ELECTROCHIMICA ACTA
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2023
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IF 6.6
Chunyan Fan,Zehao Zang,Xiang Li,Junfang Zhang,Ping Yang,Lanlan Li,Xiaofei Yu,Xiaojing Yang,Zunming Lu,Xinghua Zhang
Transition metal hydroxides have superior oxygen evolution reaction (OER) activity but poor hydrogen evolution reaction (HER) performance, which greatly limits the water splitting for hydrogen production. Herein, copper modification of sulfur doped Co(OH) 2 hybrid catalyst (Cu@S-Co(OH) 2 ) was prepared by one-step of electrodeposition method which can serve as efficient hydrogen evolution reaction catalyst. In the presence of sulfur and copper, Cu@S-Co(OH) 2 hybrid catalyst exhibits the best catalytic activity, showing ultralow overpotential of 42 mV at a current density of 10 mA cm −2 . Compared with Co(OH) 2 , the overpotential is improved by nearly 100 mV as well as enhanced stability. In addition, the active site poison experiments proved that the active center is cobalt metal. Combined with the adsorption strength of the catalyst for OH and H species, it is considered that both S and Cu can enhance the adsorption of OH for Co(OH) 2 , while S is contributed to the adsorption of H, and Cu can promote the desorption of H. This work provides a facile method and new insight to enhance the HER activity for transitional metal hydroxides via metal and non-metallic elements co-modulation.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Xiaoxia Liu,Sa Yang,Yanli Cheng,Donglei Wei,Hou Chen,Liangjiu Bai,Wenxiang Wang,Huawei Yang,Lixia Yang,Kun Yin
A hydrogel-based photocatalyst is synthesized by the construction of a hydrogel skeleton using common monomers and subsequent in situ generation of Zn–Cu–S photocatalyst particles. The photocatalytic degradation performance of the hydrogel-based photocatalyst is systematically studied, and the photocatalyst exhibits good removal ability for eosin Y. The composite photocatalyst shows high efficiency at low loading, with a removal rate of up to >98% in 3 hours under sunlight irradiation, without the need for a preliminary dark adsorption process. High removal efficiency was observed, remaining above 95% even after 10 recycling runs, demonstrating the excellent stability of the composite photocatalyst. We thus provide a facile method to construct hydrogel-based photocatalysts that show high application potential in the photocatalytic removal of eosin Y.
研究领域:
环境科学
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材料科学
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化学工程
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光催化
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产品关联
DOI
高影响因子
ACS Catalysis
·
2024
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IF 11.3
Heng Cao,Xiaodi Zhu,Jiawei Xue,Ruyang Wang,Jiusi Shang,Peiyu Ma,Chengyuan Liu,Jun Bao
Precise design of photocatalysts with the demanded active surface structure for highly efficient and selective CO2 photoreduction is crucial but challenging. Here, by taking CdS as a prototype, single-atom Cu is successfully constructed on Cd-deficient CdS (Cd1–xS) to improve the performance of CO2 photoreduction with H2O as proton donor. The optimal Cu/Cd1–xS with Cd vacancies (VCd)-mediated single-atom Cu exhibits nearly 100% selective CO production and a more than three-fold higher CO evolution rate compared to that of Cd1–xS. Both experimental identification and DFT theoretical simulation unveil that the VCd-mediated single-atom Cu render Cu–S pair sites to function as more catalytically active sites for dissociating H2O and promoting the corresponding proton supply, which favors the subsequent protonation of the adsorbed CO2 at the adjacent Cd sites via the two-proton coupled two-electron transfer pathway. This work demonstrates the importance of modulating proton supply from the oxidation half-reaction for facilitating the overall CO2 photoreduction, advocating an overall-reaction perspective for the design and development of highly efficient and selective CO2 conversion photocatalysts.
