ENERGY & FUELS
·
2022
·
IF 4.654
Yongshuo Yang,Qiqi Zhang,Xinmin Yang,Huilin Hu,Lequan Liu,Jinhua Ye,Defa Wang
WO3 is one of the most promising photocatalysts with a suitable energy band structure for water oxidation; however, the quick recombination of photoinduced charge carriers seriously limits the photocatalytic efficiency. Loading of suitable cocatalysts is considered as an effective method to significantly improve the photocatalytic activity. Herein, we used a facile one-step hydrothermal method and a “hydrothermal + photodeposition” method to synthesize xCo3O4/WO3 (x = 0.2, 0.4, 0.8) and yCoOOH/WO3 (y = 2, 3, 4), respectively. We found that, in comparison with the pristine WO3, both xCo3O4/WO3 and yCoOOH/WO3 exhibited remarkably increased photocatalytic O2 evolution activities owing to the loading of two Co-based cocatalysts Co3O4 and CoOOH, respectively. Moreover, the optimal O2 evolution rate achieved over 0.4Co3O4/WO3 (194 μmol·h–1) was ∼2.1 times that over 3CoOOH/WO3 (94 μmol·h–1). The superior photocatalytic O2 evolution activity of Co3O4/WO3 over CoOOH/WO3 could be attributed to the mixed valences of Co2+ and Co3+ in Co3O4, which was more favorable than CoOOH with the sole valence of Co3+ for promoting the separation and transfer of photoinduced electrons and holes. This work suggests a promising way to the development of noble-metal-free cocatalyst by using transition-metal oxide with mixed valence states for efficient photocatalytic water oxidation.
研究领域:
材料科学
·
化学
·
催化
·
环境科学
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产品关联
DOI
高影响因子
Small
·
2025
·
IF 12.1
Lizhuo Qi,Jing Li,Yuanyuan Liu,Kaihua Liu,Meiri Wang,Hongtao Cui
The behavior transformation of battery-type materials to extrinsic pseudocapacitive behavior is accomplished by suppressing their phase transition. The resulting extrinsic pseudocapacitive materials are a valuable supplement to intrinsic pseudocapacitive materials, enriching the connotation of pseudocapacitive materials. Nevertheless, the research on this category of materials remains inactive as of now, probably due to the as yet unclear phase transition suppression mechanism and the associated electrochemical mechanism. In this work, the battery-type Co(OH) 2 is selected as a research object to create an extrinsic pseudocapacitive material by S 2− doping. It is revealed that the K + intercalation/deintercalation is the essential reason for the phase transition of CoOOH that is irreversibly converted from Co(OH) 2 , leading to its battery-type behavior. Whereas, the fully protonated CoOOH produced due to the high reaction activity of S 2− doped Co(OH) 2 only allows the intercalation/deintercalation of H + . During the process of intercalation/deintercalation of H + , CoOOH retains the P3 structure, thereby giving rise to extrinsic pseudocapacitive behavior. The electrochemical measurement results indicate that this extrinsic pseudocapacitive material and the assembled device have electrochemical performance equivalent to that of intrinsic pseudocapacitive materials.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2026
·Vol. 38
·期 2
·e70115
·
IF 2.6
Haixu Wang,Tingwei Zhang,Zhen Sun,Xiaonan Qi,Rongsong cao,Chuanlai Jiao
Efficient bifunctional electrocatalysts are crucial for the advancement of rechargeable zinc-air batteries (ZABs). In this article, we successfully synthesized a high-performance catalyst R-CoOOH@FeOOH through the oxygen evolution reaction (OER). Additionally, in situ Raman characterization results indicate that CoFe@NC-w undergo electrochemical reconstruction during the OER, leading to the formation of CoOOH and FeOOH species. This dynamic structural evolution is responsible for the enhanced OER activity of the catalyst. This transformation endowed the catalyst with exceptional OER activity. In addition, the catalyst exhibited exceptional performance in the oxygen reduction reaction, which shows a half-wave potential of 0.86 V vs. (RHE) reversible hydrogen electrode. When integrated into a ZAB, the catalyst delivers a low charging potential of 2.3 V at a high current density of 50 mA cm −2 , accompanied by an excellent long-term durability of 600 h. These findings offer viable strategies for the development of high-performance catalysts for ZAB.
