APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Shou-Guo Qin,Jia Liu,Zhen-Yu Chen,Xi-hao Liu,Huiyan Feng,Yudan Feng,Zhi-Qun Tian,Panagiotis Tsiakaras,Pei-Kang Shen
Herein, we report a manganese-stabilized ternary intermetallic compound L1 0 -PtCoMn as a highly active and extremely stable nanocatalyst for oxygen reduction reaction (ORR). In the half-cell test, the mass activity (MA) and specific activity (SA) of the optimal component L1 0 -PtCo 0.8 Mn 0.2 are approximately 8.5 and 8.1 times higher than Pt/C, respectively, showing outstanding ORR catalytic activity. In PEMFC tests, the L1 0 -PtCo 0.8 Mn 0.2 cathode exhibits an excellent MA (0.954 A / mg Pt at 0.9 V iR-free ) and a superior durability (only ∼8.6% loss in MA and ∼5 mV voltage drop at 0.8 A cm −2 after 30k ADT cycles), surpassing most of reported Pt-based ORR catalysts. Theoretical calculations reveal that incorporating Mn not only optimizes the adsorption energy (ΔE O *) of the intermediate O* and thus enhance ORR activity, but also facilitates the formation of the order-structured L1 0 -PtCoMn alloy and strengthens the interatomic interaction forces, leading to its superb durability. This work provides new highlights for developing highly ORR performing nanocatalysts for PEMFCs.
研究领域:
材料科学
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电化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Xianfeng Guan,Di Yu,Yu Luo,Shuyu Zhang,Wanzhen Wu,Guangpeng Ma,Xinpu Zhou,Cuicui Li,Shuang Wang
Polybenzimidazole (PBI) is commonly used for high-temperature proton exchange membranes. However, it is undeniably challenging for phosphoric acid (PA)-doped PBI membranes to have both high proton conductivity and excellent long-term stability. In this study, a series of polymer ionic liquid composite PBI membranes were fabricated. These membranes are made using two azide-functional ionic liquids and amino-polybenzimidazole, adjusting the amount of the two ionic liquids. The ionic pairs offered by the ionic liquids positively impact the transportation of protons and the stability of PA through the replacement of anions. It is noteworthy that crosslinked amino-polybenzimidazole membranes containing functional polymeric ionic liquids have proton conductivity of up to 131.7 mS cm −1 at 180 °C, and the PA retention after 240 h at 160 °C under humidity-free conditions is 86.5 %. In addition, the membrane is used in membrane electrodes with hydrogen and oxygen at the anode and cathode, respectively, exhibiting a peak power density of 694.6 mW cm −2 at 160 °C. And the voltage decay rate is 0.28 mV h −1 after long-term test. The findings indicate that membranes made of functional polymeric ionic liquids crosslinked with amino-polybenzimidazoleprovide a new strategy to enhance fuel cell durability.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 9
·094506
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IF 4.386
Wendong Cheng,Shuai Hou,Fen Guo
The traditional electric furnace pyrolysis to produce heteroatom doped carbon faces the time-consuming issue due to the fixed size of furnace chamber and indirect heat transfer. Herein a fast Joule-heating pyrolysis method, viz., powering on the C, N, Fe-containing, conductive polyaniline precursor at fixed direct current (DC) voltage for a specific time, is put forward. The polyaniline precursor begins to decompose thermally when being powered with a DC voltage of 5.0 V upwards. In the pyrolysis products, Fe and N co-doping of carbon material leads to C–N bonding and C-Fe bonding in a certain way. The direct peroxide-peroxide fuel cell (DPPFC) with the optimal Fe, N codoped carbon material as anode and cathode can generate an open circuit voltage of 0.85 V and a peak power density of 29.7 mW cm−2 in ambient temperature, which is highly competitive compared with other DPPFCs with anode and/or cathode made of noble metals.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Huan Li,Chaoxiang Su,Chaoqi Wang,Zhe Lü
