Highly Efficient and Selective Photocatalytic CO2 Reduction to CO in Water by a Cobalt Porphyrin Molecular Catalyst
Highly Efficient and Selective Photocatalytic CO2 Reduction to CO in Water by a Cobalt Porphyrin Molecular Catalyst
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DOI：
10.1021/acscatal.8b04975
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发表时间：
2019-06-01
期刊：
影响因子：
12.9
通讯作者：
Sakai, Ken
中科院分区：
文献类型：
--
作者：
Call, Arnau;Cibian, Mihaela;Sakai, Ken
以[Ru（bpy）（3）]（2+）为光敏剂，抗坏血酸盐为牺牲电子给体，研究了水溶性钴卟啉（[{meso-四（4-磺酸基苯基）卟啉合}钴（III）]，CoTPPS）在可见光照射下对CO2光还原反应的催化性能. CO的选择性生产（>82%），效率高（926 TONCO; TONCO = CO的周转数）。在优化时，实现至少91%的选择性。在低催化剂负载量下达到高达4000 TONCO和2400 h（-1）TOFCO（TOFCO = CO的周转频率）的有效性，尽管选择性有所损失。这项工作成功地证明了CoTPPS在水中进行高效光还原CO2的能力，同时保持其对CO形成的高选择性。
The performance of a water-soluble cobalt porphyrin ([{meso-tetra(4-sulfonatophenyl)porphyrinato}cobalt(III)], CoTPPS) as a catalyst for the photoreduction of CO2 in fully aqueous media has been investigated under visible light irradiation using [Ru(bpy)(3)](2+) as a photosensitizer and ascorbate as a sacrificial electron donor. CO is selectively produced (>82%) with high efficiency (926 TONCO; TONCO = turnover number for CO). Upon optimization, selectivities of at least 91% are achieved. Efficiencies up to 4000 TONCO and 2400 h(-1) TOFCO (TOFCO = turnover frequency for CO) are reached at low catalyst loadings, albeit with loss in selectivity. This work successfully demonstrates the ability of CoTPPS to perform highly efficient photoreduction of CO2 in water while retaining its high selectivity for CO formation.