The rational design and synthesis of efficient electrocatalysts for the hydrogen evolution reaction(HER)are of great importance for alkaline hydrogen production.This study describes a nanocomposite material design,in ...The rational design and synthesis of efficient electrocatalysts for the hydrogen evolution reaction(HER)are of great importance for alkaline hydrogen production.This study describes a nanocomposite material design,in which ultrafine and small(2.0-3.5 nm)Ru nanoparticles coordinated with O atom sites are sup-ported on a carbon matrix formed by C_(60)(OH)_(n)(Ru-O/C-600).The Ru-O bonds create a channel of electron communication to facilitate charge transfer and improve the conductivity of electrocatalysts.The ultrafine and evenly-distributed Ru nanoparticles provide a high density of active sites to extend electro-chemical surface areas.Ru-O/C-600 achieved a low overpotential of 32 mV at a current density of 10 mA cm^(−2) with a small Tafel slope of 51.8 mV dec^(−1) and long-term stability of 50 h.Moreover,Ru-O/C-600 also gave an output of 500 and 1000 mA cm^(−2) with an overpotential of 242 and 383 mV for practical use.These findings open up new avenues for developing Ru-based hybridization materials with enhanced electron transfer and abundant active sites for HER performance.展开更多
基金supported by the National Natural Science Foundation of China(52072226,52073166)Scientific Research Program Funded by Shaanxi Provincial Education Department(No.20JY001)+4 种基金the Xi’an Key Laboratory of Green Manufacture of Ceramic Materials Foundation(No.2019220214SYS017CG039)the Key Program for International S&T Cooperation Projects of Shaanxi Province(2020KW-0382020GHJD-04)Science and Technology Program of Xi’an,China(2020KJRC0009)Science and Technology Resource Sharing Platform of Shaanxi Province(2020PT-022)Dr Y.Q.Feng was grateful for the support from the Science and Technology Youth Stars Project of Shaanxi Province(2021KJXX-35).
文摘The rational design and synthesis of efficient electrocatalysts for the hydrogen evolution reaction(HER)are of great importance for alkaline hydrogen production.This study describes a nanocomposite material design,in which ultrafine and small(2.0-3.5 nm)Ru nanoparticles coordinated with O atom sites are sup-ported on a carbon matrix formed by C_(60)(OH)_(n)(Ru-O/C-600).The Ru-O bonds create a channel of electron communication to facilitate charge transfer and improve the conductivity of electrocatalysts.The ultrafine and evenly-distributed Ru nanoparticles provide a high density of active sites to extend electro-chemical surface areas.Ru-O/C-600 achieved a low overpotential of 32 mV at a current density of 10 mA cm^(−2) with a small Tafel slope of 51.8 mV dec^(−1) and long-term stability of 50 h.Moreover,Ru-O/C-600 also gave an output of 500 and 1000 mA cm^(−2) with an overpotential of 242 and 383 mV for practical use.These findings open up new avenues for developing Ru-based hybridization materials with enhanced electron transfer and abundant active sites for HER performance.