In this work, we report FeCo 2 O 4 - x Ce 0.8 Sm 0.2 O 1.9 ( x = 0, 30, 40, 50, 60, 70 wt%), catalyst/electrolyte composite oxides , as cathode materials for application in solid oxide fuel cells. Herein a systematic investigation represents the effect of Ce 0.8 Sm 0.2 O 1.9 incorporation on physical and electrochemical properties . The obtained results indicate that the addition of Ce 0.8 Sm 0.2 O 1.9 to form FeCo 2 O 4 –Ce 0.8 Sm 0.2 O 1.9 composite material plays a key role in physical and electrochemical properties. Among all the components, the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode has the lowest polarization resistance of ∼0.094 Ω cm 2 at 800 °C in air, which is much smaller than that of the FeCo 2 O 4 cathode (4.18 Ω cm 2 ). In comparison with the FeCo 2 O 4 cathode, the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode has a better electrocatalytic activity and a larger power density of 397 mWcm −2 based an electrolyte-supported single-cell configuration at 800 °C. The oxygen partial pressure dependence studies indicate that rate limiting steps of the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 composite cathode are the adsorption process of the molecular oxygen on the electrode surface and the charge-transfer process. In consequence of these superior properties, it is reasonable to believe that the FeCo 2 O 4 –60Ce 0.8 Sm 0.2 O 1.9 oxide has great potential to become a cathode material for solid oxide fuel cells.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Jie Luo,Jie You,Shuai Tan,Caihong Wang,Yong Wu
Humidified perfluorosulfonic acid polymers with a nanoscopic phase-separated morphology are highly proton-conductive materials for fuel cells, yet morphology tuning of the acidic materials for enhanced conduction remains a challenge. Aqueous acidic lyotropic liquid crystals (LLCs) provide a powerful platform to construct well-defined nanostructures for proton conduction. We report an aqueous LLC formed by 1-tetradecyl-3-methylimidazolium hydrogen sulfate, exhibiting a proton conductivity of 210 mS cm–1 at 25 °C, which surpasses that formed by alkylsulfonic acid, thus demonstrating that a mobile acidic anion is more efficient than constrained sulfonic acid functionality to transport protons in LLCs. For an aqueous solution of 1-alkyl-3-methylimidazolium hydrogen sulfate, a lamellar LLC results in higher conductivity than a micellar solution under the same hydration conditions. The peak power density of the fuel cell fabricated from porous membranes filled with the lamellar LLC is four times as high as that filled with the micellar solution. The work offers an efficient way to construct highly proton-conductive LLC materials for fuel cell application.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
·
IF 7.139
Zhaojie Yang,Minghua Zhang,Zhixin Zhao,Wenting Lan,Xi Zhang,Minmin Fan
Two types of new 2D MXenes (LiF–Ti 3 C 2 T x and NH 4 HF 2 –Ti 3 C 2 T x ) were prepared by selective etching of Ti 3 AlC 2 with LiF/HCl and NH 4 HF 2 aqueous solutions, respectively, and they were introduced as nanofillers into quaternized polysulfone/polyquaternium-10 (QPSU/PQ-10) anion exchange membranes (AEMs) with semi-interpenetrating polymer network, thereby preparing two types of MXene-doped QPSU/PQ-10 AEMs. The resulting MXene-doped QPSU/PQ-10 AEMs have obvious nanoscale microphase-separated morphologies, and their ionic conductivity and power density are significantly improved compared with the pristine QPSU/PQ-10 AEM. Among them, the ionic conductivity and power density of NH 4 HF 2 –Ti 3 C 2 T x MXene-doped AEM can reach 88.76 mS/cm at 80 °C and 106.28 mW/cm 2 at 60 °C, respectively, which are 26.3% and 37.5% higher than those of the pristine QPSU/PQ-10 AEM. Additionally, the MXene-doped QPSU/PQ-10 AEMs with semi-interpenetrating network have moderate water uptake and swelling ratio, excellent thermal and mechanical properties , as well as good oxidation resistance and alkaline stability, which can meet the application requirements of AEMs for fuel cells, exhibiting their bright application prospects in fuel cells.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2022
·
IF 7.926
Zhikang Deng,Yongtao Cheng,Jinyao Zhu,Lie Yang,Zulin Zhang,Li Wu
