A highly efficient atomically thin curved PdIr bimetallene electrocatalyst
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
- Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, China
- Frontier Institute of Science and Technology jointly with College of Science, Xi’an Jiaotong University, Xi’an 710054, China, Center for Functional Nanomaterials Brookhaven National Laboratory, Upton, NY 11973, USA
- School of Materials Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
- Center for Functional Nanomaterials Brookhaven National Laboratory, Upton, NY 11973, USA
- School of Materials Science and Engineering, Peking University, Beijing 100871, China, College of Engineering, Peking University, Beijing 100871, China
The multi-metallene with an ultrahigh surface area has great potential in precise tuning of surface heterogeneous d-electronic correlation by surface strain effect for the distinctive surface electronic structure, which is a brand new class of promising 2D electrocatalyst for sustainable energy device application. However, achieving such an atomically thin multi-metallene still presents a great challenge. Herein, we present a new synthetic method for an atomic-level palladium-iridium (PdIr) bimetallene with an average thickness of only ∼1.0 nm for achieving superior catalysis in the hydrogen evolution reaction (HER) and the formic acid oxidation reaction (FAOR). The curved PdIr bimetallene presents a top-ranked high electrochemical active area of 127.5 ± 10.8 m2 gPd+Ir−1 in the reported noble alloy materials, and exhibits a very low overpotential, ultrahigh activity and improved stability for HER and FAOR. DFT calculation reveals that the PdIr bimetallene herein has a unique lattice tangential strain, which can induce surface distortion while concurrently creating a variety of concave-convex featured micro-active regions formed by variously coordinated Pd sites agglomeration. Such a strong strain effect correlates the abnormal on-site active 4d10-t2g-orbital Coulomb correlation potential and directly elevates orbital-electronegativity exposure within these active regions, resulting in a preeminent barrier-free energetic path for significant enhancement of FAOR and HER catalytic performance.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1819800
- Alternate ID(s):
- OSTI ID: 1775186
OSTI ID: 2469572
- Journal Information:
- National Science Review, Journal Name: National Science Review Journal Issue: 9 Vol. 8; ISSN 2095-5138
- Publisher:
- Oxford University PressCopyright Statement
- Country of Publication:
- China
- Language:
- English