排序方式: 共有21条查询结果,搜索用时 15 毫秒
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Biodegradable Batteries: A Fully Biodegradable Battery for Self‐Powered Transient Implants (Small 28/2018)
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Liu Daobin Wu Chuanqiang Chen Shuangming Ding Shiqing Xie Yaofeng Wang Changda Wang Tao Haleem Yasir A. ur Rehman Zia Sang Yuan Liu Qin Zheng Xusheng Wang Yu Ge Binghui Xu Hangxun Song Li 《Nano Research》2018,11(4):2217-2228
Nano Research - Atomically dispersed catalysts have attracted attention in energy conversion applications because their efficiency and chemoselectivity for special catalysis are superior to those... 相似文献
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Novel Iron/Cobalt‐Containing Polypyrrole Hydrogel‐Derived Trifunctional Electrocatalyst for Self‐Powered Overall Water Splitting
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Jia Yang Xu Wang Bo Li Liang Ma Lei Shi Yujie Xiong Hangxun Xu 《Advanced functional materials》2017,27(17)
Development of efficient, low‐cost, and durable electrocatalysts for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) is of significant importance for many electrochemical devices, such as rechargeable metal–air batteries, fuel cells, and water electrolyzers. Here, a novel approach for the synthesis of a trifunctional electrocatalyst derived from iron/cobalt‐containing polypyrrole (PPy) hydrogel is reported. This strategy relies on the formation of a supramolecularly cross‐linked PPy hydrogel that allows for efficient and homogeneous incorporation of highly active Fe/Co–N–C species. Meanwhile, Co nanoparticles are also formed and embedded into the carbon scaffold during the pyrolysis process, further promoting electrochemical activities. The resultant electrocatalyst exhibits prominent catalytic activities for ORR, OER, and HER, surpassing previously reported trifunctional electrocatalysts. Finally, it is demonstrated that the as‐obtained trifunctional electrocatalyst can be used for electrocatalytic overall water splitting in a self‐powered manner under ambient conditions. This work offers new prospects in developing highly active, nonprecious‐metal‐based electrocatalysts in electrochemical energy devices. 相似文献
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Wei Jiang Lei Wang Qin Wang Han Zhou Yinchu Ma Wang Dong Hangxun Xu Yucai Wang 《Advanced functional materials》2021,31(20):2100354
Solid tumors are characterized by a hypoxic and immunologically “cold” microenvironment that dramatically limits the therapeutic outcomes of immunotherapy. Thus, strategies and materials that are capable of reversing immunosuppression in immune-cold tumors are highly desired. Herein, it is reported that oxygen (O2) self-supplementing conjugated microporous polymer nanosheets can be utilized to elicit a robust antitumor T cell immune response in the hypoxic and immunosuppressive tumor microenvironment. The ultrathin nanosheets can generate O2 through the water splitting reaction and produce massive reactive oxygen species (ROS) under near infrared light irradiation. Meanwhile, the unique photothermal property of the conjugated polymer nanosheets generates hyperthermia under irradiation. Consequently, they are able to maximize the immunogenic cell death (ICD) performance by inducing adequate damage-related molecular patterns in hypoxic tumors. Other than fostering T cell infiltration by the elicited ICD, the loaded indoleamine 2,3-dioxygenase in nanosheets can reverse the immunosuppression and empower ICD effect for efficient T cells priming. In vivo experiments conclusively prove that the designed polymer nanosheets exhibit great potential for tumor eradication, metastasis prevention, as well as long-term survival. Such a photocatalytic platform opens up new paths for reversing immunosuppression in immune-cold tumors and broadens the application of polymer-based nanosheets for cancer therapy. 相似文献
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Highly efficient and durable water oxidation electrocatalysts are critically important in a wide range of clean energy technologies,including water electrolyzers and rechargeable metal-air batteries.Here,we report a novel sonochemical approach to synthesize amorphous nickel-iron oxides/carbon nanohybrids with tunable compositions for the oxygen evolution reaction (OER).The sonochemically synthesized amorphous electrocatalysts with optimal composition exhibit a low overpotential of 290 mV at 10 mA·cm-2 and a Tafel slope of 31 mV·decade-1 in a 0.1 M KOH electrolyte,outperforming the benchmark RuO2 catalyst.Meanwhile,these nanohybrids are also highly stable and remain amorphous even after prolonged cycling.In addition to amorphism,sonochemistry endows as-prepared nickel-iron oxides/carbon nanohybrids with a simultaneously formed carbon scaffold and internal Ni(0),which can enhance the stability and activity for the OER.This work demonstrates that sonochemistry is a unique method for synthesizing amorphous metal oxides toward an efficient and durable OER. 相似文献
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Biodegradable Electronics: Materials,Designs, and Operational Characteristics for Fully Biodegradable Primary Batteries (Adv. Mater. 23/2014)
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