Developing silicon-based photocathodes for CO2 conversion

IF 9.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Science China Chemistry Pub Date : 2024-05-11 DOI:10.1007/s11426-024-2041-9

Weijie Zhuang, Miao Kan, Tao Meng, Jinlong Zhang

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Abstract

Photoelectrochemical (PEC) conversion of CO₂ presents a promising avenue for solar-driven chemical fuel production, with silicon emerging as a cost-effective and high-light-absorbing material pivotal to this technology. Aiming at exploring opportunities for industrializing PEC CO₂ reduction (PEC-CO₂R) by minimizing reaction energy consumption, enhancing reaction efficiency and selectivity, this review summarizes recent advancements in developing Si-based photocathodes for PEC-CO₂R. It outlines the fundamental principles, advantages, and limitations of Si photocathodes with key performance metrics. Based on this understanding, the strategies to enhance the performance of the PEC-CO₂R system, including light absorption, charge separation, and catalytic reactions are categorized as the interfacial modification, active site decoration, and protective layer design. The design ideas of this advantageous three-layer structure in promoting the efficiency, stability, and selectivity have been clarified. Then, this review scrutinizes the influence of the photocathodic chemical environment. This review consolidates the mechanism insights and notable breakthroughs of various fuel generation processes within Si-based PEC-CO₂R systems. Providing this wealth of information offers an up-to-date perspective on the dynamic developments in silicon-based PEC-CO₂ conversion and underscores the promising pathways toward the sustainable fuel synthesis from pollutant CO₂.

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开发用于二氧化碳转化的硅基光电阴极

二氧化碳的光电化学（PEC）转化为太阳能驱动的化学燃料生产提供了一条前景广阔的途径，而硅作为一种具有成本效益和高吸光性的材料正在成为这项技术的关键。本综述旨在通过最大限度地降低反应能耗、提高反应效率和选择性来探索 PEC CO2 还原（PEC-CO2R）工业化的机会，总结了最近在开发用于 PEC-CO2R 的硅基光电阴极方面取得的进展。文章概述了硅基光电阴极的基本原理、优势和局限性以及关键性能指标。在此基础上，将提高 PEC-CO2R 系统性能（包括光吸收、电荷分离和催化反应）的策略分为界面改性、活性位点装饰和保护层设计三类。本综述阐明了这种具有优势的三层结构在提高效率、稳定性和选择性方面的设计思路。然后，本综述仔细研究了光阴极化学环境的影响。本综述整合了硅基 PEC-CO2R 系统中各种燃料生成过程的机理见解和显著突破。这些丰富的信息提供了硅基 PEC-CO2 转换动态发展的最新视角，并强调了从污染物 CO2 中合成可持续燃料的前景广阔的途径。

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.