CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Mengke Li,Zhiguo He,Hui Zhong,Wei Sun,Liang Hu,Mengqi Luo
A novel ternary composite catalyst (FeOOH/Fe 2 O 3 /(Fe 0.67 Mn 0.33 )OOH ) directly prepared from electrolytic manganese residue was applied for terpineol degradation in this study. The reaction system could remove 76.8% of chemical oxygen demand (COD) from simulated water containing terpineol (100 mg/L), while the degradation process could be accelerated under alkaline condition (84.6% at pH 9.0). The degradation performances of Fe 2 O 3 , FeOOH and (Fe 0.67 Mn 0.33 )OOH indicated that the in-situ formed (Fe 0.67 Mn 0.33 )OOH riched in oxygen vacancies (O V ) could promote the PMS activation activity of catalyst mainly ascribed by enhancing interfacial electron transfer . The · OH was the primary active radical, the production of which was favored by the metal−OH. This ternary composite catalyst had anti-jamming ability toward most common ions. Further, this system also displayed an outstanding degradation ability for actual mineral processing wastewater (93.2% COD removal). The developed system expanded the horizon for the high-value utilization of metallurgical slag and the treatment of refractory organic pollutants in mineral processing wastewater.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2020
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IF 16.683
Qi Sun,Ting Cheng,Zhirong Liu,Limin Qi
BiVO 4 is one of the most promising photoanode materials for photoelectrochemical (PEC) water splitting, but it usually suffers from severe charge recombination. In this work, cobalt silicate (Co-Sil) was decorated on a nanoporous BiVO 4 photoanode as a novel cocatalyst by photoelectrophoretic deposition that integrated photoelectrochemical oxidation and electrophoretic deposition. The resultant BiVO 4 /Co-Sil photoanode reached a photocurrent density of 5.0 mA/cm 2 at 1.23 V RHE , around 3-fold enhancement compared with the pristine BiVO 4 photoanode. Detailed PEC measurements combined with density functional theory calculations revealed that the excellent performance of the Co-Sil cocatalyst could be attributed to the electron transfer from Co-Sil to BiVO 4 , the reduced overpotential of the OOH* formation, and the photoelectrochemical oxidation of Co(II). Furthermore, a high photostability was achieved for the BiVO 4 /Co-Sil photoanode by dissolving NaVO 3 in the electrolyte. This work may provide new insights on the rational design and effective fabrication of promising cocatalysts for solar water splitting.
研究领域:
材料科学
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光化学
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电化学
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可再生能源
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Jie Wu,Yuanyuan Zhang,Bin Zhang,Siwei Li,Ping Xu
Development of low-cost, efficient, and durable electrocatalysts for the oxygen evolution reaction (OER) is crucial for multiple energy conversions and storage devices. Herein, Zn-doped CoS2 nanoarrays supported on carbon cloth, Co(Zn)S2/CC, are fabricated through a facile sulfidization of CoZn metal–organic frameworks. This precatalyst, Co(Zn)S2/CC, with a well-defined nanoarray structure affords excellent OER catalytic activity (η = 248 mV at 10 mA/cm2) and long-term durability in 1 M KOH. X-ray photoelectron and in situ Raman spectroscopic studies indicate that Co(Zn)S2 undergoes surface reconstruction with the generation of Co(Zn)OOH adsorbed with SO42– at the surface during the OER process. The Zn dopant is calculated to impact on the electronic structure of Co species and further the adsorption of intermediates. This work not only provides a novel method for the synthesis of bimetallic sulfides but also gives insights into the doping effect on the OER performance of transition metal sulfides.
研究领域:
电化学
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材料科学
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能量转换与存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Duo Xu,Chenchangxiang Wang,Xiaochen Hu,Qiming Sun,Weigao Zhong,Qiangli lv,Haoran Guo,Hua Wang,Zhouhang Li,Kongzhai Li,Zhishan Li
The oxygen evolution reaction (OER) plays a crucial role in hydrogen production, but its potential is limited by the lack of scalable and stable electrocatalysts for industrial applications. In this study, we developed a repeated impregnation-drying co-precipitation (RIP) method to prepare CoFe-based OER electrocatalysts. We found that the optimized FeCo(OOH) x -5/NF catalyst achieves an overpotential of 340 mV at 500 mA cm −2 , significantly outperforming catalysts prepared via hydrothermal or chemical bath deposition methods. The RIP method accelerates the co-precipitation rate of metal ions and helps repair defects between the catalytic layer and the nickel foam substrate, promoting the three-dimensional growth of the catalyst layer. Notably, the entire reaction occurs in air, and the solution can be reused, ensuring the optimal utilization of all ions. Additionally, the FeCo(OOH) x -5/NF catalyst was scaled up to 6000 cm 2 to assess the feasibility of roll-to-roll industrial production. In practical alkaline water electrolysis, electrolyzers equipped with FeCo(OOH) x -5&RANEY Nickel catalysts demonstrated excellent performance, achieving 500 mA cm −2 at 1.75 V in 6.0 M KOH. This work provides valuable insights into the design of efficient alkaline OER electrocatalysts, such as FeCo(OOH) x /NF, for promising industrial applications.
