Improved Catalyst Performance for the Oxygen Evolution Reaction under a Chiral Bias

被引:2
|
作者
Vadakkayil, Aravind [1 ]
Dunlap-Shohl, Wiley A. [1 ]
Joy, Meera [1 ]
Bloom, Brian P. [1 ]
Waldeck, David H. [1 ]
机构
[1] Univ Pittsburgh, Chem Dept, Pittsburgh, PA 15260 USA
来源
ACS CATALYSIS | 2024年 / 14卷 / 23期
基金
美国国家科学基金会;
关键词
oxygen evolution reaction; chiral inducedspin selectivity; water splitting; spin catalysis; Monte Carlomodel; WATER OXIDATION; SPIN POLARIZATION; ELECTRONS;
D O I
10.1021/acscatal.4c04477
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The oxygen evolution reaction (OER) remains an important bottleneck for widespread implementation of a hydrogen economy. While improvements in the OER can be realized by spin polarizing the reaction intermediates, these methods often rely on applying external magnetic fields to ferromagnetic catalysts or by adsorbing chiral molecules onto the catalyst. Here, we show that the addition of chiral additives to the conductive binder supporting the catalysts enhances the selectivity for O2 formation and results in exceedingly high mass activities. The results are explained within the context of a statistical model in which the additives are hypothesized to act as a localized chiral bias that enhances radical intermediate coupling. More broadly, these studies illustrate a flexible design motif for improving OER catalysis that persists under different pH conditions, is independent of the choice of catalyst, and can be extrapolated to other chemical reactions.
引用
收藏
页码:17303 / 17309
页数:7
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