Hou Shu-Zhen, Zhang Xiang-Da, Yuan Wei-Wen, Li Yan-Xiang, Gu Zhi-Yuan
Jiangsu Key Laboratory of Biofunctional Materials, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, Jiangsu Key Laboratory of New Power Batteries, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
Inorg Chem. 2020 Aug 17;59(16):11298-11304. doi: 10.1021/acs.inorgchem.0c00769. Epub 2020 Jul 29.
It is urgent to find a catalyst with high selectivity and efficiency for the reduction of CO by renewable electric energy, which is the important means to reduce the greenhouse effect. In this work, we report that the metal-organic framework (MOF) indium-based 1,4-benzenedicarboxylate (In-BDC) catalyzes CO to formate with a Faradaic efficiency (FE) of more than 80% in a wide voltage range between -0.419 and -0.769 V (vs. reversible hydrogen electrode, RHE). In-BDC performs at a maximum FE of 88% at -0.669 V (vs. RHE) and a turnover frequency of up to 4798 h at -1.069 V (vs. RHE). The long-term durability of 21 h and reusability of the electrocatalyst are clearly demonstrated. It opens up a new opportunity to utilize MOF with novel metal motifs for the efficient electroreduction of CO.
迫切需要找到一种具有高选择性和高效率的催化剂，利用可再生电能将CO还原，这是减少温室效应的重要手段。在这项工作中，我们报道了金属有机框架（MOF）铟基对苯二甲酸酯（In-BDC）在-0.419至-0.769 V（相对于可逆氢电极，RHE）的宽电压范围内催化CO生成甲酸盐，法拉第效率（FE）超过80%。In-BDC在-0.669 V（相对于RHE）时的最大FE为88%，在-1.069 V（相对于RHE）时的周转频率高达4798 h⁻¹。清晰地展示了该电催化剂21 h的长期耐久性和可重复使用性。它为利用具有新型金属基序的MOF进行CO的高效电还原开辟了新机会。