研究领域:
化学工程
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
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2024
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IF 6.3
Yang Li,Shuijing Wang,Hengming Huang,Jiahui Kou,Chunhua Lu,Zhongzi Xu,Jinhua Ye
Faster OH − transfer for efficient adsorption on catalysis is key to accelerating the oxygen evolution reaction (OER). The diffusion of OH − in electrolyte mainly involves two mechanism which is dependent on the water coordination number (CN): Grotthuss diffusion (4 CN) and vehicular diffusion (5 CN). The Grotthuss diffusion is much faster but the vehicular diffusion of OH − is predominant in the electrolyte. Herein, negatively charged kaolin, which are simply dispersed in the electrolyte, are utilized to provide surface electrostatic attraction to H 2 O and repulsion to OH − to reduce the OH − CN from 5 to 4 for rapid Grotthuss diffusion. This contributes to the accelerated OH − adsorption which facilitates the charge transfer, the formation and the deprotonation of *OOH leading to enhanced OER performance. The OH − CN recovery from 4 to 5 is proved quite slow after leaving the kaolin surface, breaking the limitation that kaolin must be on the catalyst surface. This strategy exhibits universality for various electrocatalysts with reduced overpotential by 10–246 mV at 10 mA cm −2 . We provide a clean, simple and low-cost way to promote the industrial development of alkaline water electrolysis.
研究领域:
电化学
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材料科学
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催化
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能量转换
✓ 已验证
产品关联
DOI
高影响因子
EES Catalysis
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2025
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IF 8.1
Jie Yang,Lifang Chen,Xuya Zhu,Wenwen Shi,Mengxue Huang,Chang Liu,Ruimin Ding,Lin Gan,Xi Yin
H2O2 -related electrochemical reactions, including two-electron oxygen reduction reaction (2e-ORR), H2O2 oxidation reaction (HPOR), and H2O2 reduction reaction (HPRR), have received significant attention for the electrosynthesis H2O2 and energy storage. Understanding the complex structure-activity relationships among 2e-ORR/ HPOR/HPRR and their connections is crucial for further developing highly efficient catalysts and working systems. Herein, we unveil these intricacies by employing model Co-N-C catalysts with well-defined active site configuration (Co-N4-pyrrolic and Co-N4- pyridinic ) in a combined experimental and computational approach. We report the higher 2e-ORR/HPOR but lower HPRR activity of CoN4-pyrrolic site than the CoN4-pyridinic site based on their reaction free energy landscapes remodeled considering the chemisorption steps of O2 and H2O2 . The results reveal that the binding free energy of *OOH (ΔG*OOH ) can only be utilized as a reliable descriptor for 2e-ORR/HPOR activity, but not indicative of HPRR activity, regardless of the scaling relationship of the common reaction intermediates ( *OOH or *OH). The HPRR activity of CoN 4 sites strongly depends on the H2O2 adsorption strength and configuration. These findings provide valuable insights into the design of catalysts for H2O2 -related electrochemical energy conversion and storage systems.
研究领域:
电化学
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催化
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材料科学
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能量转换与存储
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2024
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IF 8.1
Shiqi Zhang,Ying Cheng,Zhiyuan Ni,Xuefei Lei,Biao Wang,Xuanwen Liu,Rui Guo
Reasonably designing and constructing transition metal based compounds with controllable composition and structure is a promising option for obtaining economically efficient oxygen evolution reaction (OER) electrocatalysts. This paper presents a one-pot self-templated epitaxial growth, phase transition and self-dissolution strategy for constructing hollow nanoboxes/solid nanocubes of CoFe bimetallic Prussian blue analogues (PBAs). The CoFe mixed phosphide with a porous hollow nanoboxes structure obtained after subsequent phosphating heat treatment exhibite enhanced OER electrocatalytic activity in alkaline media, exhibiting a low overpotential of 230 mV and a Tafel slope of 35.5 dec −1 at 10 mA cm −2 , as well as excellent stability for 48 h. The excellent OER activity of CoP-FeP nanoboxes (CoP-FeP NBs) can be attributed to the combination effect between their composition and structure. Structurally, the exquisite porous hollow nanoboxes structure greatly expands the surface area, reduces ion diffusion pathways, and reduces charge transfer resistance. Compositionally, the inner transition metal phosphide exhibits good conductivity and undergoes surface reconstruction during OER, forming high valence Co(Fe)OOH active substances in situ. The strong interface coupling effect of CoOOH/FeOOH optimizes the electronic structure. This work presents a facile and efficient strategy for the construction of PBAs hollow structural materials and the exploitation of low-cost and efficient electrocatalysts.
研究领域:
材料科学
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电化学
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纳米技术
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催化
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）