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2026
·
IF 4.1
Li Yijiang,Chen Shaoxing,Huang Leijuan,Lin Biying,Cai Zhixiong,Xie Yuanfu
Alkaline phosphatase (ALP) is an important clinical biomarker, and rapid activity quantification is needed in routine diagnostics. Here, we report a CoOOH nanosheet–based colorimetric assay for ALP that uses a H₂O₂-free TMB chromogenic module. CoOOH nanosheets catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to produce the blue oxidized product, while ALP hydrolyzes ascorbic acid 2-phosphate (AAP) to generate ascorbic acid (AA), which reduces/decomposes CoOOH and suppresses the TMB signal, resulting in a distinct blue-to-colorless readout. Under optimized conditions, the absorbance response is linear with ALP activity from 0.01 to 25 mU mL −1 with a detection limit of 0.01 mU mL −1 . The assay shows good robustness against common matrix components (e.g., urea, glucose, proteins, and major inorganic ions), whereas thiol-containing reductants can attenuate the signal at elevated levels. Serum recovery tests gave recoveries of 94.30–97.50% with RSDs of 1.9–4.9%, confirming reliability in complex matrices. This method provides a simple, cost-effective, and sensitive approach for ALP activity measurement. In addition, the CoOOH–TMB pair serves as a general H 2 O 2 -free TMB signal module, suggesting potential adaptability to microplate-based ALP-linked immunoassay/ELISA formats. Graphical
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DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Li Guixian,Jin Gang,Wang Chenjing,Zhong Dazhong,Li Jinping,Zhao Qiang
Cobalt-based catalysts have been reported to electrocatalyze the oxidation of 5-hydroxymethylfurfural (HMFOR) to high-value-added chemicals. However, generating highly active Co 3+ OOH at low potential remains a grand challenge. In this paper, we describe the electronegative metal-doped cobalt metal-organic frameworks (Co-MOFs) that facilitate the formation of Co 3+ OOH for efficient HMFOR. Electrochemical measurements and in situ characterization reveal that the introduction of electronegative metals and the use of MOF facilitate cobalt oxidation and enhance hydroxyl adsorption, thereby promoting C–OH bond activation and yielding more free water, contributing to the HMFOR performance. The obtained CoNi-BDC delivers a low potential of 1.14 V vs RHE at 10 mA cm –2 and a high current density of 560 mA cm –2 at 1.48 V vs RHE, with a Faradaic efficiency (FE) of 95% for 2,5-furandicarboxylic acid (FDCA), and favorable cycling stability. The work provides insight into promoting Co 3+ OOH formation for advancing the electrocatalytic conversion of biomass.
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DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 3
·440-448
·
IF 1.071
Lyu Cong,Li Yicheng,Fang Chen,Feng Wei,Sun Wentian,Zhang Qihui
Peroxymonosulfate(PMS) has received increasing attention as viable technology for recalcitrant organics removal from polluted waters. Although promising, alternative heterogeneous catalysts with stable structure, strong hydrophilicity, environmental friendliness and excellent catalytic performance are highly desirable to facilitate the wide industrialization of PMS. In this work, Ni doped CoOOH catalyst was employed as PMS activator. Ni dopant had a significant influence on the morphology, structure and catalytic performance of CoOOH, Ni 0.2 Co 0.8 OOH exhibited the best catalytic performance. Reaction rate of Ni 0.2 Co 0.8 OOH was 2, 4, and 4.4 times that of CoOOH, CoFe 2 O 4 and Co 3 O 4 , respectively. Moreover, Ni 0.2 Co 0.8 OOH/PMS system had potential application to organic pollutants and displayed a great catalytic activity over a broader pH value( e.g. , 4–10). More importantly, Ni doping accelerated the transformation of Co(III) and Co(II) and formed active species CoOH + and NiOH + , which were responsible to the enhancement of PMS activation. • OH, \(\overline G \) and 1 O 2 were detected, indicating both non-radical and radical processes in the Ni 0.2 Co 0.8 OOH/PMS system. These findings provide a promising alternative to mixed-metal oxyhydroxides catalysts for PMS activation, demonstrating a great potential in environmental remediation and wastewater treatment.