Thiacloprid (THI), as a commonly used neonicotinoid, is frequently detected in environmental media, posing a potential threat to the environment and organisms. In this study, microalgae fuel cells (MFCs) with Chlorella sp. as cathode and wastewater (with sludge) as anode were constructed to remove THI (10, 20 and 50 mg/L) while generating bioelectricity . The results showed that, comparing with the open-circuit condition, the generation of bioelectricity (closed-circuit) significant enhanced the removal of THI by 13.14–32.47%. The presence of low concentration of THI (10–20 mg/L) did not significantly affect the accumulation of Chlorella sp. biomass, while high concentration THI (50 mg/L) strongly depressed its biomass. It was also found that high concentration THI caused obvious oxidative damages (MDA) to Chlorella sp., although SOD activity was upregulated. Both the highest THI removal efficiency (%) and stable bioelectricity voltage (202 mV) occurred at the low THI concentration (10 mg/L). Seven degradation products of THI were identified and the oxidation of the thiazole ring was the main detoxification way of THI. Additionally, toxicity evaluation also showed that the toxicity of degradation products were lower than THI. This study implies that MFCs could be a promising application, coupling pollutants removal , bioenergy generation and biomass production.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
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2017
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IF 4.798
Ankang Zhu,Guilin Zhang,Tingting Wan,Tingting Shi,Hong Wang,Mingzai Wu,Chunchang Wang,Shouguo Huang,Youmin Guo,Hao Yu,Zongping Shao
Proton-conducting solid oxide fuel cells (H + -SOFCs) have attracted considerable interest recently. However, the overall cell performance of H + -SOFCs is still low due to the lack of a promising cathode material. In this study, SrSc 0.175 Nb 0.025 Co 0.8 O 3-δ (SSNC) was synthesized for evaluation as a cathode material in H + -SOFCs based on a BaZr 0.1 Ce 0.7 Y 0.2 O 3-δ (BZCY) electrolyte. The chemical compatibility and stability of the SSNC cathode with the BZCY electrolyte in humidified air were studied. In addition, the electrochemical behavior of the SSNC cathode on the BZCY electrolyte was investigated using SSNC/BZCY/SSNC symmetrical cells at 600 °C in dry air and humidified air at various H 2 O partial pressures . Promising electrocatalytic activity was observed for the SSNC cathode in humidified air. The area specific resistance obtained on symmetrical cells at 600 °C in a 10% H 2 O-air atmosphere was 0.26 Ω cm 2 . A promising peak power density of 498 mW cm −2 was obtained using an anode-supported cell with a 46 μm-thick BZCY electrolyte layer at 700 °C.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Ziyu Zhang,Chang Liu,Yunkun Dai,Bo Liu,Pan Guo,Fengdi Tu,Miao Ma,Lixiao Shen,Zigang Zhao,Yangyang Liu,Yunlong Zhang,Lei Zhao,Zhenbo Wang
Carbon supports for cathodic catalysts in proton-exchange membrane fuel cells suffer from rapid corrosion and instability; therefore, alternative supports with a stable structure and a high electric conductivity are highly required. In this paper, a three-dimensional support hybridized by MXene and Ketjen Black is developed, in which Ketjen Black is sandwiched between MXene nanosheets (MCM). After decorating with Pt nanoparticles by a facile wet-chemical approach, a three-dimensional (3D) Pt/MCM catalyst is obtained. The intercalated Ketjen Black prevents the stacking of MXene nanosheets, thus increasing the specific surface area of the catalyst and exposing the active sites. The strong interaction between functionalized MXene nanosheets and Pt nanoparticles further enhances its intrinsic electrocatalytic activity. Pt/MCM demonstrated encouraging ORR activity with the half-wave potential and specific activity of 0.892 V and 0.377 mA·cm–2, respectively, surpassing the state-of-the-art Pt/C catalysts. Especially, Pt/MCM achieves ultrahigh durability with a 1 mV decrease in half-wave potential and a 1.73% decrease in mass activity after an accelerated durability test. Given the performance and structure–activity relationships of Pt/MCM, it holds great potential for various energy and catalysis-related applications.
