Article
Chemistry, Physical
Abimbola A. Ashaju, Veerle Otten, Jeffery A. Wood, Rob G. H. Lammertink
Summary: This study aims at unraveling the origin and dynamics of flow hysteresis generated by immobilized bimetallic structures during electrocatalytic reactions under low reactive regimes. Through combined experimental and numerical approaches, key electrocatalytic parameters contributing to flow reversal are analyzed under conditions of bulk pH variations. The interplay between electrocatalytic and electrokinetic phenomena on the occurrence of flow reversal is elucidated through a combination of techniques such as fluorescence lifetime imaging and particle tracking.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Engineering, Environmental
Bo Gao, Xiaoye Du, Yiwei Zhao, Shujiang Ding, Chunhui Xiao, Zhongxiao Song, Woo Seok Cheon, Ho Won Jang
Summary: Phase engineering of transition metal tellurides is a promising strategy for controlling chemical bonding and electronic configuration, and it plays a significant role in designing efficient catalysts. In this study, Co and Ni co-doped MoTe2 nanofilms (Co,Ni-MoTe2) were successfully synthesized, and they exhibited excellent electrocatalytic performance for hydrogen evolution reactions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yafei Zhao, Xue Feng Lu, Guilan Fan, Deyan Luan, Xiaojun Gu, Xiong Wen (David) Lou
Summary: A facile chemical vapor deposition strategy was reported to synthesize single-Ni atoms decorated hollow S/N-doped carbon spheres. The obtained catalyst exhibited outstanding performance for alkaline oxygen evolution reaction and the electrocatalytic mechanism was revealed by experiments and theoretical calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Bing Shao, Xin Chen, Yan-Tong Xu, Guo-Qing Li, Jing-Ping Zhong, Ting Meng, Zhong Zhang, Fu-Ping Huang, Jin Huang
Summary: In this study, a novel Co-based metal-organic nanosheet was constructed and demonstrated excellent electrocatalytic reduction performance of CO2, producing hydrocarbons with high added value, showing potential application prospects.
JOURNAL OF CATALYSIS
(2022)
Article
Engineering, Environmental
Hang-bo Zheng, Yuan-li Wang, Pei Zhang, Feng Ma, Peng-zhao Gao, Wen-ming Guo, Hang Qin, Xiao-pan Liu, Han-ning Xiao
Summary: Research shows that applying an AC magnetic field can significantly enhance the alkaline OER activity at low current densities, but reduce it at high current densities. This phenomenon is attributed to spin conservation, the MHD effect, and the induced electric field caused by the AC magnetic field.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Physical
Santanu Pal, Tanbir Ahmed, Sakila Khatun, Poulomi Roy
Summary: Production of green hydrogen through water electrolysis is desirable for clean energy demand, but faces challenges in terms of energy barriers and economic sustainability. Heterojunctions, which involve material combinations with desired band structures, have emerged as a smart approach to enhance electrocatalytic activities. This review extensively discusses various heterojunctions, interface modifications, thermodynamics, and factors that boost electrocatalytic activities. Heterojunction-based electrocatalysts are not only effective in oxygen and hydrogen evolution reactions, but also in various electrochemical reactions involving decomposition of small molecules at low energy. Hence, heterojunction-based electrocatalysts are expected to be the primary choice for researchers in the future.
ACS APPLIED ENERGY MATERIALS
(2023)
Review
Chemistry, Inorganic & Nuclear
Zhenxing Li, Mingliang Hu, Ping Wang, Jiahao Liu, Jiasai Yao, Chenyu Li
Summary: The article summarizes the design strategies and synthesis methods of various heterojunction catalysts, as well as their applications in the water splitting process. By briefly discussing the current progress in electrocatalytic water splitting, it provides a prospect for the future of heterojunction catalysts in this field.
