INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Jialuo Li,Guojie Gao,Yu Wei,Taolue Liu,Hanwen Xu,Mingxia Guo,Xin Ding,Yan Gao
Abstract Coupling CO2 reduction with thermodynamically favorable anodic oxidation offers a promising route for lowering the energy demand of paired electrosynthesis. Herein, we report a bismuth-based paired electrosynthesis system (Bi NSs/CF || Bi/NF-20) for the simultaneous coproduction of high value formate at both electrodes via cathodic CO2 reduction (CO2RR) and anodic methanol oxidation (MOR). Crucially, these self-supported electrodes are rationally constructed through a spontaneous galvanic replacement strategy, offering a sustainable alternative to conventional energy intensive fabrication. Consequently, the integrated two-electrode electrolyzer operates stably at 3 V for 50 h, yielding a combined FE exceeding 185% and impressive production capacities of more than 400 g kWh–1. Combined in situ Raman spectroscopy and theoretical calculations reveal that the intrinsic electronic properties of the Bi NSs/CF facilitate the rate-determining step by lowering the *OCHO formation barrier, and elucidate the dynamic evolution of active sites during the MOR. This study offers a compelling strategy for designing integrated electrolyzers toward CO2 valorization with high atom economy.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Qiang Li,Dongyang Pei,Xianduo Zhang,Hong Sun
All-vanadium redox flow battery (VRFB) with high power density is urgent in energy storage area. This study investigated the impact of Ti 3 C 2 T X /Bi as catalyst on VRFB performance at high current density . The Ti 3 C 2 T X /Bi decorated electrode was prepared based on a facile dropping method. Owing to the synergistic effect between Bi and Ti 3 C 2 T X , the hydrogen evolution reaction (HER) is effectively inhibited and the electrochemical activity towards V 2+ /V 3+ redox reaction is enhanced. With the current densities ranging from 100 mA·cm −2 to 220 mA·cm −2 , VRFB equipped with Ti 3 C 2 T X /Bi modified graphite felt shows the best rate performance. Furthermore, at a current density of 200 mA·cm −2 , the battery with Bi and Ti 3 C 2 T X modified electrode shows the highest capacity retention rate of 70.3 % after 100 charge-discharge cycles and the highest energy efficiency (EE) of 80.1 %.
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NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 48
·期 5
·1998-2007
·
IF 3.3
Li Feng,Hanping Fu,Tianxiang Zhang,Qing Zhang,Shufen Ren,Jiayun Cheng,Qingshuang Liang,Xiufeng Xiao
The surface properties of a photocatalyst play a pivotal role in maximizing the H2O2 generation efficiency of the photocatalyst system, especially in spurring the surface catalytic reactions and inhibiting the decomposition of H2O2. Herein, a series of Bi/BiOBr-X (X = 1, 2, and 3) photocatalysts co-modified with metal Bi and oxygen vacancies were obtained by a one-step solvothermal method using mannitol as a solvent and a reducing agent. Both Bi modification and the introduction of OVs have important influence on extending the light absorption range, enhancing charge carrier separation and suppressing the recombination of charge carriers as confirmed by UV-vis DRS, EIS, and PL characterization. Besides, the introduction of OVs can lead to an upward shift of CB minimum, which results in a stronger reduction ability of the photogenerated electrons, facilitating the reaction of the photogenerated electrons with molecular oxygen to produce superoxide ions. Meanwhile, the deposition of Bi nanoparticles on the surface of BiOBr nanosheets can significantly inhibit the decomposition of H2O2. Benefiting from the synergetic effect of Bi modification and the introduction of OVs, the as-prepared photocatalysts showed enhanced H2O2 production activity as high as 100.9 mM h−1 g−1. The present work not only marks a significant advancement in photocatalytic H2O2 production technology, but also provides a feasible idea and strategy for photocatalytic production of clean and renewable energy.
