The unsatisfactory performances and complicated synthesis procedures greatly impeded the large-scale industrial applications of various electrocatalysts. Herein, two different functional electrocatalysts were simultaneously synthesized within one-pot reactor through hydrothermal method. The Co, Fe co-doped carbon dots (CoFe-CDs) with electrocatalytic oxygen evolution reaction (OER) activities and carbon-supported Co, Fe co-doped Ru networks ([email protected]) with hydrogen evolution reaction (HER) activities, were directly obtained from the supernatant and the precipitation, respectively. Benefiting from the synergistic effect of dual-metal doping, the [email protected] exhibited an extremely low overpotential of 4 mV for HER in 1 M KOH electrolyte, which was the lowest value among the previously reported electrocatalysts, and the CoFe-CDs showed excellent OER performance with an overpotential of 320 mV. Moreover, only 1.59 V was needed to achieve 10 mA cm^-2 for overall water-splitting. This work provided an innovative approach for simply creating diverse electrocatalysts and effectively regulating the catalytic activities by introducing multi-metal dopants.

性能差和复杂的合成方法极大地阻碍了各种电催化剂的大规模工业应用。在此，通过水热法在一锅法反应器中同时合成了两种不同的功能性电催化剂。具有电催化氧释放反应（OER）活性的Co，Fe共掺杂碳点（CoFe-CDs）和具有氢释放反应（HER）活性的碳载Co，Fe共掺杂Ru网络（[电子邮件保护]），分别直接从上清液和沉淀中获得。受益于双金属掺杂的协同作用，[受电子邮件保护]在1 M KOH电解质中对HER表现出极低的4 mV过电势，这是先前报道的电催化剂中最低的，CoFe-CDs具有出色的OER性能，超电势为320 mV。此外，仅需1.59 V即可达到10 mA cm^-2用于总水分解。这项工作提供了一种创新的方法，可以简单地创建多种电催化剂，并通过引入多金属掺杂剂有效地调节催化活性。