COORDINATION CHEMISTRY REVIEWS
(2021)
Review
Chemistry, Physical
Shaojun Zhu, Zheng-Jun Wang, Yihuang Chen, Tianrui Lu, Jun Li, Jichang Wang, Huile Jin, Jing-Jing Lv, Xin Wang, Shun Wang
Summary: This review summarizes the recent progress in the study of reaction pathways and catalysts for electrocatalytic nitrobenzene reduction reaction (eNBRR) and proposes future research directions for eNBRR.
Review
Chemistry, Inorganic & Nuclear
Lan Sun, Qiaomei Luo, Zhengfei Dai, Fei Ma
Summary: Water electrolysis is crucial for hydrogen generation, requiring efficient electrocatalysts; Recent advancements include strategies like nanoarchitecturing and heteroatomic doping to enhance electrocatalyst performance; Challenges and opportunities lie ahead for improving water splitting performance.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
Bin Zhao, Dongping Xue, Pengfei Yuan, Wenfu Yan, Jiangwei Zhang, Shichun Mu, Jia-Nan Zhang
Summary: The preparation of single atom Fe-N-C catalysts leads to the formation of oxygen-containing moieties. The contribution of the oxygen-containing part on the oxygen reduction reaction (ORR) conducted with Fe-N-C is often overlooked, and the mechanism of the oxygen-doping structure remains unclear. However, through density functional theory (DFT) calculations, it is found that the adjacent C-O-C structure promotes charge separation and reduces the adsorption of oxygen-containing intermediates, resulting in greatly improved ORR kinetics. Experimental verification further confirms this principle, and the design of FeN4-700/900 catalysts incorporating O-rich biomass carbon substrates demonstrates enhanced ORR activity and excellent Zn-air battery performance. This study provides insights into modulating active sites and practical applications of Fe-N-C catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Physical
Jingqi Guan
Summary: Single-atom catalysts (SACs) are emerging as a novel frontier research field in electrocatalysis due to their outstanding catalytic performance and enrichment of our understanding of reaction mechanisms. The catalytic performances of SACs are significantly influenced by the electronic and geometric structures of isolated metal sites. This review focuses on the effect of coordinated surroundings of isolated metal sites on electrochemical performances, providing methods to reveal the detailed electron structure and coordinated environment of isolated metal sites while documenting important electrochemical applications and structure-function relationships. Additionally, technical challenges and prospects for the progress of high-performance SACs are suggested.
JOURNAL OF POWER SOURCES
(2021)
Review
Chemistry, Multidisciplinary
Liyuan Xiao, Zhenlu Wang, Jingqi Guan
Summary: This paper provides a detailed review of the topological structure design and synthesis methods of covalent organic frameworks (COFs), and analyzes their design principles. It also summarizes the applications of COFs and their derivatives in the field of electrocatalysis, and proposes optimization strategies. Finally, it explores the application prospects and challenges of COFs and their derivatives in electrocatalysis, providing guidance for future research.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yang Hu, Haowen Chen, Qiyang Lu
Summary: This study investigates the phase equilibrium and kinetics of the phase transition in CoOxHy driven by applied electrochemical driving force using operando Raman spectroscopy and operando optical characterization. The researchers found an irreversible phase transition in the first electrochemical test, but the transition became fully reversible in each following cycle. By establishing the relationship between kinetic parameters of the reversible phase transition and applied potential, this work provides a precise approach toward understanding the electrochemically driven phase transition in OER electrocatalysts.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Yifei Xu, Hanwen Yang, Xiaoxia Chang, Bingjun Xu
Summary: Electrocatalytic reactions are crucial for the transition to renewable energy and chemicals. The Tafel analysis is a useful technique to understand reaction mechanisms and establish structure-activity relationships. This tutorial provides guidance on the procedures, assumptions, and potential pitfalls of performing Tafel analysis for electrochemical CO2, CO, and O2 reduction reactions. It also covers basic concepts and relationships among key thermodynamic and kinetic variables for interpreting activation parameters of electrochemical reactions.