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Advanced Electronic Materials
·
2023
·Vol. 10
·期 3
·2300651
·
IF 6.2
Tianpeng Yu,Shuyi Hou,Zhenliang Liu,Yiru Wang,Jiang Yin,Xu Gao,Nannan Liu,Guoliang Yuan,Lei Wu,Yidong Xia,Zhiguo Liu
Organic field-effect transistors (OFETs) hold great promise for applications in non-volatile memories, detectors, and artificial synapses due to the good flexibility and biocompatibility. However, certain drawbacks such as high operating voltages and significant degradation in endurance characteristics have hindered their practical implementations. Herein, a novel approach is proposed to enhance the performance of OFETs by incorporating a bi-functional n-type polymer semiconductor interlayer, Poly-{[N,N'-bis(2-octyldodecyl)naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)} (N2200), into a pentacene OFET structure. The device exhibits remarkable improvements, with reliable P/E operation cycles of over than 10 4 and a retention time of more than 10 years. On one hand, the inclusion of N2200 as an n-type semiconductor effectively reduces the height of hole-injection barrier for trapping and thus reducing the working voltage based on the electrostatic induction theory. On the other hand, n-type semiconductor N2200 serves as a native hole-consumption (or hole-trapping) dielectric, and its narrower bandgap restrains the formation of deep hole-traps, thus favoring the endurance characteristics of the OFET.
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Science China-Technological Sciences
·
2023
·Vol. 66
·期 10
·2930-2941
·
IF 4.6
Liu Sheng,Liao SiHua,Liu Dan,Zhao Rong,Zhou Teng,Yan WenYuan,Wei KeXiang,Zou HongXiang,Zhao LinChuan
Triboelectric nanogenerators (TENGs) are highly promising energy-harvesting devices that exhibit considerable potential for use in self-powered wearable electronics. Nano/microfillers and surface microstructure modification have been proposed to improve the triboelectric performance of TENGs. In this work, performance-enhanced flexible polydimethylsiloxane (PDMS) was developed through bi-material (reduced graphene oxide/fluorinated ethylene propylene, rGO/FEP) modification and filtration-membrane-patterned surface microstructure. The rGO/FEP with high charge-inducing and -trapping capabilities can be used as the dielectric-enhanced filler for improving triboelectricity. Ordered micro-dents of 5–50 µm are created on the modified PDMS surface with an increased contact area of TENG. Compared with the pure PDMS, the modified PDMS film-based TENG could deliver a substantial enhancement in power density (0.87 mW cm −2 ) by 28 times. Further, the versatility of this device is demonstrated in human activity monitoring and capacitor charging. This work provided a simple, high-tunability, and scalable approach for improving the output performance of TENGs for biomechanical energy-harvesting devices that can be integrated into self-powering wearable electronics.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiahao Chen,Miao He,Anjun Hu,Mengjiao Liu,Chuan Zhao,Bo Zhou,Runjing Li,Zhongfu Yan,Yu Pan,Yining Fan,Jing Liu,Liujun Cao,Jianping Long
Rechargeable aqueous zinc-ion hybrid supercapacitors (ZHSs) are drawing extensive attention because of their cost-effectiveness and diminished safety hazards. Nevertheless, large-scale application of ZHSs has been hindered by the severe side reactions and rampant dendrites growth on the surface of Zn metal anodes. Herein, we propose a three-dimensional organic–inorganic composite frame material as an artificial bi-functional layer coated on the zinc foil, featuring nitrogenous functional groups with zincophilicity (abbreviated as NCFM@Zn). The nitrogen (N) site's strong adsorption capacity and synergistic effect of the sub-nanopore size promote rapid desolvation of zinc ions and reduce side reactions, while also prolonging galvanized nucleation's Sand's time and allowing for even nucleation. Moreover, the uniform distribution of N on the layer results in homogeneous zinc ions flux and supports consistent zinc plating while inhibiting dendrites generation. As a result of this unique artificial bi-functional layer, symmetric Zn cells can survive 2500 h at 2.5 mA cm −2 . High-areal-capacity zinc||activated carbon hybrid supercapacitors also demonstrate 20,000 cycles at high Coulombic efficiency, thus highlighting the utter convenience and potential of this strategy for modifying rechargeable metal hybrid supercapacitor surfaces.
