An alternative photochemical water oxidation pathway driven by halide ions as electron relay

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-04-14 DOI:10.1016/j.apcata.2025.120287

Chaowei Peng, Miao Shui, Haorui Wang, Hongfei Liu

引用次数: 0

Abstract

The development of robust catalysts to drive the water oxidation half reaction, i.e. oxygen evolution, is crucial to achieve efficient artificial photosynthesis toward clean solar fuel production. The use of [Ru^II(bpy)₃]²⁺ as photosensitizer and S₂O₈^2- as electron acceptor has been established as a standard photochemical protocol for activity assessment and mechanistic study of synthetic water oxidation catalysts. While a metal-based catalyst is considered indispensable for oxygen evolution therein, we here report that halide (Cl^- and Br^-) ions alone can straightforwardly drive water oxidation through acting as electron relays (X^-→X₂→XO^-→O₂). This may open up new strategies to manage the demanding four-electron transfer kinetics of the photocatalytic oxygen evolution reaction.

查看原文本刊更多论文

卤化物离子作为电子继电器驱动的另一种光化学水氧化途径

开发强大的催化剂来驱动水氧化半反应，即析氧，是实现高效的人工光合作用以清洁太阳能燃料生产的关键。以[RuII(bpy)3]2+为光敏剂，S2O82-为电子受体，建立了合成水氧化催化剂活性评价和机理研究的标准光化学方案。虽然金属基催化剂被认为是析氧过程中不可缺少的，但我们在这里报道了卤化物（Cl-和Br-）离子可以通过电子继电器（X-→X2→XO-→O2）直接驱动水氧化。这可能为管理光催化析氧反应的苛刻的四电子转移动力学开辟了新的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.