ACTA PHYSICO-CHIMICA SINICA
(2023)
Article
Chemistry, Multidisciplinary
Xiaoran Huo, Xiaojiao Zuo, Xin Wang, Bowei Xing, Nannan Zhang
Summary: In this study, CoCrFeNi and CoCrFeNiMo high entropy alloys (HEAs) powders are proposed as bifunctional electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). The prepared samples exhibit relatively good electrocatalytic activity for HER with overpotentials of 156.7 mV and 160.5 mV in a 1.0 M KOH solution, respectively. The CoCrFeNiMo catalyst demonstrates significantly higher OER activity than commercial RuO2 and delivers a cell voltage of 1.86 V for water splitting at a current density of 10 mA cm(-2).
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Nicole A. B. Timmerhuis, Rob G. H. Lammertink
Summary: Diffusiophoresis is the movement of particles caused by a concentration gradient. This study examines the diffusiophoresis of polystyrene particles in different solutes and compares the experimental results with a numerical model. The results show good agreement between the experiments and the model for inorganic and organic salts, but not for weak acids.
Correction
Engineering, Chemical
Shuyana A. Heredia Deba, Bas A. Wols, Doekle R. Yntema, Rob G. H. Lammertink
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Moritz A. Junker, Wiebe M. de Vos, Joris de Grooth, Rob G. H. Lammertink
Summary: A novel method of making nanofiltration membranes is to use the Layer-by-Layer method, which involves coating polyelectrolytes alternately on a porous ultrafiltration membrane to form a controllable nanometer-thin separation layer known as Polyelectrolyte Multilayer (PEM). Understanding the structural properties of PEMs and their relationship to coating conditions and membrane performance is crucial for membrane optimization. In this study, the separation performance of NF PEM membranes based on different polymer systems (PDADMAC/PSS and PAH/PAA) was investigated by analyzing the structure of the membrane, particularly the pore size distribution.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Burak Akdeniz, Jeffery A. Wood, Rob G. H. Lammertink
Summary: Chemically induced transport methods provide new opportunities for colloidal transport in dead-end channel geometries. Diffusiophoresis, which involves particle movement under an electrolyte concentration gradient, has been previously demonstrated in such channels. This study shows that concentration-dependent zeta potentials are necessary for accurately describing particle transport in dead-end channels when the zeta potential strongly depends on electrolyte concentration. Simulations incorporating concentration-dependent zeta potentials match experimental observations, while simulations using constant zeta potentials fail to capture particle dynamics. These findings contribute to a better understanding of diffusiophoresis and the diffusio-osmosis process.
Article
Chemistry, Physical
Thejas Hulikal Chakrapani, Hanieh Bazyar, Rob G. H. Lammertink, Stefan Luding, Wouter K. den Otter
Summary: Darcy's law describes the flow of Newtonian fluids through porous media, while Brinkman extended it by adding a viscous stress term. The validity and value of Brinkman's term have been debated since its introduction.