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PubMed
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Nanomaterials
·
2023
·Vol. 13
·期 11
·1767
·
IF 5.3
Wenqin Lai,Yating Liu,Mingming Zeng,Dongmei Han,Min Xiao,Shuanjin Wang,Shan Ren,Yuezhong Meng
The rapid development of electrochemical CO2reduction offers a promising route to convert intermittent renewable energy into products of high value-added fuels or chemical feedstocks. However, low faradaic efficiency, low current density, and a narrow potential range still limit the large-scale application of CO2RR electrocatalysts. Herein, monolith 3D bi-continuous nanoporous bismuth (np-Bi) electrodes are fabricated via a simple one-step electrochemical dealloying strategy from Pb-Bi binary alloy. The unique bi-continuous porous structure ensures highly effective charge transfer; meanwhile, the controllable millimeter-sized geometric porous structure enables easy catalyst adjustment to expose highly suitable surface curvatures with abundant reactive sites. This results in a high selectivity of 92.6% and superior potential window (400 mV, selectivity > 88%) for the electrochemical reduction of carbon dioxide to formate. Our scalable strategy provides a feasible pathway for mass-producing high-performance and versatile CO2electrocatalysts.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jiaying Yan,Yayu Guan,Barbara Marchetti,Yuyu Liu,Fanghua Ning,Jin Yi,Xiao-Dong Zhou
Electrochemical reduction of CO 2 (ERCO 2 ) is an effective way to convert CO 2 into useful chemical products. However, most catalysts used for ERCO 2 show poor selectivity and stability. Here, we design a Bi 8 Eu 1 bimetallic catalyst, which exhibits both excellent stability (>400 h) and Faradaic efficiency for formate production (∼100% at − 0.89 V RHE ). Moreover, high Faradaic efficiency (>97%) is observed over a wide potential window (from − 0.89 V RHE to − 1.19 V RHE ). In a flow-cell, the Bi 8 Eu 1 catalyst shows an ultra-high current density of 250 mA cm −2 at − 0.77 V RHE . Density functional theory calculations indicate that the Bi-Eu interactions activate the Bi sites for strongly stabilizing *OCHO intermediates, thus promoting the conversion of CO 2 to formate. This work provides insights into the design of excellent electrocatalysts for ERCO 2 with improved activity and durability.
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ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 27
·2215109
·
IF 19
Yanran Zhu,Qian Chen,Yue Zhou,Xingya Li,Liang Ge,Tongwen Xu
Acid recycling via cation exchange membranes (CEMs) has attracted considerable attention from traditional industries and advanced manufacturing because of the economic and environmental advantages. However, current polymeric CEMs merely have constant ion channels by the fixed groups in the matrix and lack the synergy of bi-functional sites. Herein, a series of dibenzo-18-crown-6 (DB18C6) functionalized sulfonated poly(biphenyl alkylene) membranes is reported. The resultant membranes form phase separation and ordered ion channels by the electrostatic interaction between DB18C6-H + complexes and the SO 3 − anionic sites, constructing a low-swelling synergistic hydrophilic network. The prepared membranes have high proton permeation rates of 2.98-4.85 mol m −2 h -1 and extremely low ferrous ion permeabilities, leading to a high H + /Fe 2+ selectivity of ≈3153 at the current density of 10 mA cm -2 , which is one order of magnitude higher than the commercial and previously reported membranes via the electrodialysis. These results provide strategies for designing bi-functional ion exchange membranes for selective ion transport via utilizing crown ether/cation complexes.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 20
·10857-10866
·
IF 11.9
Qiang Peng,Meng Ma,Qindan Chu,Hao Lin,Wenting Tao,Wenqin Shao,Si Chen,Yanqin Shi,Huiwen He,Xu Wang
With the rapid development of electronic equipment and communication technology, it is urgent to develop composites with absorption-dominated and high electromagnetic interference shielding effectiveness (EMI SE) to prevent secondary pollution of electromagnetic (EM) waves. Herein, an effective strategy is employed to fabricate porous Ni-coated melamine foam (Ni@MF)/multi-walled carbon nanotubes (CNT)/temperature-sensitive microspheres (TSM)/polydimethylsiloxane (PDMS) composite foams with an absorption-dominated EMI shielding mechanism and high EMI SE at low filler loading. The bi-conductive network, including a high-efficiency Ni@MF sponge obtained by electroless plating and ordered arrangement and distribution of CNTs induced by the volume exclusion effect, endows the Ni@MF/CNT/TSM/PDMS composite foam with an extremely high conductivity of 2799.8 S m−1 and excellent EMI SE of 45.3 dB with a low CNT loading of 3.0 wt%. The absorption coefficient (A) exceeding 0.72 indicates the absorption-dominated EMI shielding mechanism due to weakened impedance matching and diversiform dissipation mechanisms. What's more, the hydrophobicity, excellent mechanical properties, stable pH resistance and outstanding EMI shielding durability promote the composite foams to maintain impressive performance even in complex and harsh environments. This work establishes an efficient strategy for the absorption-dominated EMI shielding composite foams with a porous structure and bi-conductive network structure, which reveals prospective applications in intelligent electronic equipment and next-generation communication technologies.