研究领域:
材料科学
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催化化学
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理论计算
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产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2024
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IF 4.2
Yajie Wang,Yanan Gao,Jingxuan Yang,Bin Liu
C 3 N 5 is emerging as an important visible light catalyst because of its narrow band gap, nontoxicity and thermal stability. Herein, sulfur-doped g-C 3 N 5 (SCN) was prepared by copolymerization of thioacetamide (TAA) and 3-amino-1,2,4-triazole (3-AT). Then copper nanoparticles (Cu NPs) were anchored onto the SCN framework, resulting in the formation of Cu/SCN. It was found that the average H 2 production rate of SCN and Cu/SCN was 0.76 and 1.34 mmol g −1 h −1 , which was much higher than that of C 3 N 5 , respectively. Acting as a new active spots, sulfur doping effectively reduces the band gap of g-C 3 N 5 , and the formation of S-Cu bonds further creates an efficient electron transport pathway. As a result, Cu/SCN possesses a broader visible light absorption spectrum, stronger reduction capability, and greater efficiency in photo-induced carrier separation and transfer. Therefore, this work introduces a novel strategy for design of high efficiency photocatalytic H 2 evolution carbon nitride through non-noble metal and sulfur anchoring junction.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Surfaces and Interfaces
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2024
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IF 5.7
Cijun Shuai,Gao Pan,Qi Zhong,Shuping Peng
Bacterial infections considerably limit the success of scaffold transplantation. CuO 2 may generate hydroxyl radicals through a self-cascade catalytic process, which is effective for sterilization. However, reducing CuO 2 -derived Cu + ions to Cu° can lead to a decline in catalytic activity. To overcome these limitations, we anchored CuO 2 onto MoS 2 to establish stable Cu-S-Mo interfacial sites. The CuO 2 /MoS 2 nanozyme was fabricated using a low-temperature co-precipitation technique and introduced into poly- l -lactic acid scaffolds using selective laser sintering. The Cu-S-Mo interfacial sites showed a triad of functions that synergistically enhanced catalytic performance. These sites stabilized the Cu atoms, augmented catalytic activity by facilitating efficient electron transfer through the Mo 4+ /Mo 6+ redox couple, and improved the conduction of heat derived from the photothermal response of MoS 2 to the Cu catalyst. The synergistic action of chemodynamic and photothermal therapy, mediated by the Cu-S-Mo sites, resulted in remarkable antibacterial efficacy, with 92.3 % and 93.5 % inhibition rates against Staphylococcus aureus and Escherichia coli , respectively. Experimental evidence and simulations demonstrated that Cu-S-Mo structure stabilized the Cu atoms and improved electron transfer via interatomic charge transfer. These results highlight the potential of the CuO 2 @MoS 2 /PLLA scaffold in eliminating bacterial infections.
研究领域:
材料科学
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生物医学工程
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微生物学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Xitao Qiao,Shuaidong Wang,Xin Han,Jiaye Qin,Yanyan Wang,Guangke Tian
Cu 2 S and Cu–S based materials with the introduction of 15 at% and 63% at% Cr respectively were prepared on carbon cloth (CC) (Cu 2 S/CC, Cu 5.6 CrS 6 /CC and CuCr 1.4 S 5 /CC) by one-pot hydrothermal synthesis. It was found that the phase composition and morphology of Cu–S undergo significant changes with the introduction of Cr content, thereby impacting their electrocatalytic hydrogen evolution reaction (HER) properties. In particular, for Cu 5.6 CrS 6 /CC, 15 at% Cr introduction facilitated the formation of a highly catalytically active Cu 7 S 4 -dominant phase and a hexagonal flake-like morphology with a large specific surface area conducive to fully exposing the catalytically active sites. The synergistic advantages in morphology and phase composition endow Cu 5.6 CrS 6 /CC with the best HER electrocatalytic performance with a low overpotential of 81 mV (10 mA cm −2 ) and 142 mV (100 mA cm −2 ), a Tafel slope of 43 mV dec −1 , and 10000 cycle stability. This study provides an idea for implementing a synergistic strategy of phase engineering and morphology modulation by introducing Cr to construct high-performance HER catalysts.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
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IF 21.1
Xue Wang,Guo Li,Hao Huang,Hongxiang Jin,Yangyingzhi Liu,Fan Yang,Rong He,Wenkun Zhu
Electrochemical uranium extraction in real nuclear wastewater containing ultrahigh concentration of F - is challenging, which requires the development of extraction material with highly exposed active sites for dominant uranyl complex species. Herein, we implant open active pairs of Cu + -SO x on an open flower-structured Cu-S-O nanosheets by pulse electro-oxidation, enabling the efficient electrochemical uranium extraction in real nuclear wastewater with F - . In this case, the open structure ensures the sufficient contact with electrolyte, together with the open active pairs selective binding with the dominant UO 2 F x species. In simulated nuclear wastewater, the open Cu-S-O nanosheets with open active pairs possessed an optimum extraction efficiency of 98.6 % in 300 min, which was 1.2-time larger than that of CuS nanosheets. Moreover, the Cu-S-O nanosheets maintained the remarkable efficiency regardless of the variation of pH, the interfering ions, and the ratio of U/F. The mechanistic study revealed an evolution of UO 2 F x adsorption, uranium reduction, and UO 2.34 crystallization. In real acidic nuclear wastewater from the fabrication of fuel element, the Cu-S-O nanosheets electrochemical extracted 95.6 % of the uranium, with a facile collection of the uranium oxide product.
