Alkali Metals Activated High Entropy Double Perovskites for Boosted Hydrogen Evolution Reaction

Alkali Metals Activated High Entropy Double Perovskites for Boosted Hydrogen Evolution Reaction

Abstract An efficient and facile water dissociation process plays a crucial role in enhancing the activity of alkaline hydrogen evolution reaction (HER). Considering the intricate influence between interfacial water and intermediates in typical catalytic systems, meticulously engineered catalysts sh...

Full description

Saved in:
Bibliographic Details
Main Authors: Ning Sun, Zhuangzhuang Lai, Wenbo Ding, Wenbo Li, Tianyi Wang, Zhichuan Zheng, Bowen Zhang, Xiangjiang Dong, Peng Wei, Peng Du, Zhiwei Hu, Chih‐Wen Pao, Wei‐Hsiang Huang, Haifeng Wang, Ming Lei, Kai Huang, Runze Yu
Format: Article
Language:English
Published: Wiley 2024-11-01
Series:Advanced Science
Subjects:
alkali metal
double perovskite
high entropy
hydrogen evolution reaction
super‐exchange interaction
Online Access:https://doi.org/10.1002/advs.202406453
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract An efficient and facile water dissociation process plays a crucial role in enhancing the activity of alkaline hydrogen evolution reaction (HER). Considering the intricate influence between interfacial water and intermediates in typical catalytic systems, meticulously engineered catalysts should be developed by modulating electron configurations and optimizing surface chemical bonds. Here, a high‐entropy double perovskite (HEDP) electrocatalyst La2(Co1/6Ni1/6Mg1/6Zn1/6Na1/6Li1/6)RuO6, achieving a reduced overpotential of 40.7 mV at 10 mA cm−2 and maintaining exemplary stability over 82 h in a 1 m KOH electrolyte is reported. Advanced spectral characterization and first‐principles calculations elucidate the electron transfer from Ru to Co and Ni positions, facilitated by alkali metal‐induced super‐exchange interaction in high‐entropy crystals. This significantly optimizes hydrogen adsorption energy and lowers the water decomposition barrier. Concurrently, the super‐exchange interaction enhances orbital hybridization and narrows the bandgap, thus improving catalytic efficiency and adsorption capacity while mitigating hysteresis‐driven proton transfer. The high‐entropy framework also ensures structural stability and longevity in alkaline environments. The work provides further insights into the formation mechanisms of HEDP and offers guidelines for discovering advanced, efficient hydrogen evolution catalysts through super‐exchange interaction.
ISSN:2198-3844

Similar Items