摘要
The practicality of electrochemical water-splitting technology relies on the development of novel and efficient bifunctional electrocatalysts capable of facilitating both the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Black phosphorus(BP)holds tremendous promise for HER and OER electrocatalysis owing to its fully exposed atoms and high carrier mobility.However,the elec-trocatalytic performance of BP is still much lower than the expected theoretical limit,presenting an exciting challenge for further advancements.Herein,we embed electrochemically exfoliated few-layer BP nanosheets in higher Fermi level(EF)of cobalt,nitrogen co-doped carbons to form a new heterojunction(CoNC-BP),as efficient bifunctional electrocatalysts toward HER and OER for the advancement overall water splitting applications.A directed interfacial electron transfer is realized from CoNC to BP,facilitated by the lowering Fermi level(EF).This interfacial electron transfer plays a crucial role in optimizing the adsorption and desorption of active intermediates,while also introducing an abundance of hypervalent Co sites.These factors collectively contribute to the remarkable electrocatalytic activities of HER and OER performance,leading to the efficient performance of the developed CoNC-BP heterojunction in water-splitting applications.This work demonstrates a promising breakthrough that can inspire the design of high-efficiency catalysts.
基金
National Natural Science Foundation of China(Grant No.62004143)
Key R&D Program of Hubei Province(Grant No.2022BAA084)
Natural Science Foundation of Hubei Province(Grant No.2021CFB133)
National Key R&D Program of China(Grant No.2022YFC3902703)
Innovation Project of Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education(Grant No.LCX2021003)
Open Research Fund of Key Laboratory of Material Chemistry for Energy Conversion and Storage(HUST),Ministry of Education(Grant No.2021JYBKF05)
14th Graduate Ed-ucation Innovation Fund of Wuhan Institute of Technology(Grant Nos.CX2022564 and CX2022451).