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2020
·Vol. 15
·期 4
·1-11
·
IF 4.053
Xi Tianhao,Li Xiaodan,Zhang Qihui,Liu Ning,Niu Shu,Dong Zhaojun,Lyu Cong
Cobalt oxyhydroxide (CoOOH) has been turned out to be a high-efficiency catalyst for peroxymonosulfate (PMS) activation. In this study, CoOOH was loaded on bismuth oxide (Bi 2 O 3 ) using a facile chemical precipitation process to improve its catalytic activity and stability. The result showed that the catalytic performance on the 2,4-dichlorophenol (2,4-DCP) degradation was significantly enhanced with only 11 wt% Bi 2 O 3 loading. The degradation rate in the CoOOH@Bi 2 O 3 /PMS system (0.2011 min −1 ) was nearly 6.0 times higher than that in the CoOOH/PMS system (0.0337 min −1 ). Furthermore, CoOOH@Bi 2 O 3 displayed better stability with less Co ions leaching (16.4% lower than CoOOH) in the PMS system. These phenomena were attributed to the Bi 2 O 3 loading which significantly increased the conductivity and specific surface area of the CoOOH@Bi 2 O 3 composite. Faster electron transfer facilitated the redox reaction of Co (III) / Co (II) and thus was more favorable for reactive oxygen species (ROS) generation. Meanwhile, larger specific surface area furnished more active sites for PMS activation. More importantly, there were both non-radical ( 1 O 2 ) and radicals (SO 4 − •, O 2 − •, and OH•) in the CoOOH@Bi 2 O 3 /PMS system and 1 O 2 was the dominant one. In general, this study provided a simple and practical strategy to enhance the catalytic activity and stability of cobalt oxyhydroxide in the PMS system.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2025
·
IF 2
Yubei Lin,Yuqiao Liu,Xin Huang,Renjie Li,Hailin Jiang,Ruishi Xie,Yongjun Ma
The development of high-efficiency, low-cost catalysts to enhance the thermal decomposition of ammonium perchlorate (AP) is crucial for improving the performance of composite solid propellants. In this study, CoOOH nanocatalysts were synthesized via a precipitation method, while Co 3 O 4 counterparts were subsequently obtained through calcination. A systematic comparison of their catalytic effects on AP thermal decomposition was conducted using thermogravimetric analysis (TG), differential scanning calorimetry (DSC), and real time infrared spectroscopy. These techniques enabled comprehensive investigation of kinetic parameters, high-temperature reaction pathways, and decomposition physical models. Furthermore, structure-performance relationships between catalyst characteristics and AP decomposition efficiency were elucidated. Notably, the incorporation of 2 wt% CoOOH nanosheets significantly advanced the high-temperature decomposition peak of AP by 124°C, the heat release increased by 81.4%, the activation energy decreased by 26.7%, and the decomposition rate increased by 431.2%. The excellent catalytic performance of CoOOH is attributed to its unique nanosheet structure and abundant surface reactive oxygen species. The study also reveals a mechanistic transition of the CoOOH+AP system from the L2 model to the R3 model, which establishes a theoretical framework and practical approach for optimizing propellants through nanocatalyst engineering.
