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Highly Efficient and Selective Visible-Light Driven Photoreduction of CO2 to CO by Metal–Organic Frameworks-Derived Ni?Co?O Porous Microrods
Small ( IF 13.0 ) Pub Date : 2022-09-01 , DOI: 10.1002/smll.202202939 Hongli Yang 1, 2 , Dongdong Zhang 2 , Yong Luo 1, 3 , Wenxiang Yang 2 , Xiaoqiang Zhan 2 , Weiyou Yang 2 , Huilin Hou 2
Small ( IF 13.0 ) Pub Date : 2022-09-01 , DOI: 10.1002/smll.202202939 Hongli Yang 1, 2 , Dongdong Zhang 2 , Yong Luo 1, 3 , Wenxiang Yang 2 , Xiaoqiang Zhan 2 , Weiyou Yang 2 , Huilin Hou 2
Affiliation
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Photocatalytic CO2 reduction by solar energy into carbonaceous feedstock chemicals is recognized as one of the effective ways to mitigate both the energy crisis and greenhouse effect, which fundamentally relies on the development of advanced photocatalysts. Here, the exploration of porous microrod photocatalysts based on novel NiCoO solid solutions derived from bimetallic metal–organic frameworks (MOFs) is reported. They exhibit overall enhanced photocatalytic performance with both high activity and remarkable selectivity for reducing CO2 into CO under visible-light irradiation, which are superior to most related photocatalysts reported. Accordingly, the Ni0.2-Co0.8-O microrod (MR-N0.2C0.8O) photocatalyst delivers high efficiency for photocatalytic CO2 reduction into CO at a rate up to ≈277 µmol g–1 h–1, which is ≈35 times to that of its NiO counterpart. Furthermore, they display a high selectivity of ≈85.12%, which is not only better than that of synthesized Co3O4 (61.25%) but also superior to that of reported Co3O4-based photocatalysts. It is confirmed that the Co and Ni species are responsible for CO2CO conversion activity and selectivity, respectively. In addition, it is verified, by adjusting the Ni contents, that the band structure of NiCoO microrods can be tailored with favorable reduction band potentials, which thus enhance the selectivity toward CO2 photoreduction.
中文翻译：
金属-有机骨架衍生的 Ni?Co?O 多孔微棒高效选择性的可见光驱动 CO2 光还原为 CO
太阳能光催化CO 2还原为含碳原料化学品被认为是缓解能源危机和温室效应的有效途径之一，这从根本上依赖于先进光催化剂的发展。在这里，报道了基于双金属金属-有机框架（MOF）衍生的新型NiCoO固溶体的多孔微棒光催化剂的探索。它们表现出整体增强的光催化性能，在可见光照射下具有高活性和显着的选择性将 CO 2还原为 CO，优于已报道的大多数相关光催化剂。因此，Ni 0.2 -Co 0.8-O 微棒 (MR-N 0.2 C 0.8 O) 光催化剂以高达 ≈277 µmol g –1 h –1的速率将光催化 CO 2还原为 CO 的效率很高，是 NiO 对应物的 ≈35 倍。此外，它们显示出≈85.12%的高选择性，不仅优于合成的Co 3 O 4 (61.25%)，而且优于已报道的Co 3 O 4基光催化剂。已确认 Co 和 Ni 物种是造成 CO 2 分别为 CO 转化活性和选择性。此外，通过调整Ni含量，验证了NiCoO微棒的能带结构可以调整为具有有利的还原带电位，从而提高了对CO 2光还原的选择性。
更新日期：2022-09-01
中文翻译：
金属-有机骨架衍生的 Ni?Co?O 多孔微棒高效选择性的可见光驱动 CO2 光还原为 CO
太阳能光催化CO 2还原为含碳原料化学品被认为是缓解能源危机和温室效应的有效途径之一，这从根本上依赖于先进光催化剂的发展。在这里，报道了基于双金属金属-有机框架（MOF）衍生的新型NiCoO固溶体的多孔微棒光催化剂的探索。它们表现出整体增强的光催化性能，在可见光照射下具有高活性和显着的选择性将 CO 2还原为 CO，优于已报道的大多数相关光催化剂。因此，Ni 0.2 -Co 0.8-O 微棒 (MR-N 0.2 C 0.8 O) 光催化剂以高达 ≈277 µmol g –1 h –1的速率将光催化 CO 2还原为 CO 的效率很高，是 NiO 对应物的 ≈35 倍。此外，它们显示出≈85.12%的高选择性，不仅优于合成的Co 3 O 4 (61.25%)，而且优于已报道的Co 3 O 4基光催化剂。已确认 Co 和 Ni 物种是造成 CO 2 分别为 CO 转化活性和选择性。此外，通过调整Ni含量，验证了NiCoO微棒的能带结构可以调整为具有有利的还原带电位，从而提高了对CO 2光还原的选择性。
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