| 贺凡,伍人先,程子业,杨艳,李佳欣,张威,俞峰苹,祁志福.化学通报,2025,88(2):219-226. |
| 电化学改性Ag纳米颗粒用于CO2电催化还原 |
| Electrochemically modified Ag nanoparticles for CO2 electrocatalytic reduction |
| 投稿时间：2024-09-18 修订日期：2024-10-29 |
| DOI： |
| 中文关键词: CO2电催化 银基电极 膜电极电解池 电化学改性 |
| 英文关键词:CO2 electrocatalysis, silver-based electrode, MEA reactor, electrochemical modification |
| 基金项目:浙江省重点研发计划项目(2022C03040)、浙江省能源集团有限公司项目(ZNKJ-2021-111)和浙江浙能科技环保集团股份有限公司项目(TD-KJ-21-008)资助 |
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| 中文摘要: |
| 发展CO2电催化还原技术有利于加速净零碳排放社会的构建，在减少CO2排放对环境影响的同时，结合可再生能源将电能转化为化学能，可以减少弃风弃电现象的发生。CO2电催化反应性能依赖于催化剂、反应器及电解工艺的开发和优化，其中，一些具有进一步放大潜力的材料和结构将推动CO2电催化技术从实验室层面走向工业化应用阶段。在催化剂方面，人们已经探索和合成了大量用于还原CO2制CO的材料，其中，Ag具有催化性能高、价格低廉且化学稳定性好等优势，是短期内最有希望用于CO2规模化制备CO的电催化剂。在本工作中，我们采用商业Ag纳米颗粒作为原材料，开发了一种简便的电化学改性方法，经电化学氧化-还原后，Ag纳米颗粒的催化性能显著提高，在H型电解池内，当电位为-0.88 V vs.RHE时，CO的法拉第效率提升至97%，随后，我们将改性后的Ag纳米颗粒应用于零间隙膜电极反应器（zero-gap MEA）内，CO2电催化制CO的选择性和电解电压在大电流密度（≥100 mA cm-2）均得到了提升。 |
| 英文摘要: |
| The development of CO2 electrocatalytic reduction technology is conducive to accelerating the construction of a net-zero carbon emission society. While reducing the impact of CO2 emissions on the environment, it can combine renewable energy to convert electrical energy into chemical energy, which can reduce the occurrence of wind and electricity abandonment. The performance of CO2 electrocatalytic reactions depends on the development and optimization of catalysts, reactors and electrolysis processes. Among them, some materials and structures with further amplification potential will promote CO2 electrocatalytic technology from the laboratory level to the industrial application stage. In terms of catalysts, people have explored and synthesized a large number of materials for reducing CO2 to produce CO. Among them, Ag has the advantages of high catalytic performance, low price and good chemical stability, and is the most promising for large-scale preparation of CO2 in the short term. CO electrocatalyst. In this work, we used commercial Ag nanoparticles as raw materials and developed a simple electrochemical modification method. After electrochemical oxidation-reduction, the catalytic performance of Ag nanoparticles was significantly improved. In an H-type electrolytic cell, When the potential is -0.88 V vs. RHE, the Faradaic efficiency of CO increases to 97%. Subsequently, we apply the modified Ag nanoparticles to the zero-gap membrane electrode reactor (zero-gap MEA) for CO2 electrocatalysis. The selectivity and electrolysis voltage of CO production have been improved at large current densities (≥100 mA cm-2). |
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