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 18
·4569-4578
·
IF 4.3
Li Meng Xiao,Kang Kai Wen,Huang Min,Cheng Ru,Wang Wei,Gao Jie,Wang Jian
Tyrosinase (TYR), as an important biological enzyme, has been widely used in synthetic biology, medical hairdressing, environmental detection, biological sensors, and other fields. In clinical practice, tyrosinase activity is an important indicator for detecting melanoma. Therefore, the detection of tyrosinase activity is of great importance. Based on the polyphenol oxidase activity of tyrosinase, a simple and rapid detection method was proposed based on the adjustable light scattering properties of cobalt hydroxyl oxide nanoflakes (CoOOH NFs). It was found that the amount and size of CoOOH NFs decreased due to the redox reaction mediated by catechol (CC), resulting in a lower light scattering signal of CoOOH NFs. However, in the presence of tyrosinase, catechol was oxidized to a quinone structure, resulting in the reduced decomposition of CoOOH NFs and recovered light scattering signal, which was developed for the quantitative detection of tyrosinase activity. It was found that in the range of 10–400 U/L, the light scattering intensity was correlated linearly with tyrosinase activity, and the limit of detection was 6.71 U/L (3 σ / k ). To verify the feasibility of the proposed method in clinical samples, the spiked recovery experiments were carried out with human serum samples, which showed recovery rates between 93.0% and 104.6%, suggesting the high accuracy. The proposed assay provides a simple and rapid method for detection of a natural enzyme based on the adjustable light scattering properties of CoOOH nanoflakes, which lays the foundation for the development of various enzyme sensing applications in the future. Graphical abstract
研究领域:
生物化学
·
医学检测
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Carbon Energy
·
2023
·
IF 20.5
Zhichao Jia,Yang Yuan,Yanxing Zhang,Xiang Lyu,Chenhong Liu,Xiaoli Yang,Zhengyu Bai,Haijiang Wang,Lin Yang
Transition-metal oxyhydroxides are attractive catalysts for oxygen evolution reactions (OERs). Further studies for developing transition-metal oxyhydroxide catalysts and understanding their catalytic mechanisms will benefit their quick transition to the next catalysts. Herein, Mo-doped CoOOH was designed as a high-performance model electrocatalyst with durability for 20 h at 10 mA cm −2 . Additionally, it had an overpotential of 260 mV (glassy carbon) or 215 mV (nickel foam), which was 78 mV lower than that of IrO 2 (338 mV). In situ, Raman spectroscopy revealed the transformation process of CoOOH. Calculations using the density functional theory showed that during OER, doped Mo increased the spin-up density of states and shrank the spin-down bandgap of the 3d orbits in the reconstructed CoOOH under the electrochemical activation process, which simultaneously optimized the adsorption and electron conduction of oxygen-related intermediates on Co sites and lowered the OER overpotentials. Our research provides new insights into the methodical planning of the creation of transition-metal oxyhydroxide OER catalysts.
研究领域:
材料科学
·
电催化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 39
·期 2
·219-223
·
IF 2.726
Xiao Long,Wu Huirong,Zhang Yong,Sun Hao,Zhang Wenchao,Lyu Fenglei,Deng Zhao,Peng Yang
O xygen evolution reaction(OER) plays a key role in the electrochemical conversion and storage processes, but the sluggish kinetics of OER strongly impedes its large-scale applications. We herein reported the in situ growth of Fe-benzenedicarboxylate(Fe-BDC) on Co(OH) 2 nanoplates[Fe-BDC/Co(OH) 2 ] that showed remarkably enhanced OER activity than the pristine Co(OH) 2 . The incorporation of Fe species could enhance the intrinsic OER activity of Co and BDC could increase the electrochemically active surface area(ECSA), thus resulting in dramatically enhanced OER activity. In situ Raman spectroscopy characterization disclosed that Fe-CoOOH reconstructed from Fe-BDC/Co(OH) 2 was the real active site for OER. This work highlights the significance of rational tailoring of the nanostructure and electronic structure of Co(OH) 2 and provides more opportunities for its widespread applications.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 2
·1-10
·
IF 5.705
Ding Yongqi,Zhao Junfeng,Li Bo,Zhao Xu,Wang Chao,Guo Minghui,Lin Yuqing
The authors report that cobalt oxyhydroxide (CoOOH) nanoflakes possess intrinsic oxidizing ability to directly oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) to form a blue colored product (oxTMB) even in the absence of H 2 O 2 and oxygen. In the presence of ascorbic acid (AA), less of the blue product is formed because AA reduces oxTMB. These findings constitute a new scheme for colorimetric detection of AA. Absorbance, best measured at 652 nm, linearly drops in the 10 nM to 1 μM AA concentration range, and the limit of detection is 5 nM (at an S/N ratio of 3). The reaction is complete within <5 s and highly selective. A strip test has been designed for fast and on-spot visual detection of AA. The method was applied to the direct estimation of AA in the microdialysate of brain, and also in soft drink samples. The strip test is considered to be a promising tool for the rapid screening of AA in brain and commercial samples.
Schematic of the CoOOH-TMB colorimetric system that exhibits a high selectivity for ascorbic acid (AA). A strip test has been designed for fast and on-spot visual detection of AA.
研究领域:
分析化学
·
生物医学工程
·
食品科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）