Affiliation:
1. Key Laboratory Base of Eco‐Chemical Engineering Ministry of Education International Science and Technology Cooperation Base of Eco‐chemical Engineering and Green Manufacturing College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China
2. Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province School of Chemistry and Chemical Engineering Qufu Normal University Qufu Shandong 273165 P. R. China
3. Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China
Abstract
AbstractIntroducing interstitial light atoms shows great potential in improving the intrinsic activity and stability of metal catalysts owing to strongly affecting the electronic structure and adsorption properties. However, filling atomically dispersed light atoms into metal lattices and further unveiling their interstitial effects are still limited by tightly arranged metal lattices. Herein, the study reports a calcination reduction assisted trace light atoms filling strategy to form a series of interstitial light single atoms filled Co‐based catalysts (Co‐X@NF, X = P, N and NF = nickel foam), therefore constructing monometallic atomic interfaces between P‐coordinated Coδ+ and Co0 to promote alkaline hydrogen evolution reaction (HER). Noteworthy, the optimal Co‐P0.43@NF with rich monometallic atomic interfacial structure shows very high turnover frequency values (5.64 s−1), which is close to noble metal level and far exceeds non‐noble metal catalysts. Meanwhile, it maintains excellent stability of 150 h at 100 mA cm−2. Theoretical studies prove that P‐coordinated Coδ+ promotes H2O dissociation and Co0 optimizes H* adsorption energy, thus forming highly active monometallic atomic interfaces, which greatly accelerates the alkaline HER kinetics.
Funder
National Natural Science Foundation of China