研究领域:
材料科学
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电化学
·
能源技术
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Lingping Zeng,Xiaoli Lu,Caili Yuan,Wei Yuan,Ke Chen,Jingying Guo,Xiaoxi Zhang,Jianchuan Wang,Qiang Liao,Zidong Wei
High-performance proton exchange membrane (PEM) is crucial for the proton exchange membrane fuel cell (PEMFC). Herein, a novel “self-enhanced” PEM is fabricated for the first time, which is composed of perfluorinated sulfonic acid (PFSA) resin and its own nanofibers as reinforcement. With this strategy, the interfacial compatibility issue of conventional fiber-reinforced membranes is fully addressed and up to 80 wt% loading of PFSA nanofibers can be incorporated. Furthermore, on account of chain orientation within the PFSA nanofiber, single fiber exhibits super-high conductivity of 1.45 S cm −1 , leading to state-of-the-art proton conductivity (1.1 S cm −1 ) of the as-prepared “self-enhanced” PEM so far, which is an order of magnitude increase compared with the bulk PFSA membrane (0.29 S cm −1 ). It surpasses any commercial PEM including the popular GORE-SELECT and Nafion HP membranes and is the only PEM with conductivity at 10 0 S cm −1 level. In addition, the mechanical strength and swelling ratio of membranes are both substantially improved simultaneously. Based on the high-performance “self-enhanced” PEM, high peak power densities of up to 3.6 W cm −2 and 1.7 W cm −2 are achieved in H 2 -O 2 and H 2 -Air fuel cells, respectively. This strategy can be applied in any polymeric electrolyte membrane.
研究领域:
材料科学
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能源工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2024
·
IF 3
Tianxin Zhao,Lulu Wang,Yang Zhang,Fan Zhang,Jilin Wang
A series of anion exchange membranes (AEMs) with highly ion conductivity suitable for practical application in fuel cells were prepared in this paper. Polysulfone (PSf) was used as backbone to prepare chloromethylation polysulfone (CMPSf). Then the synthesized CMPSf was blended with tetramethyldiaminopropane (TMPDA) and polyethylene glycol (PEG 400), to construct interpenetrating polymer networks with hydrogen-bonding conduction sites. In this paper the chemical structure of the AEM is confirmed by nuclear magnetic resonance spectrum ( 1 H NMR) spectroscopy and fourier transform infrared spectroscopy (FT-IR). The morphologies of synthesized membranes in this paper are investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The electrochemical and physical properties of AEMs are tested comprising water uptake (WU), ion exchange capacity (IEC), alkaline stability, thermal stability and mechanical stability. The introduction of hydrogen-bonding networks enhanced the OH − conductivity of the membranes (from 37.03 mS·cm −1 of QAPSf-PEG 0% to 104.67 mS·cm −1 of QAPSf-PEG 30% ). The interpenetrating polymer networks make the membranes have good mechanical property (tensile strengh is 19.61 MPa, elongation at break is 20.30 %) and anti-swelling properties (29.3 %, 80 °C). Due to the introduction of hydrogen-bonding conduction networks, the alkaline stability of the AEMs can be enhanced by reducing the modification of the polysulfone backbone. Thus, even after soaking in 6 mol·L −1 KOH solution for 30 days, the retained OH − conductivity of QAPSf-PEG 3 0% still reached 92.0 %. At the same time, the addition of PEG leads to the increased water uptake, so that the OH − ions could be better transported. And the single cell performance of QAPSf-PEG 30% was also revealed that the power density increases significantly from 323.35 mW·cm −2 at 60 °C to 514.8 mW·cm −2 at 80 °C as the temperature increases. Overall, QAPSf-PEG 30% exhibits promising development potential in the fuel cells.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Xiuxiu Li,Enyi Hu,Faze Wang,Peter D. Lund,Jun Wang
Samarium oxide (Sm2O3) is a promising electrolyte for low-temperature fuel cells but lacks further exploration of performance optimization. Herein, we propose an effective approach to strengthen the proton transport characteristics via constructing a heterostructure interface in a Sm2O3/ZnO composite electrolyte. The constructed optimal 6Sm2O3-4ZnO cell device yields an improved peak power density of 920 mW cm–2 and an extended durability performance of 45 h at 500 °C. Experiments confirm the proton conduction, and the density functional theory calculation further discloses the low proton migration energy of 0.35 eV. The semiconductor junction test and theoretical calculation both reveal that the heterojunction exists at the Sm2O3/ZnO interface. The strong local electric field strength of 1.53 × 107 V m–1 at the interface effectively suppresses short circuit and accelerates proton transport, leading to significantly enhanced electrochemical performance. This study indicates that the 6Sm2O3-4ZnO material is a promising electrolyte candidate for fuel cell application.
研究领域:
材料科学
·
能源工程
✓ 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）