Article
Chemistry, Multidisciplinary
Sophia Weng, Wei Lun Toh, Yogesh Surendranath
Summary: The rates and selectivity of electrochemical CO2 reduction are influenced by the identity of alkali metal cations. This study shows that Au- and Ag-catalyzed CO2 reduction can occur with weakly coordinating tetraalkylammonium cations. Competition experiments reveal that the organic cation can exclusively control the selectivity and activity of CO2 reduction. These findings suggest the potential use of water-soluble organic cation salts as supporting electrolytes for CO2 electrolysis.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Engineering, Environmental
Yan Tian, Da Li, Chao Li, Jia Liu, Jing Wu, Guohong Liu, Yujie Feng
Summary: The developed MRECC system utilizes energy extracted from salinity gradient and wastewater to drive CO2 reduction into formate, showing promising results under optimal conditions and demonstrating potential and advantages.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Huei-Ru ''molly'' Jhong, Uzoma O. Nwabara, Sofia Shubert-Zuleta, Nicholas S. Grundish, Bharat Tandon, Lauren C. Reimnitz, Corey M. Staller, Gary K. Ong, Camila A. Saez Cabezas, John B. Goodenough, Paul J. A. Kenis, Delia J. Milliron
Summary: Electroreduction of CO2 to formate using Sn-doped ITO nanocrystal catalysts in an alkaline flow electrolyzer shows high selectivity, low onset potential, and high partial current density for HCOO- production. This research holds significance in the field of carbon fuel production.
CHEMISTRY OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zhen Qi, Monika M. Biener, Ajay R. Kashi, Sara Hunegnaw, Alvin Leung, Sichao Ma, Ziyang Huo, Kendra P. Kuhl, Juergen Biener
Summary: Integrating ultrathin monolithic nanoporous gold catalyst coatings in a large electrode area electrochemical membrane reactor with gas diffusion electrodes has shown an increase in CO Faraday efficiency with thicker layers. The configuration of a single npAu leaf layer demonstrates an extremely high CO current density, showing potential for commercial applications.
MATERIALS RESEARCH LETTERS
(2021)
Article
Chemistry, Physical
Aram Yoon, Jeffrey Poon, Philipp Grosse, See Wee Chee, Beatriz Roldan Cuenya
Summary: In this study, the impact of iodide treatment on the selectivity and morphology of Cu island arrays in the electrocatalytic reduction of CO2 was investigated. Results from electrochemical transmission electron microscopy revealed that the Cu islands transformed into tetrahedral CuI and formed 3-dimensional chains of copper nanoparticles under CO2RR conditions. The findings demonstrate the significant influence of iodide on the prevailing morphologies during CO2RR.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Haojie Dai, Rui Cui, Chuanshuang Chen, Jiatian Song, Jinghan Li, Lize Dong, Chunyang Yu, Wenfeng Jiang, Yongfeng Zhou
Summary: Inspired by carbon monoxide dehydrogenase (CODH), mimicking its inner and outer spheres is a promising strategy in CO2 reduction catalyst design. An aqueous CODH mimic with both inner and outer spheres for photocatalysis is developed, showing comparable performance with other molecular catalysts in aqueous solution. The coordination sphere effects play a significant role in improving the aqueous photocatalytic CO2 reduction performance of CODH mimics.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Qiang Luo, Hanyi Duan, Michael C. McLaughlin, Kecheng Wei, Joseph Tapia, Joseph A. Adewuyi, Seth Shuster, Maham Liaqat, Steven Suib, Gael Ung, Peng Bai, Shouheng Sun, Jie He
Summary: We used polymer N-heterocyclic carbenes (NHCs) to control the microenvironment surrounding metal nanocatalysts, enhancing their catalytic performance in CO2 electroreduction. Three polymer NHC ligands were designed with different hydrophobicity: hydrophilic poly(ethylene oxide) (PEO-NHC), hydrophobic polystyrene (PS-NHC), and amphiphilic block copolymer (PEO-b-PS-NHC). The introduction of hydrophobic PS segments led to a twofold increase in the partial current density for CO formation. The hydrophobic polymers altered the hydrogen bonding structures of water, improving CO2 diffusion and subsequent reduction.
