题目：

Layered Quasi-Nevskite Metastable-Phase Cobalt Oxide Accelerates Alkaline Oxygen Evolution Reaction Kinetics

作者：

Zhenglong Fan^1,2#, Qintao Sun^1#, Hao Yang¹, Wenxiang Zhu¹, Fan Liao¹, Qi Shao³, Tianyang Zhang¹, Hui Huang¹, Tao Cheng¹, Yang Liu¹, Mingwang Shao¹*, Minhua Shao^2,5* & Zhenhui Kang^1,4*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123 Jiangsu, People’s Republic of China.

²Department of Chemical and Biological Engineering and Energy Institute, The Hong Kong University of Science and Technology, Kowloon, Hong Kong. China.

³College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China.

⁴Macao Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa 999078, Macao, China.

摘要：

Clarifying the structure–reactivity relationship of non-noble-metal electrocatalysts is one of the decisive factors for the practical application of water electrolysis. In this field, the anodic oxygen evolution reaction (OER) with a sluggish kinetic process has become a huge challenge for large-scale production of high-purity hydrogen. Here we synthesize a layered quasi-nevskite metastable-phase cobalt oxide (LQNMP-Co₂O₃) nanosheet via a simple molten alkali synthesis strategy. The unit-cell parameters of LQNMP-Co₂O₃are determined to bea=b= 2.81 Å andc= 6.89 Å with a space group ofP3̅m1 (No. 164). The electrochemical results show that the LQNMP-Co₂O₃electrocatalyst enables delivering an ultralow overpotential of 266 mV at a current density of 10 mA cm_geo^–2with excellent durability. TheoperandoXANES and EXAFS analyses clearly reveal the origin of the OER activity and the electrochemical stability of the LQNMP-Co₂O₃electrocatalyst. Density functional theory (DFT) simulations show that the energy barrier of the rate-determining step (RDS) (from *O to *OOH) is significantly reduced on the LQNMP-Co₂O₃electrocatalyst by comparing with simulated monolayered CoO₂(M-CoO₂).

影响因子：

18.027

分区情况：

一区

链接：

https://pubs.acs.org/doi/10.1021/acsnano.3c11199