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
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Yuanzhi Yue,Guozhe Sui,Yan Zhuang,Dongxuan Guo,Shuang Meng,Dantong Zhang,Xue Yang,Ning Liu,Yue Li,Jinlong Li
In this study, we developed a synergistic modulation strategy through in situ dual-anion/cation doping coupled with vacancy engineering, demonstrating a direct ammonia etching approach to synthesize Cu/S-In(OH) 3 with controlled indium vacancies (V In ) from CuInS 2 precursors. This in situ doping approach provides a uniform distribution of Cu cations and S anions throughout the material, overcoming conventional doping heterogeneity. Simultaneously, an indium vacancy (V In ) structure was precisely engineered and regulated through a growth limitation strategy. The synergistic interplay between the uniformly dispersed anions, cations and V In significantly suppresses the recombination of photogenerated carrier within In(OH) 3 , thereby allowing more carriers to participate in the surface catalytic reaction. Both experimental and theoretical analyses demonstrate that the introduction of V In into the defective states leads to a direct reduction in the band gap, significantly improving photocatalytic hydrogen evolution performance. The optimized Cu/S-In(OH) 3 with V In achieves a photocatalytic hydrogen production rate of 1.22 mmol g −1 h −1 , approximately 122 times higher than that of pure In(OH) 3 (0.01 mmol g −1 h −1 ). This work establishes a paradigm of integrating in situ doping and vacancy engineering strategies to rationally design In(OH) 3 -based materials, offering generalizable principles for advanced catalytic applications.
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产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2025
·
IF 5
Hulin Gao,Jian Liu,Jiamei Hao,Meiguang Jiang,Xu Bai,Da Li,Rong Huang
The reduction of sulfur impurities in copper concentrates typically necessitates a highly alkaline environment generated by excessive lime addition, owing to the analogous surface flotation properties of chalcopyrite and pyrite. In this study, an innovative approach was proposed by pre-combining green reagent xanthan gum (XG) with calcium (II) ions to enhance its efficacy as a selective depressant for pyrite. Micro-flotation tests on mixed minerals revealed that XG alone exhibits no depressive effect, whereas the application of the XG-Ca at pH 9 enhances the Cu grade of the concentrate to 29.70% (from 16.43% in the raw mineral), with the recovery of chalcopyrite and pyrite being 85.31% and 12.60%, respectively. The complexation-enhanced depression mechanism of Ca on XG and the interaction mechanism between XG-Ca and pyrite surfaces were evaluated using techniques such as XPS, FTIR, TOF-SIMS, SEM-EDS, and molecular dynamics simulations. The results indicated that calcium ions primarily coordinate with carboxyl groups, inducing the extension of XG side chains and greater exposure of functional moieties, which facilitates the formation of a uniform and compact adsorption layer on pyrite surfaces. There are primarily two interaction mechanisms between XG-Ca and Pyrite: (1) The coordination of carboxyl groups (–COO − ) from XG-Ca with Fe sites on the pyrite surface; and (2) calcium-mediated electrostatic bridging between surface hydroxyl groups (–OH) of pyrite and functional groups in XG-Ca. This study proposes an innovative approach of pre-combining xanthan gum with calcium ions, offering valuable insights for developing efficient and green depressants for Cu-S separation.
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Cai Xiunan,Tian Ling,Chen Meifei,Liu Yijun,Wang Wei,Long Junhao,Zhang Yanjuan,Tao Gan,Hu Huayu,Huang Zuqiang
To effectively treat the hydrophobic organic contaminant and utilize an industrial solid waste manganese residue (MR), a novel starch-derived carbon (SC)-decorated and Cu-doped (Fe,Cu)S/CuFe 2 O 4 solid solution (CFS/CFO@SC) was prepared from MR via mechanical activation treatment of precursor materials followed by one-step pyrolysis and applied as a photo-Fenton catalyst to treat a hydrophobic organic compound, 17α-ethinylestradiol (EE2). Characterization results showed that the CFS/CFO@SC solid solution with unique crystal and electronic structures exhibited high adsorption capacity and catalytic activity , ascribed to that Cu doping and C decorating enhanced its hydrophobicity and BET surface area. The CFS/CFO@SC showed excellent degradation efficiency with nearly 100% of EE2 removal rate in 40 min (degradation rate constant of 0.112 min −1 ), and a high mineralization degree with 95.2% of TOC removal in 180 min. This could be ascribed to that C decorating and the formation of CFS/CFO solid solution promoted the charge transfer in a continuous band, resulting in effective separation of photogenerated holes–electrons (h + –e – ). The strong interaction of Fe–Cu collaborating with the photoelectron could effectively accelerate the recycle of Fe 3+ /Fe 2+ and Cu 2+ /Cu + , thus generating more active radicals. Moreover, CFS/CFO@SC showed promising stability and recyclability with the EE2 removal rates all >95% after five cycles. This work brings a valuable approach for the rational design of high-performance Fe-based photo-Fenton catalysts for environmental remediation and the valorization of MR.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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