焦耳热诱导高效Co-NC电催化剂的合成及裂解海水产氢性能研究

Joule Heating-Induced Synthesis of Co-NC Electrocatalyst for Hydrogen Evolution Reaction in Seawater Splitting

受限于海水中复杂的离子环境,电催化裂解海水要求电催化剂在具有高催化活性的同时,还需要具有高的稳定性。通过焦耳热效应的方法,设计合成了一种MOF衍生的新型Co-NC电催化剂。值得注意的是,该新型的加热方式可以在10 s内达到高温(1400℃),有效地解决了长时间加热过程中活性位点聚集和失活问题。同时,该催化剂还具有丰富的吡啶氮,可以提高催化剂的活性。总之,该催化剂在10 mA/cm^(2)的电流密度下仅需要161 mV,远优于传统的管式炉加热Co-NC的207 mV。同时,该催化剂在稳定性测试中,表现出了优异的稳定性。

Due to the complex ionic environment in seawater,electrocatalytic seawater splitting requires high catalytic activity and stability of electrocatalyst.A novel MOF derived Co-NC electrocatalyst was designed and synthesized by the Joule heating method.It is worth noting that the Joule heating method can reach high temperature(1400℃)within 10 s,which effectively solves the issues of reunion and inactivation the active sites during the long-time heating process.Meanwhile,the catalyst has rich pyridine nitrogen,which can improve the activity of the catalyst.Overall,the catalyst requires only 161 mV at a current density of 10 mA/cm ^(2),which is higher than conventional tubular furnace heating Co-NC(207 mV).Meanwhile,the catalyst shows excellent stability in the long-term stability test.