Article
Engineering, Chemical
Harm T. M. Wiegerinck, Reinder Kersten, Jeffery A. Wood
Summary: Numerous theoretical studies have been conducted to better understand the ion transport in a continuous cross-flow shock electrodialysis process. These studies have assumed a constant surface charge, but this work considers the influence of charge regulation caused by changes in salt concentration. The results indicate that including charge regulation requires higher potentials to achieve the same degree of desalination, and operating at higher potentials can lead to substantial Joule heating and temperature increases. The required energy input for desalination is still much higher than the thermodynamic minimum even in the nonisothermal case with charge regulation. This highlights the importance of charge regulation in a shock electrodialysis process.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Chemical
Harmen J. Zwijnenberg, Alaaeldin A. E. Elozeiri, Joris de Grooth, Walter G. J. van der Meer, Jeffery A. Wood
Summary: Efficient recovery of ammonium from dilute streams remains a challenge, but Donnan dialysis shows promise for separating and concentrating ammonium. A mass transport model based on film theory was used to predict the behavior of ammonium and potassium in different types of membranes, and the model accurately described experimental data. The results showed that the two-stage ammonium removal process could be accurately predicted, and both plate and frame and hollow fiber modules had similar transport rates.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Shuyana A. Heredia Deba, Bas A. Wols, Doekle R. Yntema, Rob G. H. Lammertink
Summary: Membranes with different TiO2 top layer thicknesses were fabricated and characterized. The optimal photocatalyst thickness was found to be 2.74 μm for single-layer membranes, while an increase in degradation was observed for membranes with multiple TiO2 layers. A mass transport and reaction model was developed to describe the coating thickness effect.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Shuyana A. Heredia Deba, Bas A. Wols, Doekle R. Yntema, Rob G. H. Lammertink
Summary: The impact of UV light intensity and distribution on the semiconductor surface during the degradation of organic compounds in water was studied using a mono and a multi-LED lamp. The electromagnetic radiation profile on the surface of the membrane was scanned and evaluated. Comparing two lamp configurations, a 20% higher degradation was achieved with the most homogeneous light distribution. The surface reaction constant increased linearly with the irradiation intensity for the most homogeneous illumination distribution.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Engineering, Chemical
Moritz A. Junker, Esra te Brinke, Clara M. Vall Compte, Rob G. H. Lammertink, Joris de Grooth, Wiebe M. de Vos
Summary: Polyelectrolyte multilayers (PEMs) show promise as selective layers in nanofiltration (NF) due to their simplicity, controlled layer thickness, and versatility. Combining two different PEMs in an asymmetric structure allows further optimization. This study combines experimental filtration and theoretical models to describe the effective structure of an asymmetric PEM made of PAH/PSS and PAH/PAA. The obtained membrane properties suggest a distinct layer structure, and there is a fundamental difference in the retention of salt and polyethylene glycol molecules, attributed to different exclusion mechanisms.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
Sam B. Rutten, Moritz A. Junker, Lucia Hernandez Leal, Wiebe M. de Vos, Rob G. H. Lammertink, Joris de Grooth
Summary: Nanofiltration (NF) is a promising technology for treating water sources with increasing micropollutant (MP) concentrations. Understanding the influence of solution composition on filtration performance is important. This study investigated the impact of dominant salts on the removal of trace MPs by commercial hollow fiber NF membranes. The presence of a dominant salt significantly altered MP transport behavior, with a higher mobility of MPs observed in the dNF80 membrane.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
A. A. M. Abusultan, J. A. Wood, T. Sainio, A. J. B. Kemperman, W. G. J. van der Meer
Summary: Reverse osmosis (RO) membrane technology is increasingly used for large-scale production of potable water. However, the acidic and unbuffered RO permeate can damage water piping networks. Remineralization using an ion exchange resin - bipolar membrane electrodialysis hybrid process can protect the water distribution network. This study investigates the use of preparative ion exchange chromatography principles for monovalent-divalent ion separation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
A. A. M. Abusultan, J. A. Wood, T. Sainio, A. J. B. Kemperman, W. G. J. van der Meer
Summary: Reverse osmosis (RO) membrane technology is widely used for producing high-quality drinking water. An ion exchange resin - bipolar membrane electrodialysis hybrid process was developed for sustainable RO permeate remineralization. The most suitable resin for the remineralization process should have high selectivity for calcium and magnesium and low selectivity for monovalent ions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Harm T. M. Wiegerinck, Reinder Kersten, Jeffery A. Wood
Summary: This work investigates the influence of charge regulation on the performance of a shock electrodialysis cell. The results show that including charge regulation requires higher potentials to achieve the same degree of desalination compared to the constant surface charge model. It also highlights the potential for substantial Joule heating and temperature increases at higher potentials.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
