INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
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IF 7.2
Yuan Li,Xu Zhang,Yanting Tian,Xueying Wu,Lei Wang,Jiping Zhu
The electrochemical performance of Ca 3 Co 4 O 9+δ (CCO) oxygen electrode with La 0.6 Sr 0.4 FeO 3-δ (LSF) interlayer in YSZ-based reversible solid oxide cells (RSOCs) was investigated in present work. Results proved that CCO oxygen electrode with LSF interlayer had a superior stability under alternating anodic and cathodic polarization . Both the polarization resistance and overpotential of the CCO electrode with LSF interlayer were significantly reduced compared to that with Ce 0.9 Gd 0.1 O 1.95 (GDC) interlayer, which confirmed the improvement of the redox reactivity of the oxygen electrode. The maximum power density of Ni-YSZ/YSZ/LSF/CCO fuel cell was 1276 mW cm −2 at 800 °C. An electrolysis current density of 1695 mA cm −2 was achieved at 1.5 V and 50% H 2 O. The hydrogen production rate of the electrolysis cell improved by 2 times than that with the GDC interlayer. Results made clear reliability of LSF as an interlayer in YSZ-based RSOCs.
研究领域:
材料科学
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能源工程
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电化学
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 15
·4893-4902
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IF 6.177
Keting Feng,Tao Sun,Xiaoyun Hu,Jun Fan,Dongyuan Yang,Enzhou Liu
Photocatalytic H2 evolution is a promising way to obtain green H2 due to its clean and sustainable characteristics. Herein, a series of 0D/2D Co0.85Se/TiO2 heterojunctions were fabricated through a successive two-step hydrothermal strategy. Among them, 15%-Co0.85Se/TiO2 displays the most excellent H2 rate of 2312.5 μmol g−1 h−1, which is 10.3 times and 10.8 times higher than that of TiO2 and Co0.85Se, respectively. And the H2 production rate per electrochemically active surface area of 15%-Co0.85Se/TiO2 is 127.41, which is obviously more than that of TiO2 (14.17) and Co0.85Se (5.39). Based on the core-level alignment method and free radical capture tests, the enhanced activity mainly resulted from the higher electrochemically active surface area and the formation of a p–n heterostructure between TiO2 and Co0.85Se. This research provides a strategy for the development of noble metal-free nanocomposites for efficient photocatalytic H2 production.
研究领域:
材料科学
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化学
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能源科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
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IF 22.1
Xiangdong Xue,Wenjun Dong,Qingjie Luan,Hongyi Gao,Ge Wang
Promoting photo-induced electron transfer is one of the most efficient approaches for improving photocatalytic hydrogen production performance. Herein, we construct a novel interfacial lateral electron migration path by introducing CoP 2 into CdS photocatalytic system as cocatalyst for the first time. This peculiar migration path can be attributed to two aspects: 1) the built-in electric field between CoP 2 and CdS could drive carrier separation effectively; 2) the “metallized” interface serves as a special electron trap to accumulate electrons and promote them transfer along it instead of diffusion into cocatalyst. The energy-efficient interface shortens the electron migration distance and make more hot electrons participate in the reaction at the active sites with lower activation energy. As expected, the optimal hydrogen production rate of CoP 2 /CdS reaches up to 1071 mmol h −1 g −1 , which is one of the most robust photocatalytic hydrogen production systems.
研究领域:
材料科学
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催化
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能源转换
✓ 已验证
产品关联
DOI
高影响因子
Communications Materials
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2020
·Vol. 1
·期 1
·1-10
·
IF 0
Jin Zhengyuan,Jiang Xiantao,Zhang Qitao,Huang Shaolong,Zhang Luhong,Huang Lili,He Tingchao,Zhang Han,Ohno Teruhisa,Ruan Shuangchen,Zeng Yu-Jia
Broad-spectrum light activation in photocatalytic materials is considered vital for effective solar-to-hydrogen energy conversion. Here, we propose an upconversion process in oxygen-doped polymeric carbon nitride (C 3 N 4 ) nanosheets, resulting in high photocatalytic activity for hydrogen generation from water splitting under infrared light irradiation. Due to the upconversion, the photoexcited electrons are transferred to the conduction band, and a σ* carbon-oxygen orbital localized on the triazine matrix ring resulting from oxygen doping extends the lifetime of photogenerated electrons, which increases the photocatalytic activity under both infrared and visible light. Our material exhibits high apparent quantum efficiency of 0.014% and 23% at 850 nm and 420 nm, respectively. Under infrared light (λ ≥ 800 nm, 24 mW cm −2 ), the hydrogen production rate of our material is 22.84 μmol h −1 g −1 , which can reach a yield similar to that of pristine C 3 N 4 under visible light.
研究领域:
材料科学
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化学
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可再生能源
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光催化
✓ 已验证
DOI
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Pengyu Wei,Yaxin Lv,Changyang Liu,Ziliang Liu,Lilin Yang,Ruixue Tian,Jun Peng,Liuzhen Bian,Shengli An
Perovskite oxide-based materials are promising electrode materials for reversible symmetric solid oxide cells (RSSOCs) as they exhibit good catalytic activity and stability in oxidizing and reducing atmospheres. In this study, A-site deficient (La 0.5 Sr 0.5 ) 0.95 Fe 0.9 Mo 0.1 O 3-δ (95LSFMo) is synthesized as an electrode material for RSSOCs. The A-site defect in La 0.5 Sr 0.5 Fe 0.9 Mo 0.1 O 3-δ increases the surface oxygen vacancy concentration, promoting the transport of oxygen ions and enhancing the catalytic activities of oxygen reduction (ORR) and hydrogen oxidization reaction (HOR). 95LSFMo|LSGM|95LSFMo symmetric cell achieves a maximum power density (MPD) of 1.14 W cm −2 at 850 °C. Furthermore, the adsorption and reduction of H 2 O is also improved. In 50 %H 2 O-H 2 , 95LSFMo cell shows a current density of −1.71 A cm −2 at 850 °C and 1.3 V in electrolysis mode and a peak power density of 0.82 W cm −2 in fuel cell mode. The corresponding hydrogen production rate reaches 714.78 ml cm -2 h −1 . Moreover, the 95LSFMo cell exhibits good reversibility as well as SOEC stability.
研究领域:
材料科学
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电化学
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
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