its performance remained stable over a time-on-stream of 100 h. The FeK/Co–NC catalyst exhibited less methane selectivity (21.6%) than the coimpregnated FeCoK/NC catalyst (33.8%), which is attributed to the Co–NC support, efficiently inducing Fe–Co alloy formation by atomically supplying Co into Fe nanoparticles. The Fe–Co alloy of the FeK/Co–NC catalyst remained stable in both carburized and oxide forms during the reaction. Density functional theory suggests that Fe–Co mixed oxides accelerate oxygen removal during the reverse water–gas shift, whereas Fe–Co mixed carbides promote chain growth to suppress methane formation during Fischer–Tropsch synthesis. Our combined experimental and theoretical study demonstrates the promoting effect of the Fe–Co atomic alloy structure for CO2 hydrogenation.
中文翻译：
源自N配位的Co单原子结构的CO 2加氢原子合金Fe–Co催化剂
我们报道了一种稳定高效的Fe-Co催化剂，该催化剂由N配位的Co单原子碳（FeK / Co-NC）衍生，用于将CO 2转化为具有C 5+的长链烃在300°C和2.5 MPa下的转化率为51.7％，选择性高达42.4％。在运行100小时后，其性能保持稳定。与共浸渍的FeCoK / NC催化剂（33.8％）相比，FeK / Co-NC催化剂具有更低的甲烷选择性（21.6％），这归因于Co-NC载体，通过原子地将Co原子供应到Fe中，有效地诱导了Fe-Co合金的形成。纳米粒子。在反应过程中，FeK / Co-NC催化剂的Fe-Co合金在渗碳和氧化物形式下均保持稳定。密度泛函理论表明，Fe-Co混合氧化物在反向水煤气变换过程中会加速除氧，而Fe-Co混合碳化物则促进链增长以抑制费托合成过程中甲烷的形成。2加氢。
更新日期：2021-02-19
中文翻译：
源自N配位的Co单原子结构的CO 2加氢原子合金Fe–Co催化剂
我们报道了一种稳定高效的Fe-Co催化剂，该催化剂由N配位的Co单原子碳（FeK / Co-NC）衍生，用于将CO 2转化为具有C 5+的长链烃在300°C和2.5 MPa下的转化率为51.7％，选择性高达42.4％。在运行100小时后，其性能保持稳定。与共浸渍的FeCoK / NC催化剂（33.8％）相比，FeK / Co-NC催化剂具有更低的甲烷选择性（21.6％），这归因于Co-NC载体，通过原子地将Co原子供应到Fe中，有效地诱导了Fe-Co合金的形成。纳米粒子。在反应过程中，FeK / Co-NC催化剂的Fe-Co合金在渗碳和氧化物形式下均保持稳定。密度泛函理论表明，Fe-Co混合氧化物在反向水煤气变换过程中会加速除氧，而Fe-Co混合碳化物则促进链增长以抑制费托合成过程中甲烷的形成。2加氢。
京公网安备 11010802027423号