INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2021
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IF 5.816
Jia-Xin Liu,Ming Yang,Ren-Feng Jiang,Xiu-Cheng Zheng,Pu Liu
Ammonia borane (AB) hydrolysis is a comparative strategy for developing the sustainable hydrogen economy . Considering the hydrolysis cannot occur kinetically at low temperature, a suitable catalyst is indispensable. In this work, the dispersed ruthenium nanoparticles are stabilized on hexagonal boron nitride (h-BN) via an adsorption-in situ reduction procedure. Various characterization techniques are adopted for elucidating the structure-performance relationship of the obtained catalysts for the hydrolytic dehydrogenation of AB. In the presence of the resultant Ru/h-BN catalysts, the corresponding turnover frequency (1177.5 min −1 ) in alkaline solution at 303 K and the apparent activation energy (24.1 kJ mol −1 ) are superior to most literature previously reported. Our work provides a facile fabrication method for metal-based catalysts, which are highly promising in chemical storage material hydrolysis.
研究领域:
化学
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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
MOLECULES
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2024
·Vol. 29
·期 16
·3892
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IF 4.2
Bin Yang,Xinyao Ding,Lifeng Feng,Mingyi Zhang
The development of efficient and cost-effective electrocatalysts is crucial for achieving a green hydrogen economy through electrocatalytic water splitting. Herein, we report an excellent catalyst, one-dimensional NiS2/NiS/Mn2O3nanofibers prepared by electrospinning, which exhibits outstanding electrochemical performance in an alkaline solution. We explored effective strategies to construct one-dimensional nanostructures and composite oxides to promote the electrocatalytic performance of transition metal dichalcogenides. At a current density of 20 mA cm−2, it requires an overpotential of 333 mV for OER. Furthermore, NiS2/NiS/Mn2O3nanofibers maintain good durability even after 1000 cycles. The long-term electrochemical stability test of the catalyst NiS2/NiS/Mn2O3was implemented at 20 mA cm−2for 12 h. The potential remained at 99.52%. Therefore, this study demonstrates that NiS2/NiS/Mn2O3can serve as a viable green hydrogen production electrocatalyst.
研究领域:
材料科学
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能源化学
✓ 已验证
DOI
高影响因子
RENEWABLE ENERGY
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2025
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IF 9.1
Meihong Fan,Minghao Wang,Wenbo Bi,Yuzhu Jiang,Hui Chen,Xingquan He,Qingqing Pan
The development of efficient and durable alkaline water splitting electrocatalysts is vital for advancing the renewable hydrogen economy, a key pillar of sustainable energy systems. Here, we present an entropy-driven synthesis of phase-pure cobalt boride (CoB) nanosheets by a molten salt-assisted pyrolytic method. The obtained CoB, grown in situ on carbon cloth, can serve as an efficient electrocatalyst toward the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) simultaneously. Remarkably, it requires only overpotentials of 110 mV for HER and 240 mV for OER to drive a current density of 10 mA cm −2 , respectively, addressing the critical need for cost-effective catalysts in renewable energy conversion. Experiments in combination with theoretical calculations reveal that interstitial B atoms can modulate the adsorption energy of Co sites and optimize the Co–H bond strength through the electron transfer between Co and B, thereby enhancing intrinsic HER activity. While in the OER, CoB nanosheets undergo in situ transformation into amorphous CoOOH, which acts as the highly active catalytic phase for the OER. This work not only provides a promising bifunctional electrocatalyst for alkaline water splitting but also offers fundamental insights into the catalytic mechanisms, paving the way for rational design of advanced electrocatalysts.
研究领域:
能源材料
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电化学
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纳米技术
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催化
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材料科学
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可再生能源
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表面科学
✓ 已验证
产品关联
DOI
高影响因子
Theranostics
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2022
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IF 11.6
Qinqin Jiang,Bin Qiao,Xiaohong Lin,Jin Cao,Nan Zhang,Huanling Guo,Weiwei Liu,Lingyu Zhu,Xue Xie,Li Wan,Rui Tang,Bing Liang,Dong Wang,Zhigang Wang,Yang Zhou,HaiTao Ran,Pan Li
The outcome of sonodynamic immunotherapy is significantly limited by tumor hypoxia. To overcome this obstacle, one common solution is to catalyze the conversion of endogenous H 2 O 2 into O 2 . However, the effectiveness of this strategy is limited by the insufficient concentration of H 2 O 2 in the tumor microenvironment (TME). Herein, we developed a H 2 O 2 economizer for on-demand O 2 supply and sonosensitizer-mediated reactive oxygen species production during ultrasound activation, thereby alleviating hypoxia-associated limitations and augmenting the efficacy of sonodynamic immunotherapy. Methods: The H 2 O 2 economizer is constructed by electrostatic adsorption and π-π interactions between the Fe-doped polydiaminopyridine (Fe-PDAP) nanozyme and chlorin e6. By employing a biomimetic engineering strategy with cancer cell membranes, we addressed the premature leakage issue and increased tumor-site accumulation of nanoparticles (membrane-coated Fe-PDAP/Ce6, MFC). Results: The prepared MFC could significantly attenuate the catalytic activity of Fe-PDAP by reducing their contact with H 2 O 2 . Ultrasound irradiation promoted MFC dissociation and the exposure of Fe-PDAP for a more robust O 2 supply. Moreover, the combination of MFC-enhanced sonodynamic therapy with anti-programmed cell death protein-1 antibody (aPD-1) immune checkpoint blockade induced a strong antitumor response against both primary tumors and distant tumors. Conclusion: This as-prepared H 2 O 2 economizer significantly alleviates tumor hypoxia via reducing H 2 O 2 expenditure and that on-demand oxygen-elevated sonodynamic immunotherapy can effectively combat tumors.
研究领域:
生物医学工程
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癌症治疗
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纳米技术
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免疫疗法
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肿瘤学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）