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CHEMOSPHERE
·
2023
·
IF 8.8
Litao Jia,Chenjia Yang,Xiaoyong Jin,Dan Wang,Fanghua Li
A hot research topic in visible-light-driven photoelectrocatalytic (PEC) oxidation technology is the development of superior photoanode materials. The design of the photoanode system with a direct Z-scheme charge transfer mechanism is crucial to achieving effective charge separation for sustainable photoelectrocatalysis. Here, a novel Bi / Bi 2 S 3 /α-MoO 3 heterostructure was successfully assembled by a simple and feasible strategy. The direct Z-scheme heterogeneous formed between Bi 2 S 3 and α-MoO 3 has the advantages of low resistance, high optical response current and the surface plasmon resonance (SPR) effect of Bi nanoparticles (Bi NPs). Thus, the efficiency of photogenerated carrier separation and transfer is further enhanced, and the catalytic activity is significantly improved. It is impressive that the unique photoanode has achieved a maximum removal efficiency of 85.8% of tetracycline (TC) pollutants under visible light irradiation within 60 min and has excellent stability, which is expected to degrade antibiotics efficiently and environmentally in harsh environments. These characteristics give Bi / Bi 2 S 3 /α-MoO 3 promising candidates for practical applications in antibiotic degradation.
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Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 6
·1240-1261
·
IF 7
Po Zhang,Jialin Chen,Yuzhi Sun,Zhicheng Cao,Yanan Zhang,Qingyun Mo,Qingqiang Yao,Wei Zhang
Osteochondral defect (OCD) regeneration remains a great challenge. Recently, multilayer scaffold simulating native osteochondral structures have aroused broad interest in osteochondral tissue engineering. Here, we developed a 3D multifunctional bi-layer scaffold composed of a kartogenin (KGN)-loaded GelMA hydrogel (GelMA/KGN) as an upper layer mimicking a cartilage-specific extracellular matrix and a hydroxyapatite (HA)-coated 3D printed polycaprolactone porous scaffold (PCL/HA) as a lower layer simulating subchondral bone. The bi-layer scaffolds were subsequently modified with tannic acid (TA) prime-coating and E7 peptide conjugation (PCL/HA-GelMA/KGN@TA/E7) to regulate endogenous stem cell behaviors and exert antioxidant activity for enhanced osteochondral regeneration. In vitro, the scaffolds could support cell attachment and proliferation, and enhance the chondrogenic and osteogenic differentiation capacity of bone marrow-derived mesenchymal stem cells (BMSCs) in a specific layer. Besides, the incorporation of TA/E7 significantly increased the biological activity of the bi-layer scaffolds including the pro-migratory effect, antioxidant activity, and the maintenance of cell viability against oxidative stress. In vivo, the developed bi-layer scaffolds enhanced the simultaneous regeneration of cartilage and subchondral bone when implanted into a rabbit OCD model through macroscopic, micro-CT, and histological evaluation. Taken together, these investigations demonstrated that the 3D multifunctional bi-layer scaffolds could provide a suitable microenvironment for endogenous stem cells, and promote in situ osteochondral regeneration, showing great potential for the clinical treatment of OCD.
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