The construction of high-efficiency long-stable catalytic electrodes for hydrogen by seawater splitting is a huge challenge in the field of green hydrogen generation.Herein,a matrix-type titanium dioxide nanorod(Ti/Ti...The construction of high-efficiency long-stable catalytic electrodes for hydrogen by seawater splitting is a huge challenge in the field of green hydrogen generation.Herein,a matrix-type titanium dioxide nanorod(Ti/TiO_(2))is constructed on the titanium plate(Ti)by one-step oxidative etching,and a two-dimensional self-supporting electrode with good stability and“local photothermal effect”strategy is con-structed as a self-supporting electrode by carbon quantum dots(CDs)“inserted”self-growing iron boron(CDs-FeB_(x)@TiO_(2)).Based on the microstructure regulated by CDs,the in situ growth of FeB with high con-ductivity and high authenticity activity,the effective separation of electron-hole pairs in the TiO_(2) structure is promoted,and efficient photothermal seawater electrolysis is realized.The performance of hydrogen/oxygen evolution reaction(HER/OER)and overall seawater splitting of the highly active CDs-FeB_(x)@TiO_(2) electrode increased by 14.7%,16.2%and 4.4%at 10 mA cm^(−2) in alkaline simulated seawater.The CDs-FeB_(x)@TiO_(2) electrode remains durable for 70 days at 100 mA cm^(−2) and even at industrial current density,and the catalytic activity remained at 93.5%.This work provides a simple way for the preparation of cata-lytic electrodes with high activity and excellent stability and provides theoretical support for the practical application of high purity hydrogen from seawater.展开更多
基金support from the National Natural Science Foundation of China(Grant No.22109098)the Natural Science Foundation of Shanghai(23ZR1443900)+1 种基金Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices,Soochow University(KJS2207)National Natural Science Foundation of China(Grant No.22178309).
文摘The construction of high-efficiency long-stable catalytic electrodes for hydrogen by seawater splitting is a huge challenge in the field of green hydrogen generation.Herein,a matrix-type titanium dioxide nanorod(Ti/TiO_(2))is constructed on the titanium plate(Ti)by one-step oxidative etching,and a two-dimensional self-supporting electrode with good stability and“local photothermal effect”strategy is con-structed as a self-supporting electrode by carbon quantum dots(CDs)“inserted”self-growing iron boron(CDs-FeB_(x)@TiO_(2)).Based on the microstructure regulated by CDs,the in situ growth of FeB with high con-ductivity and high authenticity activity,the effective separation of electron-hole pairs in the TiO_(2) structure is promoted,and efficient photothermal seawater electrolysis is realized.The performance of hydrogen/oxygen evolution reaction(HER/OER)and overall seawater splitting of the highly active CDs-FeB_(x)@TiO_(2) electrode increased by 14.7%,16.2%and 4.4%at 10 mA cm^(−2) in alkaline simulated seawater.The CDs-FeB_(x)@TiO_(2) electrode remains durable for 70 days at 100 mA cm^(−2) and even at industrial current density,and the catalytic activity remained at 93.5%.This work provides a simple way for the preparation of cata-lytic electrodes with high activity and excellent stability and provides theoretical support for the practical application of high purity hydrogen from seawater.
