Xiang Ming, Xu Zhihua, Wang Jinghao, Yang Xiaoqiu, Yan Zhaoxiong
Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan, 430056, P. R. China.
CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology, Beijing, 100190, P. R. China.
Chemistry. 2021 May 12;27(27):7502-7506. doi: 10.1002/chem.202100249. Epub 2021 Apr 14.
Coupling the H evolution reaction in water with thermodynamically favorable organic oxidation reactions is highly desirable, because it can enhance the energy conversion efficiency compared with electrocatalytic water splitting, and produce value-added chemicals instead of O in the anodic reaction. Herein, Co O nanoribbon arrays in situ grown on nickel foam (Co O @NF) was employed as an effective electrocatalyst for the selective oxidation of tetrahydroisoquinolines (THIQs). Various value-added semi-dehydrogenation products including dihydroisoquinolines with electro-deficient or -rich groups could be obtained with moderate yields and faradaic efficiencies. Benefitting from the rich surface active sites of Co O @NF, a two-electrode (Co O @NF||Pt) electrolytic system drove a benchmark current density of 10 mA cm at a cell voltage as low as 1.446 V in 1.0 M KOH aqueous solution containing 0.02 M THIQ, which was reduced by 174 mV in comparison with that of overall water splitting.
将水中的氢析出反应与热力学有利的有机氧化反应耦合是非常可取的，因为与电催化水分解相比，它可以提高能量转换效率，并且在阳极反应中产生增值化学品而不是氧气。在此，原位生长在泡沫镍上的CoO纳米带阵列（CoO@NF）被用作四氢异喹啉（THIQs）选择性氧化的有效电催化剂。可以以适度的产率和法拉第效率获得各种增值半脱氢产物，包括带有缺电子或富电子基团的二氢异喹啉。受益于CoO@NF丰富的表面活性位点，在含有0.02 M THIQ的1.0 M KOH水溶液中，两电极（CoO@NF||Pt）电解系统在低至1.446 V的电池电压下驱动了10 mA cm的基准电流密度，与全水分解相比降低了174 mV。