Article
Chemistry, Physical
Piyush Chauhan, Juan Herranz, Maximilian Winzely, Maximilian Georgi, Pavel Khavlyuk, Alexander Eychmueller, Thomas J. Schmidt
Summary: Despite increased relevance in energy transition, understanding of CO2 reduction reaction (CO2RR) is still limited, especially regarding the impact of surface-specific parameters such as interfacial pH on its kinetics and product outcome. In this study, CO2RR on polycrystalline Au and Au aerogel was investigated using a rotating ring-disk electrode (RRDE) setup, with the quantification of interfacial pH through measuring the pH value of the gold ring electrode. The results showed that the polycrystalline Au surface had approximately twice the current efficiency compared to the aerogel surface, suggesting a roughness factor effect on this key performance metric.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Mark Sassenburg, Reinier de Rooij, Nathan T. Nesbitt, Recep Kas, Sanjana Chandrashekar, Nienke J. Firet, Kailun Yang, Kai Liu, Marijn A. Blommaert, Martin Kolen, Davide Ripepi, Wilson A. Smith, Thomas Burdyny
Summary: Continued advancements in the electrochemical reduction of CO2 have shown that reactivity, selectivity, and stability are not solely determined by material properties but also influenced by catalyst, double-layer, reaction environment, and system configuration. This study aims to re-characterize the activity, selectivity, and stability of the five most utilized transition metal catalysts for CO2 reduction at elevated reaction rates. Through electrochemical operation, physical characterization, and varied operating parameters, the study provides a renewed resource and point of comparison for researchers. The findings highlight the differences between CO-producing catalysts and demonstrate the instability of certain catalysts in specific environments.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Multidisciplinary Sciences
Jinkyu Lim, So Young Choi, Jae Won Lee, Sang Yup Lee, Hyunjoo Lee
Summary: The integration of CO2 electrolysis with microbial fermentation was achieved to directly produce PHB from gaseous CO2. The biohybrid system comprised electrolytic conversion of CO2 to formate and subsequent conversion of formate to PHB by microbial cells. Optimization of the electrolyzer and electrolyte solution allowed for efficient accumulation of PHB. This system was further modified for continuous PHB production.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Zixu Tao, Adam J. Pearce, James M. Mayer, Hailiang Wang
Summary: In this study, the mechanism of CO2 reduction to CO on Au catalyst was investigated using an improved spectroelectrochemical system. The Au surface was found to restructure, leading to an increased number of bridge sites for CO adsorption. It was shown that bridge-bonded *CO species (*COB) are active intermediates for CO2 reduction to CO on the Au electrode.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Taishi Xiao, Yao Ma, Shicheng Zeng, Xiang Yao, Tong Ye, Hongbin Li, Wei Li, Zhengzong Sun
Summary: The proton antagonist strategy is effective in suppressing hydrogen evolution reaction in CO2 electrolysis, resulting in improved Faradaic efficiency and energy efficiency for CO production. Moreover, the proton antagonist membrane outperforms commercial anion exchange membrane in terms of conductivity and oxidation resistance lifetime.
Review
Chemistry, Inorganic & Nuclear
Naohiro Fujinuma, Samuel E. Lofland
Summary: The effects of climate change and finite fossil fuel supply have led to the research on the electrocatalytic reduction of CO2. The demand for multi-carbon feedstock offers financial incentives, accelerating the search for solutions to the climate problem, but the technology is still in the process of being commercialised, with the use of ambient CO2 as a prerequisite.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Electrochemistry
Qiqi Wan, Lei Yuan, Yuanting Peng, Donghao Ye, Yingying Liu, Wenxing Jiang, Jin Li, Longhai Zhang, Junbo Hou, Xiaodong Zhuang, Junliang Zhang, Changchun Ke
Summary: This study focuses on the impact of the gas diffusion layer (GDL) on the performance of phthalocyanine cobalt (CoPc)-based gas diffusion electrode (GDE) to catalyze CO2 to CO. The hydrophobicity and pore characteristics of GDL were tuned through PTFE impregnation to enhance the CO2 electrochemical reduction reaction (CO2ERR). The designed GDL substrate achieved high current density and Faradaic efficiency for CO, representing the highest performance of CoPc-based GDEs reported in the literature.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Sunmoon Yu, Dohyung Kim, Zhiyuan Qi, Sheena Louisia, Yifan Li, Gabor A. Somorjai, Peidong Yang
Summary: The research demonstrates that surface ligands on nanoparticles can form an ordered ligand layer through ligand interactions, which can enhance the efficiency of CO2 conversion.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
