钴微过氧化物酶-11 催化有氧条件下中性水中的氢气生成。
Hydrogen evolution from neutral water under aerobic conditions catalyzed by cobalt microperoxidase-11.
机构信息
Department of Chemistry, University of Rochester , Rochester New York 14627-0216, United States.
出版信息
J Am Chem Soc. 2014 Jan 8;136(1):4-7. doi: 10.1021/ja406818h. Epub 2013 Dec 23.
A molecular electrocatalyst is reported that reduces protons to hydrogen (H2) in neutral water under aerobic conditions. The biomolecular catalyst is made from cobalt substitution of microperoxidase-11, a water-soluble heme-undecapeptide derived from the protein horse cytochrome c. In aqueous solution at pH 7.0, the catalyst operates with near quantitative Faradaic efficiency, a turnover frequency ~6.7 s(-1) measured over 10 min at an overpotential of 852 mV, and a turnover number of 2.5 × 10(4). Catalyst activity has low sensitivity to oxygen. The results show promise as a hydrogenase functional mimic derived from a biomolecule.
一种分子电催化剂被报道能够在有氧条件下将质子还原为中性水中的氢气（H2）。该生物分子催化剂由微过氧化物酶-11 的钴取代制成，微过氧化物酶-11 是一种水溶性血红素十一肽，来源于蛋白质马细胞色素 c。在 pH 值为 7.0 的水溶液中，该催化剂的法拉第效率接近定量，在 852 mV 的过电势下测量 10 分钟的周转频率约为 6.7 s(-1)，周转数为 2.5 × 10(4)。催化剂活性对氧气的敏感性较低。研究结果表明，该催化剂有望成为一种源自生物分子的氢化酶功能模拟物。
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